Chiropractic insurance billing in Ohio.

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 Ohio are processed by CGS Administrators (J15) — its Local Coverage Determination and documentation expectations (and its audits of the AT modifier and medical necessity) are the ones your Ohio claims are measured against.

A Ohio chiropractic or multi-specialty practice spends most of its commercial billing day with: Medical Mutual of Ohio; Anthem Blue Cross Blue Shield (Elevance); UnitedHealthcare; Aetna (CVS Health); Cigna; Humana. Each has its own claim portal, fee schedule, and chiropractic medical-policy quirks.

Ohio chiropractic and physical-medicine benefits are frequently DELEGATED to a specialty network manager rather than handled by the health plan directly, which changes where enrollment, prior auth/treatment plans, and claims must go. The two dominant managers operating in Ohio:

• American Specialty Health (ASH / ashlink.com) — Ohio is a longstanding ASH market. ASH is Cigna’s delegated administrator for chiropractic and acupuncture (network management, credentialing, utilization/medical-necessity review, and claims processing) for Cigna members in Ohio, and ASH also administers chiropractic/acupuncture benefits for various Anthem Blue Cross Blue Shield (Elevance) lines — Anthem’s own rider language states members get up to 30 chiropractic-plus-acupuncture visits/year ‘determined by ASH Plans to be medically/clinically necessary.’ ASH also contracts with other regional/national plans (e.g., Aetna, Health Net) in markets where carved out. When a plan is carved out to ASH, enrollment, treatment-plan/medical-necessity review, prior auth, and CLAIMS route to ASH — not the health plan.
• Optum / Optum Physical Health (a UnitedHealth Group company) manages chiropractic and outpatient-therapy benefits for UnitedHealthcare. Notably, effective September 1, 2024 UnitedHealthcare requires prior authorization — delegated to Optum, reviewed under CMS Chapter 15 / applicable LCDs / InterQual — for Medicare-covered chiropractic (spinal manipulation) and outpatient PT/OT/ST for Medicare Advantage members in Ohio and other states; routine/maintenance chiropractic and the initial evaluation are exempt, but the ongoing treatment plan needs auth. Separately, Anthem and other Ohio plans use Carelon Medical Benefits Management (formerly AIM) for some rehabilitation/physical-medicine and site-of-care utilization review. ALWAYS verify on the member’s card/portal whether chiropractic is carved out to ASH or Optum (and to which entity) — misrouting an auth or claim to the health plan instead of the delegate is a leading Ohio denial cause.

What actually trips up chiropractic billing in Ohio:

• Carve-out routing — because Cigna (and various Anthem lines) run chiropractic through ASH and UnitedHealthcare runs it through Optum, sending the claim or auth to the health plan instead of the delegated administrator is the single most common denial. Confirm the delegate before submitting.
• Visit caps + treatment-plan/medical-necessity gating — Anthem commercial chiropractic (via ASH) commonly caps at 30 visits/year combined with acupuncture, and only services ASH approves as medically necessary are covered (an initial new-patient exam by an in-network chiropractor is typically allowed without pre-approval). Medical Mutual of Ohio (a major Ohio-based commercial payer) commonly limits chiropractic to ~20 visits per calendar year, bundles modalities/therapeutic procedures into the office-visit/CMT payment, and treats CMT codes 98940-98943 as the primary covered procedure. ASH/Optum front-load clinical documentation: initial treatment plan, periodic re-evaluation, and a clear active/corrective-care vs. non-covered ‘maintenance care’ distinction.
• Ohio Medicaid limits — ODM fee-for-service covers chiropractic narrowly under OAC 5160-8-11: one spinal manipulation per date of service; X-ray/imaging only to confirm subluxation (entire-spine imaging max 2 sessions/benefit year, other imaging 2 sessions/6 months); E/M limited to 4 sessions/benefit year; and an overall outpatient cap of 15 dates of service per benefit year for members 21+ (30 for members under 21). Subluxation must be documented (imaging or exam findings of asymmetry/misalignment plus pain or soft-tissue change), and care without a clearly defined goal is excluded. Confirm each Medicaid managed-care plan’s own rules.
• Modifiers/pre-auth quirks — expect the AT (active treatment) modifier on Medicare/Medicare-Advantage spinal CMT (98940-98942), correct GA/GZ and -59/-XU usage for distinct services, and remember UHC/Optum MA now requires prior auth for Medicare-covered manipulation (routine maintenance excluded, initial eval exempt).
• No broad commercial chiropractic mandate — Ohio does not impose a sweeping statutory commercial chiropractic-benefit mandate; chiropractic is typically an optional/rider benefit, so coverage and caps are plan-by-plan (Ohio law does, however, bar discrimination against chiropractors for services within their licensed scope where the benefit is covered — R.C. 1751.66 for HMOs / 3923.41-related provisions). Not legal advice — verify benefits and current rules per payer.

Largely contract/payer-set — Ohio does NOT impose a single statutory provider claim-submission deadline for commercial/private plans. The initial-filing window is fixed by your participating-provider agreement or the payer’s provider manual, and in Ohio the common range runs roughly 90 to 180 days from the date of service (some PPO/indemnity contracts allow up to 12 months; several Ohio payers and their delegated networks use 90 or 180 days).

Confirm the exact number in your contract before relying on it. Ohio prompt-pay / clean-claim context (how fast the PLAN must pay YOU, not your submission deadline): under Ohio’s Prompt Pay Act, R.C. 3901.381 and the related sections 3901.38-3901.3814, a third-party payer must pay or deny a claim submitted on the standard claim form within 30 days of receipt; if a clean claim is not paid within 30 days the payer owes interest at 18% per annum (R.C. 3901.381(B)/(C)), and the payer generally has 30 days to request additional information.

These prompt-pay rules govern the PAYER’S timeline, not the provider’s filing deadline. As of 2025-2026; verify per payer and contract.

Federal limit: generally 12 months (one calendar year) from the date of service to submit an initial Medicare fee-for-service claim. Set by the Social Security Act (1842(b)(3)) / 42 U.S.C. 1395u and 42 CFR 424.44, and enforced by CMS — not by Ohio.

A claim for a service on, e.g., July 1, 2025 must be received by July 1, 2026 or it is denied as untimely (denial is not an appealable initial determination). Narrow CMS exceptions exist (administrative error, retroactive Medicaid/eligibility, certain disasters).

Medicare Advantage plans set their own deadlines (often similar, up to ~12 months) — confirm per plan.

Ohio Medicaid (ODM): the timely-filing limit is 365 days (one year) from the actual date the service was provided — ‘Claims are timely if received by ODM within three hundred sixty-five days of the actual date the service was provided’ (Ohio Administrative Code 5160-1-19).

Key carve-outs in the same rule: claims submitted via the automatic Medicare crossover process are NOT subject to this timely-filing provision; FQHC/RHC wraparound, eligibility-determination delays, and third-party reversals generally allow 180 days from the triggering event; and ODM may reimburse beyond 365 days for ODM-caused delays.

Claims paid after the 365-day window remain subject to post-payment review. Ohio Medicaid MANAGED-CARE plans (most members — e.g., CareSource, Anthem, Buckeye, Molina, UnitedHealthcare, AmeriHealth Caritas, Humana) follow ODM’s timely-filing framework but confirm each plan’s specifics; note ODM’s transition to the centralized ‘Next Generation’ claims/EDI system changed some submission mechanics, so verify current routing.

Ohio Workers’ Comp (BWC): a provider must submit its fee bill within ONE YEAR of the date the service was rendered — or one year after the date the services became payable under R.C. 4123.511(I), whichever is later — ‘or shall be forever barred’ (Ohio Administrative Code 4123-3-23, for dates of service on or after July 29, 2011).

Missing this window legally bars payment, and a late bill cannot be balance-billed to the injured worker for an allowed condition. Requests for ADDITIONAL payment on a fee bill that was initially timely submitted must be made within one year and seven days of the BWC’s adjudication of the initial bill.

Limited exceptions: bills late due to MCO or BWC error, and certain VA reimbursement requests under 38 U.S.C. 1729. Most Ohio WC medical care is managed through a BWC-certified Managed Care Organization (MCO) — submit per the MCO’s instructions and within the one-year statutory window.

Ohio is an at-fault (tort) state with NO no-fault/PIP system — first-party Medical Payments (MedPay) coverage is optional and purely contractual. There is NO fixed Ohio statutory deadline to submit medical bills to an auto carrier; any bill-submission or notice timeframe is set by the individual auto policy (MedPay policies typically require prompt/reasonable notice and proof of claim, and many expect bills for treatment within roughly 1-3 years) — submit promptly per policy terms.

Practical norms: bill MedPay and/or the patient’s health insurance promptly to preserve coverage, and on a lien/third-party-liability basis bills are typically presented at settlement. The underlying third-party (liability) bodily-injury claim is bound by Ohio’s 2-year personal-injury statute of limitations (R.C. 2305.10).

Confirm each MedPay policy’s notice/proof-of-loss terms.