Chiropractic insurance billing in Mississippi.

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 Mississippi are processed by Novitas Solutions (JH) — its Local Coverage Determination and documentation expectations (and its audits of the AT modifier and medical necessity) are the ones your Mississippi claims are measured against.

A Mississippi chiropractic or multi-specialty practice spends most of its commercial billing day with: Blue Cross & Blue Shield of Mississippi; Ambetter from Magnolia Health (Centene); UnitedHealthcare; Cigna; Molina Healthcare;

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

Chiropractic and physical-medicine benefits in Mississippi are increasingly administered through delegated musculoskeletal / physical-health network managers, which changes WHERE claims, authorizations and treatment plans go. The dominant managers present in Mississippi are:

• American Specialty Health (ASH / ASHLink) – notably, Cigna Healthcare delegated chiropractic, acupuncture and outpatient PT/OT/SLP to ASH in Mississippi as part of an expansion effective Sept. 1, 2023 (Mississippi was named among the newly added states), so for Cigna members chiropractic credentialing, prior authorization, utilization/medical-necessity review and claims route to ASH rather than to Cigna directly; ASH also administers chiropractic/specialty networks for various Aetna and Anthem/Blue products nationally.
• Optum Health / Optum Physical Health (formerly ACN Group) – UnitedHealthcare delegates the initial authorization and concurrent review of outpatient therapy and chiropractic to Optum; in Mississippi (policy updates effective Jan. 1, 2025 and Jan. 1, 2026), UnitedHealthcare/Optum requires prior authorization for the chiropractic/therapy TREATMENT PLAN (the number of visits) – NOT the initial evaluation – submitted through the UHC Provider Portal and managed in Optum systems, and for new requests on/after Jan. 13, 2025 allows up to six initial-plan-of-care visits within eight weeks before clinical review (note UHC announced in 2026 it will eliminate PA for ~30% of services, including some chiropractic, by end of 2026). Blue Cross & Blue Shield of Mississippi (the dominant in-state commercial payer and the administrator of the State and School Employees’ Health Insurance Plan) generally administers its OWN chiropractic/physical-medicine benefit and prior-authorization (via myAccessBlue) rather than delegating chiropractic to ASH. ALWAYS verify on the member’s card / via eligibility whether chiropractic is delegated to ASH (Cigna) or Optum (UHC) or handled by the health plan (BCBSMS) BEFORE sending the claim or authorization – misrouting is a top denial cause. (Delegation arrangements change by plan and year; confirm per member.)

What trips up chiropractic billing in Mississippi:

• Auth routing/delegation is the biggest current pitfall – Cigna chiropractic now flows through ASH (since Sept. 1, 2023) and UnitedHealthcare chiropractic flows through Optum (treatment-plan PA via the UHC portal), so a treatment plan or visit authorization sent to the health plan instead of the delegated vendor draws a ‘no authorization’ denial; BCBSMS, by contrast, manages chiropractic in-house.
• Visit caps and benefit limits live in the member contract, not one published policy – many Mississippi commercial plans cap chiropractic/spinal-manipulation visits per benefit year (commonly in the ~12-20 range; the BCBS Federal Employee Program sold in Mississippi caps manipulation at 12 visits Standard / 20 Basic per year as a reference point), and some aggregate chiropractic with PT/OT into a combined annual limit – verify benefits per member before treating.
• Medical-necessity / treatment-plan documentation is heavily enforced by ASH and Optum: a documented plan of care (diagnosis, functional goals, frequency, duration), active/corrective care, and periodic re-evaluation/authorization are required, and maintenance care that shows no functional improvement is routinely denied.
• Modifier discipline: Medicare and most commercial plans require the AT modifier on active/corrective spinal CMT (98940-98942); Medicare covers ONLY spinal CMT by a DC (exams, x-rays, and therapies by a chiropractor are excluded and need GY/ABN handling).
• Mississippi has a chiropractic FREEDOM-OF-CHOICE / non-discrimination statute (Miss. Code Ann. Sec. 83-41-215): when a policy covers a service within a chiropractor’s lawful scope, the insured is entitled to reimbursement for that service performed by a licensed DC and may choose the chiropractor and the (in-office) place of service – but this is an anti-discrimination/parity provision, NOT a mandate that every plan cover chiropractic, so always verify the actual benefit.
• Mississippi Medicaid DOES cover chiropractic as a medically-necessary professional service (added by State Plan Amendment SPA 22-0013, CMS-approved Nov. 4, 2022; reimbursed at 70% of the Medicare rate in effect Jan. 1, 2022 and adjusted each July) – a notable contrast with several neighboring states that restrict Medicaid chiropractic to EPSDT/children – but confirm covered codes, any visit limits and documentation rules in Admin. Code Title 23 and the current fee schedule, and note the MississippiCAN/CHIP managed-care plans (Magnolia, Molina, TrueCare) administer their own chiropractic benefit and auth rules. (Plan-specific caps, criteria, delegation and Medicaid managed-care benefits change yearly – verify per member/plan; this is general guidance, not legal advice.)

No Mississippi statute fixes a single provider INITIAL-claim filing window for commercial/private plans; the initial filing deadline is set by each payer’s provider contract and must be confirmed per payer and product. The common contractual range nationally and in Mississippi is roughly 90-180 days from the date of service (some plans allow up to 12 months) – verify the exact limit in each payer agreement/manual. Two pieces of Mississippi statutory context matter:

• Miss. Code Ann. Sec. 83-41-219 (‘reciprocal time limitations’) does NOT impose a fixed filing deadline – instead, if a payer limits the time a provider has to submit a claim, the payer gets that SAME period after payment to audit/recoup; and if the payer sets NO filing limit, it may not recoup an invalid/overpaid claim more than 12 months after payment (Medicaid claim audits are limited to 5 years).
• Mississippi’s prompt-pay/clean-claim statute (Miss. Code Ann. Sec. 83-9-5) governs how fast the PAYER must pay a CLEAN claim once received – 25 days if filed electronically, 35 days if filed on paper, after which benefits are overdue and accrue interest – it does NOT set the provider’s filing deadline. Bottom line: treat commercial timely filing as contract-driven (commonly ~90-180 days) and confirm per payer.

12 months (one calendar year) from the date of service. This is a federal limit under 42 C.F.R. Sec. 424.44 / Section 1842(b)(3) of the Social Security Act and applies in Mississippi exactly as nationwide; Novitas Solutions is the Part A/Part B MAC for Mississippi (Jurisdiction H).

Claims filed after 12 months are denied with no appeal rights, absent a narrow CMS exception (administrative error, retroactive Medicare entitlement, Medicare Secondary Payer recoupment, or a declared disaster). Note Medicare chiropractic is narrow: it covers ONLY manual manipulation of the spine to correct a subluxation (CPT 98940-98942 with the AT modifier for active/corrective treatment); exams, x-rays and therapies furnished by a DC are statutorily excluded.

Generally 12 months (365 days) from the date of service for Mississippi Medicaid fee-for-service claims, per the Division of Medicaid ‘Timely Filing’ policy (Admin. Code Title 23, Part 200) and the Gainwell Paper Claims Billing Manual.

Key Mississippi-specific points: the processing period ends 365 calendar days from the date the original claim is received, and a claim filed within the 365-day window but DENIED can be resubmitted using the transaction control number (TCN) from the original denied claim; for Medicare/Medicaid crossover claims, Medicaid processes the related claim within 180 calendar days after notice of the Medicare disposition; if the provider could not file within 365 days due to the beneficiary’s RETROACTIVE eligibility, the claim must be submitted within 60 days of the retroactive eligibility determination; and a provider may request an Administrative Review within 30 calendar days of a claim denial (with documentation of timely filing or retroactive eligibility).

The Mississippi Medicaid managed-care plans (Magnolia Health, Molina Healthcare of Mississippi, TrueCare/UnitedHealthcare – the MississippiCAN/CHIP coordinated-care organizations) set their own filing limits by contract (commonly 180-365 days; confirm per plan).

State-specific and short: under the Mississippi Workers’ Compensation Medical Fee Schedule (20 Miss. Code R. Part 2, Section II ‘Instructions to Providers’), the medical provider must file the appropriate billing form and documentation within TWENTY (20) days of rendering services on a newly diagnosed work-related injury or illness, and SUBSEQUENT billings must be submitted at least every 30 days (or within 30 days of each treatment/visit, whichever last occurs) with records substantiating medical necessity.

Late billings are subject to a discount of up to 1.5% per month of the untimely-billed amount, and any bill not submitted within 60 days after its due date is subject to an additional one-time 10% discount penalty. Separately, the rules bind the PAYER: a properly submitted bill not fully paid within 30 days of receipt accrues interest at 1.5% per month, and one not paid within 60 days incurs an additional 10% penalty on the unpaid balance.

(Note: the Mississippi Workers’ Compensation Commission’s separate General & Procedural Rules also address medical reporting; e-billing rules are not fully adopted, so confirm submission method with the specific carrier/TPA.) These are high-stakes, regulation-set deadlines – bill promptly.

Mississippi has NO fixed statutory deadline by which a provider must submit auto medical-payments (MedPay) or PIP bills. Mississippi is a TORT (at-fault) state – it is NOT a no-fault/PIP state, and PIP is not mandatory (mandatory coverage is 25/50/25 liability;

MedPay is optional first-party coverage). When a MedPay/auto policy exists, the policy CONTRACT controls bill-submission timeliness, so confirm the submission window with the carrier and bill promptly with an itemized bill and records.

The underlying third-party/liability (bodily-injury) claim – and any provider lien/assignment against a settlement – is governed by Mississippi’s general 3-year personal-injury statute of limitations (Miss. Code Ann. Sec. 15-1-49), measured from the accident date.

Practical sequence: bill the MedPay carrier promptly; once MedPay is exhausted, bill the patient’s health insurance (subject to that payer’s timely-filing window) or pursue the at-fault driver’s liability coverage within the 3-year period.

Confirm any contractual MedPay submission window per policy.