Medical Billing Services in South Carolina for Practices Billing Healthy Connections, Medicare, and BlueCross

ProvidaRCM provides medical billing, coding, credentialing, and revenue cycle management for healthcare providers in South Carolina, including Medicare, Healthy Connections Medicaid, and commercial payers such as BlueCross BlueShield of South Carolina. Practices use ProvidaRCM to raise clean claims, cut denials, and shorten days in A/R.

HIPAA-aligned workflows AAPC-certified coders South Carolina payer expertise
99%
Clean claim rate on first submission
24
Average days in accounts receivable
2.1%
Denial rate across managed claims
96%
Net collection rate for client practices

ProvidaRCM reports a 99 percent clean claim rate, 24 average days in A/R, a 2.1 percent denial rate, and a 96 percent net collection rate across client practices nationwide, including South Carolina providers. Metrics reflect reported performance on managed claims and are not a guarantee of individual practice results.

A Growing State Where Four Medicaid Plans and One Dominant Blue Set the Rules

South Carolina adds residents faster than most of the country, but its payer structure is unusually concentrated. Medicaid runs through managed care organizations, commercial coverage is anchored by one Blue plan, and Medicare claims route through a contractor headquartered in Columbia.

South Carolina's population reached 5,570,274 in the 2025 Census estimate, distributed across 46 counties from the Upstate to the Lowcountry. Growth has clustered in the Greenville and Spartanburg corridor, the Charleston metro, and the Grand Strand, while a large share of the state remains rural and medically underserved.

Care delivery is anchored by systems including Prisma Health, MUSC Health, Spartanburg Regional Healthcare System, McLeod Health, Lexington Medical Center, Roper St. Francis Healthcare, and AnMed, alongside thousands of independent physician practices, behavioral health providers, ambulatory surgery centers, and rural health clinics. That mix means most South Carolina claims are submitted by small and mid-sized billing operations, not large hospital revenue cycle departments.

Government payers carry unusual weight here. South Carolina has not expanded Medicaid under the Affordable Care Act, so eligibility remains limited to defined categories. Medicare volume is high because of the state's older population outside the major metros, and Original Medicare claims for South Carolina route through Palmetto GBA, the Medicare Administrative Contractor for Jurisdiction M, headquartered in Columbia.

The state's chronic disease burden is among the highest in the country, with elevated rates of hypertension, diabetes, and stroke. That drives sustained demand for chronic care management, remote physiologic monitoring, and preventive services, each of which carries its own coverage rules, documentation standards, and frequency limits.

ProvidaRCM was built to work inside that structure. Our South Carolina medical billing services give practices the staffing of a full revenue cycle department without the overhead, with specialty-trained billers, certified coders, and denial specialists who work South Carolina payer rules every day.

South Carolina Medicaid is not billed through a single state portal. Healthy Connections coverage is delivered by contracted managed care organizations, so plan assignment decides where a claim goes and which authorization rules apply.

South Carolina billing fact file
Population5,570,274 (2025 Census estimate)
Counties46, with a large rural share
Medicaid programSouth Carolina Healthy Connections Medicaid
Administering agencySouth Carolina Department of Health and Human Services (SCDHHS)
Medicaid modelManaged care through contracted Medicaid MCOs
Expansion statusNot expanded under the Affordable Care Act
Medicare contractorPalmetto GBA, Jurisdiction M, headquartered in Columbia
Dominant commercial carrierBlueCross BlueShield of South Carolina
MarketplaceHealthCare.gov, the federally run exchange

How South Carolina Healthy Connections Medicaid Billing Works

South Carolina Healthy Connections Medicaid is the state's Medicaid program, administered by the South Carolina Department of Health and Human Services. Most members receive coverage through a contracted Medicaid managed care organization rather than fee-for-service, so claims, prior authorizations, and appeals follow the rules of the member's assigned plan. ProvidaRCM verifies plan assignment before every claim and works each plan's requirements separately.

Medicaid MCO

BlueChoice HealthPlan Medicaid

The Medicaid managed care plan affiliated with BlueCross BlueShield of South Carolina, one of the longest-running Healthy Connections plans in the state.

Medicaid MCO

Select Health of South Carolina

Operates the First Choice Medicaid plan and is part of the AmeriHealth Caritas family of companies, serving members across South Carolina counties.

Medicaid MCO

Molina Healthcare of South Carolina

A national Medicaid managed care organization with a South Carolina plan serving Healthy Connections members statewide.

Medicaid MCO

Absolute Total Care

A Centene subsidiary contracted with SCDHHS to provide Healthy Connections Medicaid coverage to members across the state.

South Carolina also operates Healthy Connections Prime, an integrated program for members who qualify for both Medicare and Medicaid. Dual-eligible members enroll in an integrated plan, which changes which payer is primary for a given service and how cost sharing is billed. Medicaid managed care contracts, plan participation, and authorization lists change periodically, so ProvidaRCM confirms current requirements with SCDHHS and each plan rather than relying on prior-year guidance. Requirements vary by payer, plan, and current regulation.

Nine Revenue Cycle Services Built Around South Carolina Payers

Every stage of the revenue cycle either captures reimbursement or loses it. ProvidaRCM manages all nine stages for South Carolina practices, from the first eligibility check to the last appeal.

01

Medical Billing

End-to-end claim creation, scrubbed submission, payment posting, and balance resolution across Healthy Connections plans, Palmetto GBA Medicare, and commercial carriers. We work the claim until it is paid or properly appealed.

Medical billing services
02

Medical Coding

AAPC-certified coders assign ICD-10-CM, CPT, and HCPCS codes with routine internal audit review. Coding is matched to the documentation, so specificity improves without pushing claims into audit risk.

Medical coding services
03

Medical Credentialing

Enrollment with Palmetto GBA Medicare, South Carolina Medicaid, each contracted Medicaid MCO, and commercial networks such as BlueCross BlueShield of South Carolina, with CAQH maintenance handled for you.

Credentialing and payer enrollment
04

Eligibility Verification

Real-time coverage checks before each encounter to catch inactive Medicaid plan assignment, Medicare Advantage changes, and coordination of benefits issues that cause preventable rejections.

Insurance eligibility verification
05

Prior Authorization

Payer-specific authorization for procedures, imaging, and specialty drugs, submitted with complete clinical documentation and followed up daily until a decision is issued.

Prior authorization support
06

Denial Management

Root-cause categorization, corrective action, and appeals filed inside each payer's window. Denial trends feed back into front-end workflows so the same error stops repeating.

Denial management services
07

Patient Statements

Clear statements and flexible payment options for the self-pay balances that make up a meaningful share of South Carolina revenue, given the state's uninsured population.

Patient statement services
08

Out-of-Network Billing

Benefit verification, documentation, and negotiation support for out-of-network and gap-balance situations, including the federal No Surprises Act processes that govern most surprise bills.

Out-of-network billing
09

Medical Transcription

Specialty-specific documentation turnaround that strengthens the clinical record behind every claim, which matters most for the chronic care and behavioral health services common in South Carolina.

Medical transcription

Specialty Billing Teams Matched to South Carolina's Clinical Mix

South Carolina's disease burden and rural geography shape which specialties carry the most claim volume. ProvidaRCM assigns billers and coders who already work inside those clinical workflows.

Behavioral health billing icon

Mental Health

Outpatient therapy, group sessions, telehealth, and addiction treatment coding for South Carolina behavioral health practices.

Telehealth and parity rules Mental health billing services
Cardiology billing icon

Cardiology

Echo, stress testing, catheterization, and device coding for high-volume cardiology groups across the state.

High-dollar procedural denials Cardiology billing services
Orthopedic billing icon

Orthopedics

Fracture care, joint replacement, and surgical orthopedics billing for practices and surgery centers, including global period management.

Global periods and implants Orthopedic billing services
Chiropractic billing icon

Chiropractic

Manipulation coding, active care documentation, and Medicare maintenance therapy handling for South Carolina chiropractic practices.

Active care versus maintenance Chiropractic billing services
Gastroenterology billing icon

Gastroenterology

Colonoscopy, endoscopy, and biopsy coding with screening versus diagnostic rules applied correctly the first time.

Screening to diagnostic conversion Gastroenterology billing services
Pain management billing icon

Pain Management

Injection, block, and implantable device billing aligned to payer medical necessity policies and frequency limitations.

Authorization and frequency edits Pain management billing services
Oncology billing icon

Oncology

Chemotherapy administration, infusion, and radiation oncology billing with drug waste and J-code accuracy reviewed on every claim.

Drug pricing and J-code accuracy Oncology billing services
OB/GYN billing icon

OB/GYN

Global obstetric packages, ultrasound, and preventive women's health billing for OB/GYN practices, with global billing timelines tracked from the first visit.

Global OB package rules OB/GYN billing services

Where South Carolina Practices Lose Revenue and How We Recover It

Revenue leakage in South Carolina rarely comes from a single catastrophic error. It comes from four Medicaid plans with four rulebooks, a dominant commercial carrier, a coverage gap that pushes balances to patients, and thin billing staff outside the major metros.

01 / Medicaid MCOs

Four Plans, Four Rulebooks

Healthy Connections members are assigned to one of several Medicaid MCOs, and each plan publishes its own authorization lists, filing windows, and claim edit rules. A claim sent to the wrong plan loses weeks before anyone notices.

02 / Coverage Gap

Uninsured and Underinsured Balances

Without Medicaid expansion, many working adults in South Carolina have no coverage or high-deductible marketplace plans. That shifts revenue into self-pay balances that go uncollected when no one owns the follow-up.

03 / Medicare

Palmetto GBA Documentation Denials

Jurisdiction M medical necessity edits and documentation standards drive a steady share of South Carolina Medicare denials. Most are recoverable with a properly documented redetermination, but only if it is filed on time.

04 / Commercial

BlueCross BlueShield Market Weight

BlueCross BlueShield of South Carolina holds the largest commercial share in the state and also operates a Medicaid plan. Contracted rates, network participation, and prior authorization rules all vary by product line.

05 / Dual Eligible

Coordination of Benefits Failures

Members enrolled in both Medicare and Medicaid, including Healthy Connections Prime participants, create primary and secondary payer questions. Billing the wrong payer first produces denials that look like coverage problems but are really sequencing errors.

06 / Staffing

Billing Staff Scarcity Outside the Metros

Experienced billers and certified coders concentrate in Columbia, Charleston, and Greenville. Rural South Carolina practices often run billing with one person who also handles front desk and scheduling tasks.

07 / Chronic Care

Chronic Care and Monitoring Billing

High rates of hypertension, diabetes, and stroke make chronic care management and remote monitoring valuable services. They are also heavily audited, and missing time-tracking documentation turns a payable service into a recoupment.

08 / Credentialing

Enrollment Delays Across Multiple Payers

A new provider may need Palmetto GBA enrollment, Medicaid enrollment, participation with several Medicaid MCOs, and commercial credentialing. Sequential applications can leave a provider unbillable for months.

09 / A/R

Aging Receivables Written Off Early

Small practices frequently write off balances over 90 days because no one has capacity to work them. Much of that A/R is still collectible with payer follow-up, corrected claims, or a timely appeal.

South Carolina Payer Expertise, From Palmetto GBA to Healthy Connections Plans

South Carolina claims move through three distinct payer channels: government programs, contracted Medicaid managed care organizations, and a commercial market led by one Blue plan. ProvidaRCM maintains separate workflows for each.

Government Programs

Medicare and state coverage
MedicareOriginal Medicare Part A and Part B claims for South Carolina process through Palmetto GBA, the Medicare Administrative Contractor for Jurisdiction M, headquartered in Columbia.
Medicare AdvantageMedicare Advantage enrollment continues to grow statewide, led by carriers such as Humana, UnitedHealthcare, and BlueCross BlueShield of South Carolina. These plans follow commercial authorization rules, not Original Medicare rules.
Healthy ConnectionsSouth Carolina's Medicaid program, administered by SCDHHS and delivered primarily through contracted managed care organizations.
Healthy Connections PrimeIntegrated coverage for members dually eligible for Medicare and Medicaid, with different primary payer sequencing than standard Medicaid.
MarketplaceSouth Carolina uses the federally run HealthCare.gov exchange. Qualified health plan claims follow commercial benefit structures, including deductibles and cost sharing.

Medicaid Managed Care

Contracted Healthy Connections MCOs
BlueChoice HealthPlan MedicaidMedicaid plan affiliated with BlueCross BlueShield of South Carolina, serving Healthy Connections members across the state.
Select Health of South CarolinaOperates the First Choice Medicaid plan as part of the AmeriHealth Caritas family of companies.
Molina Healthcare of South CarolinaNational Medicaid managed care organization with a statewide South Carolina plan.
Absolute Total CareCentene subsidiary contracted with SCDHHS for Healthy Connections Medicaid coverage.
Plan AssignmentMembers are assigned to a specific MCO. We verify assignment before every claim, because the plan, not the state, adjudicates the claim and applies its own rules.

Commercial Carriers

Employer and individual market
BlueCross BlueShield of South CarolinaThe dominant commercial carrier in the state, with commercial, Medicare Advantage, and Medicaid product lines. Most South Carolina practices hold network participation here.
UnitedHealthcareCommercial and Medicare Advantage coverage statewide, with plan-specific prior authorization lists and clinical edit rules.
AetnaCommercial and Medicare Advantage membership across South Carolina metros and employer groups.
CignaCommercial employer coverage, frequently with behavioral health benefits administered through a separate vendor that requires its own authorization.
HumanaConcentrated Medicare Advantage presence, with substantial membership in South Carolina's retiree and rural markets.

Network participation, plan names, and authorization requirements change as contracts are awarded and renewed. ProvidaRCM verifies current payer requirements before claims are filed. Requirements vary by payer, plan, and current regulation.

Nine Steps From Patient Registration to Final Payment

Every South Carolina claim follows the same disciplined path. Each step has an owner, a deadline, and a measurable output, so nothing sits unworked.

01

Patient Registration and Coverage Capture

Demographics, insurance, and coordination of benefits details are captured accurately at intake. For Medicaid members this includes confirming which Healthy Connections plan is assigned.

02

Eligibility and Benefit Verification

Coverage is verified before the encounter for Medicare, Healthy Connections plans, and commercial coverage, including deductible, copay, and visit limit detail.

03

Prior Authorization

Authorization requests go to the correct payer, whether that is Palmetto GBA, a Healthy Connections MCO, or a commercial carrier, with complete clinical documentation attached.

Most common delay point: Medicaid MCO and Medicare Advantage authorization queues
04

Charge Capture and Coding

Certified coders assign ICD-10-CM, CPT, and HCPCS codes from the clinical record, with internal audit review for specificity and medical necessity support.

05

Claim Scrub and Submission

Claims are scrubbed against payer-specific edits before transmission, which is where clean claim rates are won or lost. Claims then route to the correct adjudication channel for each payer.

06

Payment Posting and Reconciliation

ERA and EOB payments are posted with contractual adjustments applied, and every payment is reconciled against expected allowable to surface underpayments.

07

Denial Management and Appeals

Denials are categorized by root cause and appealed within each payer's window, with Palmetto GBA redeterminations and Medicaid MCO reconsiderations handled separately.

08

A/R Follow-Up

Aged receivables are stratified by payer, balance, and age bucket, then worked in daily queues so balances are not written off simply because time passed.

09

Reporting and Performance Review

Clean claim rate, denial rate, days in A/R, and net collection rate are reported on a regular cadence, with payer-level detail so problem areas are visible and actionable.

Statewide Medical Billing Coverage for South Carolina Providers

ProvidaRCM supports practices across all four of South Carolina's major regions. Billing operations are centralized and remote, with dedicated account management for every practice.

Upstate

Greenville and Spartanburg metros
  • Greenville
  • Spartanburg
  • Anderson
  • Greer
  • Greenwood
  • Clemson
  • Seneca
  • Union

Midlands

Columbia metro
  • Columbia
  • Lexington
  • Sumter
  • Newberry
  • Camden
  • Orangeburg
  • Aiken
  • Blythewood

Lowcountry

Charleston and Hilton Head
  • Charleston
  • North Charleston
  • Mount Pleasant
  • Summerville
  • Goose Creek
  • Beaufort
  • Hilton Head Island
  • Bluffton

Pee Dee and Grand Strand

Florence and Myrtle Beach
  • Florence
  • Myrtle Beach
  • Conway
  • Rock Hill
  • Georgetown
  • Hartsville
  • Marion
  • Bennettsville

ProvidaRCM operates as a remote RCM partner. We do not maintain physical offices in every city listed. Centralized billing operations support practices statewide with dedicated account management and secure data workflows. See all states we serve.

Practices with locations across the Southeast also ask about our revenue cycle work in North Carolina, Georgia, Tennessee, and Virginia, where the payer mix changes but the operating discipline does not.

The Real Cost of Running South Carolina Billing In-House

Hiring, training, turnover, and software make in-house billing expensive and unpredictable, especially outside the major metros. ProvidaRCM delivers specialty billing expertise at a predictable percentage of collections.

Dimension In-House Billing ProvidaRCM
StaffingSalary, benefits, and coverage for billers who are hard to recruit outside the metrosPredictable percentage of collections with no benefits or overhead
Payer knowledgeLimited to the experience of one or two staff membersTeams working Healthy Connections MCO rules, Palmetto GBA edits, and commercial requirements daily
Medicaid MCO coverageStaff must learn each plan's portal, authorization list, and filing window alonePlan-specific workflows maintained across every contracted Medicaid MCO
TechnologyPractice buys and maintains practice management and clearinghouse systemsWorks inside your existing systems with no new software to purchase
CodingCoding accuracy depends on one person's certification and continuing educationAAPC-certified coders with internal audit review and specialty matching
Denial recoveryAppeals get deprioritized when daily claim volume spikesStructured appeal workflow with payer-specific deadlines tracked to close
ReportingReports pulled manually and often out of dateRegular reporting on clean claims, denials, A/R aging, and collections
ContinuityVacations, illness, and turnover create claim backlogsTeam-based coverage so claims keep moving every business day
ScalabilityAdding a provider means recruiting and training another billerCapacity scales with your volume as providers and locations are added
ComplianceHIPAA and audit readiness depend on internal bandwidthHIPAA-aligned workflows with audit-ready documentation standards

See Exactly Where Your South Carolina Practice Is Losing Revenue

Our free billing assessment reviews your recent claims and shows where money is being left behind, by payer, by reason, and by dollar amount, before you commit to anything.

  • Denial reasons separated by Healthy Connections plan, Palmetto GBA Medicare, and commercial payer
  • Underpayments identified against BlueCross BlueShield of South Carolina and other contracted allowables
  • Aged A/R sorted by payer and age bucket with a recovery priority order
  • Eligibility, plan assignment, and coordination of benefits gaps that delay payment
  • Coding and documentation patterns that trigger medical necessity denials
Request a Free Billing Assessment
2.49%
Starting rate, percent of monthly collections
  • No setup fees
  • No long-term contracts
  • Month-to-month agreement
  • Dedicated account manager
  • Specialty-aligned billing teams

South Carolina Medical Billing Questions, Answered

Straight answers about Healthy Connections Medicaid, Palmetto GBA Medicare, BlueCross BlueShield of South Carolina, and how ProvidaRCM works with practices across the state.

How does ProvidaRCM handle South Carolina Healthy Connections Medicaid billing?+
ProvidaRCM manages the full Healthy Connections lifecycle for South Carolina practices. That includes enrollment with the South Carolina Department of Health and Human Services and each contracted managed care organization, member eligibility checks before every encounter, plan-specific prior authorization, claim submission to the member's assigned plan, and follow-up on every remittance. Because South Carolina Medicaid runs through managed care rather than a single state claims portal, our team tracks each plan's authorization, timely filing, and documentation rules separately and verifies plan assignment before claims go out.
Which South Carolina Medicaid managed care plans do you support?+
We support the Medicaid managed care organizations contracted with South Carolina Healthy Connections, including BlueChoice HealthPlan Medicaid, Select Health of South Carolina, Molina Healthcare of South Carolina, and Absolute Total Care. Plan assignment is verified for every member before a claim is filed. Requirements vary by plan and current state contracts, so our team confirms each plan's authorization lists and filing windows during onboarding and reviews them as contracts change.
How do you handle Medicare billing in South Carolina?+
Original Medicare Part A and Part B claims for South Carolina route through Palmetto GBA, the Medicare Administrative Contractor for Jurisdiction M, headquartered in Columbia. ProvidaRCM works to Palmetto GBA's local coverage determinations, documentation standards, and medical necessity edits, manages advance beneficiary notices where a service may not be covered, and handles redeterminations and appeals when claims are denied.
Has South Carolina expanded Medicaid, and what does that mean for billing?+
No. South Carolina has not expanded Medicaid under the Affordable Care Act, so eligibility remains limited to defined categories such as children, pregnant members, parents below the state threshold, and people with disabilities. For practices, that means a larger share of working adults is uninsured or underinsured, and more revenue lands in self-pay balances and sliding fee scales. ProvidaRCM helps practices collect what is collectible rather than writing those balances off by default.
How long does provider credentialing take in South Carolina?+
Credentialing timelines vary by payer. South Carolina Medicaid managed care enrollment, Palmetto GBA Medicare enrollment, and BlueCross BlueShield of South Carolina commercial participation commonly run 60 to 120 days, and each Medicaid MCO maintains its own application and revalidation cycle. ProvidaRCM starts every application in parallel, keeps CAQH profiles current, and follows up with each payer so new providers become billable as quickly as possible.
Which commercial carriers dominate South Carolina, and how do you handle them?+
BlueCross BlueShield of South Carolina is the dominant commercial carrier in the state and also operates BlueChoice HealthPlan Medicaid. UnitedHealthcare, Aetna, and Cigna hold significant commercial and Medicare Advantage membership, and Humana has a large Medicare Advantage presence in South Carolina retiree and rural markets. ProvidaRCM maintains payer-specific workflows for each, including network participation checks, authorization requirements, and appeal pathways.
What is Healthy Connections Prime, and can you bill it?+
Healthy Connections Prime is South Carolina's program for members who qualify for both Medicare and Medicaid. Members enroll in an integrated plan that coordinates Medicare and Medicaid benefits, so claims and cost sharing are handled differently than standard Medicaid or Original Medicare. ProvidaRCM verifies dual eligibility, confirms which coverage is primary for each service, and bills the correct payer to prevent coordination of benefits denials.
What South Carolina rules affect claims and reimbursement?+
South Carolina maintains a certificate of need program administered by the Department of Public Health, which shapes where certain services and facilities can be added, and state law sets prompt payment expectations for clean claims from licensed insurers. Practices also work within Palmetto GBA's Medicare coverage determinations and each Medicaid MCO's authorization lists. Regulations and contract terms change, so ProvidaRCM verifies current requirements with each payer rather than relying on prior-year guidance.
Do you work with small, independent, and rural South Carolina practices?+
Yes. ProvidaRCM supports solo providers, small groups, and multi-location practices across South Carolina, including rural counties where recruiting an experienced biller is difficult. A large share of the state's 46 counties are rural, and many practices there carry high Medicare and Medicaid volumes. Our percentage-based pricing and month-to-month agreements let small practices access specialty billing expertise and certified coders without building an in-house department.
What is your denial management approach for South Carolina payers?+
Every denial is categorized by root cause, assigned to a specialist, and appealed within payer timelines. South Carolina-specific work includes correcting Medicaid MCO plan assignment and enrollment mismatches, resolving coordination of benefits issues between Medicare and Healthy Connections Prime, appealing Palmetto GBA medical necessity denials, and addressing prior authorization and network denials from BlueCross BlueShield of South Carolina and other commercial carriers.
Which specialties do you support in South Carolina?+
ProvidaRCM supports more than 40 specialties. In South Carolina, our highest-volume specialties include mental and behavioral health, cardiology, orthopedics, chiropractic, gastroenterology, pain management, oncology, and OB/GYN, along with family medicine, internal medicine, pediatrics, physical therapy, and chronic care management programs. Billing teams are matched to the specialty so coders and billers work inside clinical workflows they already know.
How is pricing structured, and how long does onboarding take?+
Pricing starts as low as 2.49 percent of monthly collections, with no setup fees and a month-to-month agreement. Onboarding typically takes two to four weeks depending on practice size, payer mix, and system setup. We handle clearinghouse configuration, payer enrollment, credentialing transfers, and workflow mapping so claims keep moving through the transition.

Recover Lost Revenue Across Your South Carolina Practice

Healthy Connections plans, Palmetto GBA Medicare, and BlueCross BlueShield of South Carolina each demand something different from your billing operation. ProvidaRCM brings the specialty-trained billers, certified coders, and denial specialists to meet all three, without the cost of an in-house department.

What South Carolina Practices Get

  • Specialty-aligned billing teams
  • AAPC-certified coders
  • HIPAA-aligned workflows
  • Medicaid MCO and Medicare payer coverage
  • Dedicated account manager
  • Month-to-month agreement
No setup fees Month-to-month agreement HIPAA-aligned workflows Dedicated account manager AAPC-certified coders South Carolina payer expertise