Chiropractic insurance billing in Missouri.

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 Missouri are processed by WPS Government Health Administrators (J5) — its Local Coverage Determination and documentation expectations (and its audits of the AT modifier and medical necessity) are the ones your Missouri claims are measured against.

A Missouri chiropractic or multi-specialty practice spends most of its commercial billing day with: Anthem Blue Cross Blue Shield (Elevance); Blue Cross and Blue Shield of Kansas City (Blue KC); UnitedHealthcare; Cigna; Aetna; Centene / Ambetter from Home State Health.

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

Missouri is a partially ‘carved-out’ chiropractic market — some large plans delegate chiropractic/physical-medicine benefits to a specialty network manager (which changes where credentialing, prior auth/treatment plans, and CLAIMS go), while others administer chiropractic directly. The managers that matter:

• American Specialty Health (ASH / ashlink.com) — ASH is the nation’s largest specialty-network manager for chiropractic/PT/OT/acupuncture and works with Aetna, Anthem BlueCross BlueShield, Cigna, and Health Net. Cigna expanded its ASH delegation INTO MISSOURI as part of its rollout beginning September 1, 2023 (Missouri was explicitly named in the new-market list alongside AK, AR, CO, MS, OK, TN, WY). When a plan is carved out to ASH, network enrollment, treatment-plan/medical-necessity review, prior auth, and claims route to ASH via ASHLink — NOT to the health plan — and ASH imposes its own utilization gates (medical-necessity review forms; pre-authorization after an initial visit block). Anthem BCBS (RightCHOICE), the dominant Missouri Blues plan across most of the state, has historically delegated chiropractic utilization/network to ASH for many products — verify per member, because Anthem’s broader musculoskeletal/PT site-of-care reviews are managed by Carelon (formerly AIM Specialty Health), a separate Anthem vendor.
• Optum / Optum Physical Health (a UnitedHealth Group company) — manages UnitedHealthcare’s chiropractic/physical-health utilization; effective September 1, 2024, UHC requires prior authorization (delegated to Optum Physical Health, reviewed under CMS Ch. 15 / LCDs / InterQual) for chiropractic and outpatient therapy for Medicare Advantage members — the initial evaluation is exempt, but the treatment plan/number of visits needs auth. NOTE: the Kansas City metro split matters — in ~30 KC-area counties, members are served by Blue Cross and Blue Shield of Kansas City (Blue KC), a separate Blues licensee with its own chiropractic policies, NOT Anthem/RightCHOICE. ALWAYS verify on the member’s card/portal whether chiropractic is carved out to ASH or Optum (and to which entity) before submitting — misrouting a carved-out claim to the health plan instead of the delegate is a leading Missouri denial cause.

What actually trips up chiropractic billing in Missouri:

• Missouri HAS a statutory chiropractic mandate — unlike many states, RSMo 376.1230 requires every health-carrier policy (with carve-outs for individually underwritten, Medicaid, and supplemental/limited policies) to cover medically necessary chiropractic care delivered by a licensed DC, with access to a total of 26 chiropractic physician office visits per policy period (the carrier MAY require notice before any visit beyond 26 as a condition of coverage). It also imposes PARITY: a plan may not set any rate, term, or condition that places a greater financial burden on chiropractic-condition treatment than on other physical-health conditions. Separately, RSMo 376.391 caps the chiropractic co-payment at no more than 50% of the total cost of any single chiropractic service. Know these — they are leverage when a Missouri commercial plan tries to under-cover chiropractic.
• Routing / carve-out confusion — Cigna chiropractic runs through ASH (ASHLink as of the 9/1/2023 Missouri expansion); Anthem/RightCHOICE has historically delegated chiropractic to ASH (verify per member); UnitedHealthcare runs chiropractic utilization through Optum Physical Health; and Blue KC (Kansas City metro) administers its own. Sending an ASH/Optum claim or auth to the health plan (or vice-versa) is a common denial — confirm the delegate per member before submitting.
• Short Anthem filing window — Anthem’s ~90-day commercial/MA professional filing deadline is unforgiving relative to the 180-day norm elsewhere; build workflows to file Anthem claims fast.
• E/M-with-manipulation bundling — most payers treat CMT (98940-98943) as INCLUDING a brief pre-manipulation assessment, so a same-day office/outpatient E/M (99202-99215) is generally bundled unless it is a separately identifiable service (new patient, new injury, exacerbation, or a periodic re-evaluation) — use modifier -25 appropriately or expect the E/M to be denied/bundled.
• ASH/Optum treatment-plan gating — carved-out plans front-load clinical documentation: an initial treatment plan, periodic re-evaluation, and a clear active/corrective-vs-maintenance distinction (maintenance care is non-covered); ASH typically requires a medical-necessity review form and pre-auth after an initial visit block, and Optum applies InterQual/CMS Ch. 15 review for UHC MA.
• Medicare/MA modifiers + prior auth — expect the AT (active treatment) modifier on Medicare/MA spinal CMT (98940-98942), correct GA/GY/GZ and -59/-XU usage; Medicare covers ONLY manual spinal manipulation by a chiropractor (no exams, x-rays, or therapies billable to Part B), and UHC/Optum MA now requires prior auth for the chiropractic treatment plan (initial eval exempt).
• Medicaid scope — MO HealthNet covers chiropractic narrowly (13 CSR 70-3.310; limited manipulation benefit, and the 376.1230 mandate explicitly does NOT apply to Medicaid); verify the MO HealthNet managed-care plan’s chiropractic benefit and any visit limits before treating. Verify benefits and current rules per payer. Not legal advice.

Largely contract/payer-set — Missouri has no statute that fixes a minimum INITIAL-claim submission window for commercial/private payers, so the deadline is whatever the participating-provider agreement or payer manual specifies. The common range runs roughly 90-180 days from the date of service, but Missouri’s dominant commercial payer skews SHORT:

Anthem Blue Cross and Blue Shield (the trade name for RightCHOICE Managed Care across most of Missouri, except ~30 counties in the Kansas City metro served by Blue Cross and Blue Shield of Kansas City / Blue KC) generally requires commercial and Medicare Advantage professional claims within 90 days of the date of service unless the provider contract states otherwise.

Other Missouri commercial payers commonly run 90-180 days in-network and up to 12 months for some plans — always confirm the exact window in your contract/manual. Missouri prompt-pay/clean-claim context (how fast the PLAN must pay YOU, not your submission deadline): under RSMo 376.383-376.384, a health carrier/insurer must pay or deny a CLEAN claim within 45 days of receipt (or, if more information is needed, send a request specifying all needed documentation); claims not paid within 45 days accrue a penalty of 1% per day of the outstanding amount, and carriers must properly process/pay 95% of claims to be deemed compliant.

That law sets the carrier’s PAYMENT clock, not the provider’s SUBMISSION deadline, which remains contractual. 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 (Section 1842(b)(3)(B)) and CMS, not by Missouri. Medicare Advantage plans set their own deadlines (often similar, up to ~12 months — Anthem MA, for example, runs as short as 90 days for professional claims) — confirm per plan.

Note: for chiropractic, Medicare/MA covers ONLY manual spinal manipulation (CPT 98940-98942) with the AT modifier for active/corrective care; effective September 1, 2024, UnitedHealthcare/Optum Medicare Advantage plans require prior authorization for the chiropractic (and outpatient PT/OT/ST) treatment plan — the initial evaluation is exempt.

See networks and payerNuance.

MO HealthNet (Missouri Medicaid): the INITIAL claim must be filed by the provider and received by the state agency/fiscal agent within 12 months (one year) from the date of service, per 13 CSR 70-3.100 (Filing of Claims, MO HealthNet Program).

Claims originally filed and received within 12 months but denied or returned to the provider may be RESUBMITTED and received within 24 months of the date of service — each resubmission filed beyond the 12-month limit must have documentation attached showing it was originally filed within 12 months (remittance advices, return-to-provider letters, claim confirmation reports, or MO HealthNet Division letters serve as proof; use the Timely Filing tab to attach it).

Adjustments to a PAID claim must be filed within 24 months from the date of service (also stated by MHD as 24 months from the remittance-advice payment date). MO HealthNet MANAGED-CARE plans (e.g., Healthy Blue, Home State Health, United Healthcare Community Plan) set their own timely-filing windows in their provider agreements — commonly 365 days/12 months but sometimes shorter — so confirm with the specific MCO.

Missouri Workers’ Comp (RSMo Chapter 287) does NOT set a fixed statutory deadline for a provider to SUBMIT its initial medical bill — there is no hard timely-filing cutoff for WC medical bills the way there is for Medicaid/Medicare.

Missouri also has NO mandatory WC medical FEE SCHEDULE: under RSMo 287.140.3, a provider may not charge more than the usual and customary fee it receives for the same service from a private individual or private health insurance carrier, with fees subject to regulation by the Division/Commission.

The hard deadline in Missouri WC is on the DISPUTE side, and it is easy to miss: for services rendered after July 1, 2013, a provider who wants to contest an underpayment must file an Application for Payment of Additional Reimbursement (medical fee dispute) with the Division within ONE YEAR from the date the provider received the first notice that the medical charge was disputed (RSMo 287.140.4; procedure at 8 CSR 50-2.030) — and that notice is presumed received no later than 5 business days after transmission by certified mail.

Miss that one-year window and the fee dispute is denied. PRACTICAL norm: submit bills promptly; payment ultimately depends on compensability of the underlying claim, and statutes of limitation on collecting fees are tolled while a noncompensability determination is pending (RSMo 287.140.13).

Confirm each carrier/TPA’s billing instructions; not legal advice.

Missouri is an at-fault (tort) state with NO no-fault/PIP system — PIP is not required or standard. The optional first-party medical coverage is MedPay (Medical Payments Coverage), which is purely contractual. There is NO fixed Missouri statutory deadline to submit medical bills to an auto carrier; any bill-submission/notice timeframe is set by the individual auto policy (MedPay policies typically require prompt/reasonable notice and submission of bills per policy terms) — submit promptly per the policy.

Practical norms: bill MedPay and/or the patient’s health insurance promptly to preserve coverage; the underlying third-party (liability) personal-injury claim is governed by Missouri’s FIVE-year personal-injury statute of limitations (RSMo 516.120) — one of the longest in the country — so on a lien/third-party-liability basis, bills are commonly presented at settlement within that window.

(For a wrongful-death action the SOL is 3 years, RSMo 537.100.) Confirm each MedPay policy’s notice/submission terms.