Chiropractic insurance billing in North Carolina.

Medicare’s chiropractic rules are federal — the same in every state. Medicare Part B covers ONLY manual manipulation of the spine to correct a subluxation (CPT 98940–98942), and ONLY when the care is active or corrective — which you signal with the AT modifier. Maintenance care, exams, X-rays, and any therapies performed by a chiropractor are not covered, so a properly executed ABN is essential before non-covered services. The full federal rules are in our chiropractic Medicare billing guide.

Part B claims in North Carolina are processed by Palmetto GBA (JM) — its Local Coverage Determination and documentation expectations (and its audits of the AT modifier and medical necessity) are the ones your North Carolina claims are measured against.

A North Carolina chiropractic or multi-specialty practice spends most of its commercial billing day with: Blue Cross and Blue Shield of North Carolina; UnitedHealthcare; Aetna (CVS Health); Cigna Healthcare; Centene/Ambetter; AmeriHealth Caritas.

Each has its own claim portal, fee schedule, and chiropractic medical-policy quirks.

North Carolina chiropractic claims and prior-authorization do NOT all route to one vendor – delegation varies by payer and line of business, so check the member ID card and the payer portal each time. UnitedHealthcare manages chiropractic/PT/OT through Optum (Optum Physical Health, the former OptumHealth Care Solutions network); for UHC Medicare Advantage, prior authorization for chiropractic treatment plans is required and is submitted via the UnitedHealthcare Provider Portal/Optum (an initial evaluation plus up to six follow-up visits within eight weeks may proceed without clinical review, but care plans beyond that need medical-necessity review).

American Specialty Health (ASH) is a national delegated chiropractic/acupuncture/PT manager that, in North Carolina, is most relevant for certain Cigna members (Cigna uses national ancillary vendors such as ASH or OrthoNet for chiropractic/PT predetermination/precertification in some plans) – verify on the specific Cigna plan.

Blue Cross NC does NOT delegate chiropractic to ASH; for its Commercial fully insured (and electing ASO) plans it runs a rehabilitation/musculoskeletal prior-authorization program through Carelon Medical Benefits Management (formerly AIM) – effective late 2024 and expanded July 1, 2025 – so PT and rehab authorizations route to Carelon, while chiropractic medical policy is administered by Blue Cross NC directly.

Humana generally does NOT require chiropractic prior authorization in North Carolina (its chiro PA delegation, e.g., Tivity/ASH, applies in other markets like Southern Florida and Southern California). NC Medicaid managed care chiropractic is handled by each prepaid health plan (Healthy Blue, AmeriHealth Caritas NC, UnitedHealthcare Community Plan, WellCare of NC;

Carolina Complete Health merged into WellCare in 2026), not a single statewide vendor. Bottom line: route UHC chiro to Optum, some Cigna chiro to ASH/OrthoNet, Blue Cross NC rehab/PT auth to Carelon, and confirm everything on the ID card.

North Carolina has a chiropractic equal-coverage mandate: N.C. Gen. Stat. 58-50-30 (with 58-3-235 ‘any willing provider’ rules) bars a plan from imposing limitations on covered, medically necessary care performed by a licensed chiropractor (scope per N.C. Gen. Stat. 90-151, Article 8) unless a comparable limit applies to the same service by other physicians – it equalizes treatment, but does NOT force a stand-alone chiropractic benefit or override visit caps/medical-necessity rules. What actually trips up chiropractic billing here:

• Medical necessity and treatment plans – Blue Cross NC (the dominant commercial carrier) covers chiropractic only for an active condition expected to improve, requires a documented treatment plan (diagnosis, modalities, goals, anticipated length), limits E/M to about once a month absent a documented significant change, caps therapeutic modalities at 4 units/about one hour per session, and excludes maintenance/supportive care and items it deems investigational (cold/low-level laser, kinesiology taping, dry hydrotherapy).
• Prior auth quirks – Blue Cross NC routes PT/rehab authorizations to Carelon; UHC/Optum requires authorization for chiropractic treatment plans beyond the initial visits.
• Modifier discipline – for Medicare and payers mirroring it, the AT modifier must be on spinal CMT codes 98940-98942 for active/corrective care (no AT = treated as non-covered maintenance and denied), and Original Medicare covers ONLY manual spinal manipulation by a DC (98940-98942) – never the exam, x-rays, or therapy services; re-evaluate roughly every 12 visits to support continued necessity.
• E/M with CMT – append modifier 25 to a separately identifiable, separately documented E/M billed the same day as manipulation, or expect a denial/bundling edit.
• Medicaid visit cap – chiropractic is an OPTIONAL Medicaid service; combined optional services (chiropractic/podiatry/optometry) are limited to 8 visits per member per state fiscal year (July 1-June 30) under 42 CFR 440.225 unless a managed-care plan adds value-added coverage (e.g., WellCare of NC has offered expanded chiropractic for adults 21+). Verify benefits, the managing vendor, visit caps, and treatment-plan/auth requirements before treating.

Largely contract/payer-set, but North Carolina law puts a FLOOR under it: under the state’s prompt-pay statute (N.C. Gen. Stat. 58-3-225(f)), an insurer ‘may not limit the time in which claims may be submitted to fewer than 180 days,’ and even a late claim is not invalidated if it was not reasonably possible to file on time (with a one-year outer limit absent legal incapacity).

So in practice the dominant North Carolina commercial carriers (e.g., Blue Cross NC, Aetna, Cigna, UnitedHealthcare) typically set initial timely-filing windows in the 90-180 day range, and 180 days is the most common/safe expectation in North Carolina because of the statutory minimum – but the exact number is per the payer/plan contract (self-funded ERISA plans are not bound by 58-3-225, so confirm those separately).

North Carolina’s prompt-pay rules also require the insurer to PAY or formally respond to a clean claim within 30 calendar days, with 18% annual interest on claims not paid on time (N.C. Gen. Stat. 58-3-225(b),(e)); those govern payment speed, not the provider’s filing deadline.

Always confirm the exact limit in the specific payer/plan contract.

12 months (one calendar year) from the date of service. This is the federal Medicare limit under 42 CFR 424.44 / Section 1842(b)(3)(B) of the Social Security Act and applies in North Carolina the same as nationwide. North Carolina’s A/B Medicare Administrative Contractor is Palmetto GBA (Jurisdiction M, Part A and Part B).

Claims filed after one year are denied for untimeliness with no appeal rights on the timeliness denial (narrow exceptions apply, e.g., retroactive Medicare entitlement).

Fee-for-service (NC Medicaid Direct via NCTracks): generally 365 days from the FIRST date of service for professional/non-institutional claims (hospital inpatient and nursing-facility claims run 365 days from the LAST date of service).

Claims originally filed within 365 days may be refiled/adjusted for up to 18 months from the last Remittance Advice date. NC Medicaid MANAGED CARE (Standard Plans / prepaid health plans such as Healthy Blue, AmeriHealth Caritas NC, UnitedHealthcare Community Plan, WellCare of NC) generally requires medical claims within 180 calendar days of the date of service or discharge (pharmacy point-of-sale: 365 days).

For Medicare/third-party (TPL) crossover claims, file to NC Medicaid within 180 days of the Medicare/other-payer EOB posting date, regardless of the service date and whether the other payer paid or denied. Confirm the exact window with the specific health plan, since managed-care plans set their own contractual deadlines within state guidance.

75 days from the date the service was rendered for a provider to submit its medical bill/statement to the employer/carrier/administrator (NOT to the Industrial Commission), or, for ongoing/multiple treatments, within 30 days after the end of the month in which the treatments were provided – North Carolina Industrial Commission Workers’ Compensation Rule 04 NCAC 10J .0103 (formerly Rule 407), Fees for Medical Compensation.

If liability was initially denied and later admitted or determined by the Commission, the clock runs from when the provider received notice of the admission/determination of liability. The carrier must then pay, object in writing, or submit the bill to the Commission within 30 days of receipt; a 10% late penalty can attach to approved bills not paid within 60 days.

Submit bills promptly to the authorized payer to preserve payment rights.

North Carolina is an at-fault (tort) state and does NOT have statutory no-fault Personal Injury Protection (PIP); first-party auto medical coverage is optional Medical Payments (MedPay) added to the policy. There is NO fixed statutory days-from-service deadline to submit a MedPay bill – the deadline is set by the auto POLICY, which typically requires prompt notice of the accident and timely ‘proof of loss’ (itemized bills/records), so submit as soon as possible and follow the policy’s notice/proof-of-loss terms.

Practically, bill the patient’s health insurer or MedPay promptly and, where a third-party liability (bodily-injury) claim is involved, preserve the claim within North Carolina’s 3-year personal-injury statute of limitations (N.C.

Gen. Stat. 1-52); a denied MedPay/insurance benefit is a contract claim also subject to a 3-year limit. There is no single ‘bill submission’ deadline for auto here – it is contractual, so verify each policy.