North Carolina Billing Reference

Medical Billing in North Carolina: Payer Landscape, Medicaid & Timely Filing

North Carolina transformed its Medicaid program from fee-for-service to managed care in 2021 — one of the most disruptive payer transitions in the state’s history. Four Prepaid Health Plans (Aetna Better Health, BCBS of NC, AmeriHealth Caritas, and WellCare) now cover most beneficiaries with different auth and billing rules than the prior FFS system. Timely filing is 12 months.

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Medical Billing in North Carolina: The Short Version

North Carolina moved Medicaid to managed care only in 2021, making it one of the newest managed-Medicaid states — with Standard Plans handling most members and Tailored Plans covering complex behavioral health needs. Blue Cross Blue Shield of North Carolina holds one of the most dominant single-state commercial positions in the country, and the state's Medicaid expansion (December 2023) added hundreds of thousands of newly billable members.

Payer Landscape

Major Payers in North Carolina

Payer	Type	What Billing Teams Should Know
Blue Cross Blue Shield of North Carolina	Commercial / Blue plan	Among the most dominant single-state Blues in the US
UnitedHealthcare	Commercial / MA	Charlotte and Triangle employer book
Aetna	Commercial / MA	State Health Plan administration adds public-employee volume
Cigna	Commercial	Employer self-funded presence
Humana	Medicare Advantage	Growing MA share
NC Medicaid	Medicaid	Standard Plans since 2021; expansion members since Dec 2023

Medicaid Structure

NC Medicaid Managed Care: Managed Care Plans

Administered by the NC Department of Health and Human Services (NCDHHS). The patient's plan assignment — not just Medicaid eligibility — determines the portal, prior-auth list, and filing rules that apply.

Plan	Notes
WellCare of North Carolina (Centene)	Standard Plan, statewide
Healthy Blue (Elevance)	Standard Plan run through BCBS NC partnership
AmeriHealth Caritas North Carolina	Standard Plan, statewide
UnitedHealthcare Community Plan	Standard Plan, statewide
Carolina Complete Health	Provider-led Standard Plan (Centene + NC Medical Society)

Filing Deadlines

Timely Filing Limits for North Carolina Claims

Initial-claim windows for the payers North Carolina practices bill most. Commercial limits are contract-specific — always confirm against your provider agreement and the payer's current manual.

Payer	Timely Filing Limit	Notes
NC Medicaid	365 days from date of service	Managed care plans may set shorter contractual windows — commonly 180 days
Medicare (original)	12 months from date of service	Set by federal law; no contract variation
UnitedHealthcare (commercial)	90 days from date of service	Contract-specific; some plans allow 180
Aetna (commercial)	120 days from date of service	Contract-specific; verify provider agreement
Cigna (commercial)	90 days from date of service	Contract-specific; verify provider agreement
Humana (commercial)	90 days from date of service	Among the strictest; Medicare Advantage differs

Verified against payer publications at time of writing (July 2026). Filing limits change by contract and plan year — treat this table as a starting point, not a substitute for the payer manual. See our methodology.

NC-Specific Rules

North Carolina Billing Realities to Know

Young Managed Care Program

NC managed Medicaid launched in 2021 — plan behaviors, PA lists, and payment edits are still stabilizing, and policy bulletins arrive frequently.

Medicaid Expansion Wave

Expansion coverage (Dec 2023) added a large newly insured population; eligibility churn between expansion and marketplace coverage makes real-time verification essential.

BCBS NC Gravity

With BCBS NC’s market share, its policy and edit changes function as de facto state billing rules.

Tailored Plan Complexity

Behavioral health providers deal with Tailored Plans and LME/MCO history — a separate authorization world from Standard Plans.

Frequently Asked Questions

NC Medicaid Managed Care allows 365 days from date of service for initial claims, administered by the NC Department of Health and Human Services (NCDHHS). Managed care plans operating in North Carolina may apply shorter contractual windows, so always verify each plan's provider manual.

WellCare of North Carolina (Centene), Healthy Blue (Elevance), AmeriHealth Caritas North Carolina, UnitedHealthcare Community Plan, Carolina Complete Health. Each plan maintains its own provider portal, prior authorization list, and claim submission rules — the patient's plan assignment, not just Medicaid status, determines how a claim must be billed.

Blue Cross Blue Shield of North Carolina, UnitedHealthcare, Aetna, Cigna, Humana, alongside Medicare and NC Medicaid Managed Care. See the payer landscape table on this page for what billing teams should know about each.

NC Medicaid shifted from a predominantly fee-for-service model to managed care in 2021 under the NC Medicaid Transformation. Most members are now enrolled in a PHP (Prepaid Health Plan) — Aetna Better Health of NC, Healthy Blue (Elevance), UnitedHealthcare Community Plan, WellCare of NC, and AmeriHealth Caritas NC. Behavioral health, long-term care, and certain waiver populations remain on NC Medicaid Direct (fee-for-service billed to the state). The patient's program type — not just Medicaid eligibility — determines whether you bill the PHP or the state directly. A patient enrolled in a PHP but receiving a covered waiver service may still bill NC Medicaid Direct for that specific service; verify program enrollment before submitting.

Code Reference

Common Codes Billed in This State

Frequently billed codes in this state’s payer environment, with notes on state-specific rules and common denial patterns.

Code	Description	State-Specific Note
99213	Office visit, est. patient — level 3	Post-2021 transition: bill to PHP (Prepaid Health Plan), not NC DHHS
99214	Office visit, est. patient — level 4	BCBS of NC holds largest PHP enrollment; verify member’s plan
99215	Office visit, est. patient — level 5	FFS providers who didn’t transition to PHPs face credentialing gaps
Mod. GT	Telehealth — real-time audio/video	NC Medicaid allows; each PHP handles auth separately
H2019	Therapeutic behavioral services	High demand under all 4 PHPs; behavioral health carved in
CO-4	Service billed to wrong payer / untimely	Transition confusion: many claims still misdirected post-2021

Codes and reimbursement rates change annually. Verify current fee schedules with each payer before billing. Full code lookup →