Chiropractic insurance billing in South Dakota.

Original Medicare Part B covers medically necessary manual spinal manipulation to correct a subluxation (CPT 98940 to 98942). Use the AT modifier for active or corrective treatment; the modifier alone does not establish medical necessity.

For a usually covered service expected to be denied in a particular case, such as spinal manipulation that has become maintenance care, a valid ABN is required before treatment to transfer potential financial liability to the patient. Exams, X-rays and therapies performed by a chiropractor are statutorily excluded from this benefit; an ABN for those services is voluntary. Medicare Advantage uses separate plan coverage and notice procedures, not the Original Medicare ABN. See CMS guidance on advance notices and our chiropractic Medicare billing guide.

Original Medicare Part B claims in South Dakota are processed by Noridian Healthcare Solutions (JF). Check its applicable Local Coverage Determination and documentation requirements for the date of service.

Carriers listed for South Dakota include Wellmark Blue Cross Blue Shield of South Dakota; Sanford Health Plan; Avera Health Plans; UnitedHealthcare; Aetna; Medica. Check the member’s product, network, claim destination and applicable chiropractic policy.

South Dakota is a comparatively LOW-delegation chiropractic market: the dominant commercial payers are locally owned, integrated-health-system plans that manage chiropractic/physical-medicine benefits largely IN-HOUSE rather than carving them out to a national specialty-network manager.

• Wellmark Blue Cross Blue Shield of South Dakota — the largest commercial carrier in the state — directs medical authorization requests through its Medical Authorization Table, which identifies the required process and submission tool. Electronic claims go through Availity; Availity is not the medical-authorization tool. Credentialing uses Wellmark E-credentialing Central.
• Avera Health Plans (which owns DAKOTACARE) and
• Sanford Health Plan — the two large provider-sponsored plans — likewise manage chiropractic within their own plan rules, preauthorization lists, and visit limits (Sanford plan documents show a combined physical/occupational/speech/chiropractic therapy visit allowance; verify the specific Summary of Benefits).
• Medica (a significant South Dakota commercial and Medicare/Medicaid-adjacent payer) administers chiropractic under its own South Dakota provider requirements.
• UnitedHealthcare members in South Dakota follow UHC’s national pattern: chiropractic/outpatient-therapy authorization and Medicare Advantage prior authorization are managed through Optum / Optum Physical Health (entered via the UnitedHealthcare Provider Portal, adjudicated in Optum systems). For dates of service from October 1, 2026, UHC removes prior authorization for spinal CMT 98940-98942 on its Medicare Advantage code list, subject to plan-specific exceptions. The separate D-SNP list does not include these CMT removals; other products and therapy codes have separate requirements.
• American Specialty Health (ASH) operates nationally for several carriers (Cigna and certain Aetna/Anthem/Health Net product lines), so an out-of-state-administered or national-employer plan presenting in South Dakota may still route chiropractic to ASH (ashlink.com) even though the home-state plans do not. BOTTOM LINE: always verify on the member’s ID card/portal whether chiropractic is handled by the health plan directly (typical for Wellmark, Avera/DAKOTACARE, Sanford, Medica) or carved out to Optum (UHC) or ASH (some national plans), because that determines where credentialing, prior auth/treatment-plan submission, and claims go; misrouting is a leading denial cause. Workers’-comp chiropractic in South Dakota goes through the WC payer under the state fee schedule; auto/PIP/Med-Pay through the member’s auto carrier.

What actually trips up chiropractic billing in South Dakota:

• South Dakota does NOT have a stand-alone mandated chiropractic BENEFIT, but it has a chiropractic NON-DISCRIMINATION / freedom-of-practitioner statute — SDCL 58-17-54 (‘Reimbursement provisions applicable to all healing arts licensees’) provides that a health insurance policy may not deny reimbursement for services legally performed by a person licensed in South Dakota for, among others, CHIROPRACTIC (alongside medicine, osteopathy, podiatry, optometry, dentistry, psychology, and CRNA anesthesia) when the policy covers that service — i.e., if the service is covered, it can’t be denied solely because a licensed chiropractor performed it. A companion, SDCL 58-17-54.1, addresses COPAYMENT/COINSURANCE amounts for chiropractic, physical therapy, or occupational therapy services (a cost-sharing parity lever). These are anti-discrimination/parity provisions, not a requirement that every plan cover chiropractic — verify whether the specific plan covers it and at what visit limit.
• Carve-out routing is a leading denial cause: Wellmark/Avera/Sanford/Medica run chiropractic in-house (Wellmark directs authorizations through its Medical Authorization Table and electronic claims through Availity), while UnitedHealthcare routes through Optum via the UHC portal and some national Cigna/Aetna/Anthem plans route to ASH (ashlink.com) — sending the auth or claim to the wrong entity gets it bounced; confirm the delegated entity on the member’s card before submitting.
• Visit caps / treatment-plan & medical-necessity rules — expect annual visit limits and treatment-plan/re-evaluation requirements with a clear shift from active/corrective to ‘maintenance’ care (maintenance is typically non-covered); plan caps vary, so check the specific Summary of Benefits (Sanford documents show a combined therapy visit allowance; use Wellmark’s Medical Authorization Table for the service-specific request process).
• Modifier/coding quirks — on Medicare/MA spinal manipulation (98940-98942) the AT modifier is required for active/corrective care, with correct GA/GY/GZ usage; for plans that cover chiropractor-billed E/M, modifier -25 identifies a significant, separately identifiable E/M billed with a manipulation. Original Medicare covers only spinal manipulation, not the DC’s exams, x-rays, or therapies.
• SOUTH DAKOTA MEDICAID chiropractic is tightly limited (South Dakota Medicaid Billing and Policy Manual — Chiropractic Services, updated Jan. 2024): coverage includes spinal MANUAL MANIPULATIONS to correct a subluxation, qualifying E/M visits, and specified spinal x-rays; the cap is a MAXIMUM OF 30 manual manipulations of the spine per PLAN YEAR (July 1-June 30) across any combination of CPT 98940/98941/98942 — this cap CANNOT be exceeded for recipients age 21+ (under 21 it may be exceeded with prior authorization via EPSDT). The PRIMARY diagnosis MUST be the level of subluxation (an x-ray is NOT required to demonstrate subluxation; physical exam suffices), and symptoms may be listed only as secondary; claims with disallowed primary/secondary ICD-10 codes deny. Chiropractic MAINTENANCE therapy is non-covered, and South Dakota Medicaid does NOT cover acupuncture, any joint manipulation outside the spine (extraspinal), electrical stimulation, ultrasound, custom orthotics from the DC’s office, or vitamins/supplements/counseling — a critical difference from many commercial plans. E/M is reimbursable only if it is the provider’s customary practice to charge all patients, is distinctly different from a same-day manipulation (modifier -25), and generally only ONE E/M per 12 months unless a separate/distinct injury is documented; spinal x-rays are limited to 2 units per spinal region (cervical/thoracic/lumbar) per plan year; bill on CMS-1500/837P within the 6-month window. NOTE: unlike North Dakota and some states, South Dakota Medicaid does NOT impose an AT-modifier requirement on CMT in its chiropractic manual — follow the manual’s subluxation-primary-dx rule instead.
• WORKERS’ COMP chiropractic is paid under the state WC medical fee schedule (ARSD ch. 47:03:05) and is subject to the 30-day employer pay/deny rule (SDCL 62-4-1.1) — not the commercial rules; bill CMS-1500 with records. Not legal advice — verify benefits and current rules per payer.

Largely CONTRACT/PAYER-SET, not fixed by a single South Dakota statute — the initial-claim filing window is whatever the participating-provider agreement or the payer’s provider manual specifies. In practice South Dakota commercial/private payers commonly use a 90-180 day window from the date of service (some plans allow up to 12 months); always confirm the exact number in your contract or the payer’s provider manual, since the dominant South Dakota carriers are locally owned health-system plans (Wellmark Blue Cross Blue Shield of South Dakota, Avera Health Plans/DAKOTACARE, Sanford Health Plan) plus Medica and UnitedHealthcare, each with its own deadline.

South Dakota does NOT set a minimum provider-submission floor, but its insurance code regulates how fast the PLAN must act: under the prompt-pay / clean-claim provisions of SDCL ch. 58-12 (58-12-19 defines a ‘clean claim’; 58-12-20/58-12-21 set the processing standards), an insurer must pay, deny or settle a payable clean claim within 30 days if received electronically or 45 days if received otherwise — that is the insurer’s PAYMENT clock, not the provider’s SUBMISSION deadline, which remains contractual.

Separately, SDCL 58-33-67 (unfair claim settlement practices) requires insurers to acknowledge and act reasonably promptly on claim communications. As of 2025-2026; verify the exact window per payer and contract, and use the clean-claim scope and processing periods in SDCL ch. 58-12.

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 (Medicare Claims Processing Manual, Ch. 1), not by South Dakota.

Medicare Advantage plans set their own deadlines (often similar, up to ~12 months) — confirm per plan. Note for chiropractic: Original Medicare covers ONLY manual spinal manipulation to correct a documented subluxation (CPT 98940-98942) with the AT modifier on active/corrective-care claims; the chiropractor’s exams, x-rays, extraspinal manipulation (98943), and therapy modalities are NOT covered.

UHC’s Medicare Advantage code list removes prior authorization for spinal CMT 98940-98942 effective October 1, 2026, subject to plan-specific exceptions. The separate D-SNP list does not include these CMT removals; other product and therapy-code requirements remain separate.

Supplemental routine-chiropractic benefits on Medicare Advantage plans are separate from Original Medicare’s benefit.

South Dakota Medicaid: South Dakota Medicaid must RECEIVE a provider’s completed claim form within 6 MONTHS following the MONTH the service was provided, per ARSD 67:16:35:04 and the South Dakota Medicaid Billing and Policy Manual (General Claim Guidance).

The manual publishes a ‘Last Month to Submit’ table: e.g., a January date of service must be received by the last day of July; a December DOS by the last day of June. This time limit may be WAIVED or EXTENDED only when one of these applies:

(a) the claim is an adjustment or void of a previously paid claim received within 3 months after the previously paid claim; (b) the claim is received within 6 months after a retroactive INITIAL eligibility determination made as the result of an appeal;

(c) the claim is received within 3 months after a previously DENIED claim; (d) the claim is submitted with the primary insurer’s EOB within 6 months after the provider receives payment from (or a denial notice from) Medicare or private health insurance; or (e) to correct an error made by South Dakota Medicaid.

For MEDICARE CROSSOVERS that do not auto-cross, providers should submit the crossover claim only after 30 days have passed from the date of the Explanation of Medicare Benefits (EOMB) and the claim is not yet shown on the South Dakota Medicaid remittance advice as paid, pended, or denied, with the EOMB attached.

South Dakota Medicaid is generally the payer of last resort, so third-party (TPL) sources must be pursued first and the third-party EOB attached. The submission date is the date the claim is received by South Dakota Medicaid. NOTE:

South Dakota Medicaid is largely fee-for-service / PCCM (no statewide commercial MCO carve-out as of 2025-2026); confirm the current manual before relying on these.

South Dakota Workers’ Compensation has NO fixed statutory number-of-days deadline requiring a medical provider to SUBMIT a bill to the employer/insurer. The state regulates the PAYER side and the CLAIMANT side instead:

• Employer/insurer PAYMENT clock — under SDCL 62-4-1.1, within THIRTY (30) DAYS after receiving a ‘properly submitted’ medical bill the employer must pay the undisputed portion, deny all or part (e.g., injury not compensable, or charge excessive / not medically necessary), or request additional information; a ‘properly submitted medical bill’ is defined in ARSD 47:03:09:01 (billed per CMS/NCPDP/ADA coding standards and accompanied by sufficient records to judge reasonableness and necessity). An employer that fails to comply with 62-4-1.1 without good cause is subject to a $500 administrative fine per act of noncompliance payable to the Department of Labor and Regulation.
• CLAIMANT statute of limitations — the injured worker’s right to compensation is barred unless a written petition for hearing is filed within TWO YEARS after the insurer/self-insurer notifies the claimant and the Department, in writing, that it intends to deny coverage in whole or in part (SDCL 62-7-35); where benefits have been paid, a claim for ADDITIONAL compensation is barred unless filed within THREE YEARS from the date of the last payment of benefits (SDCL 62-7-35.1). Bill on the CMS-1500 (UB-04 for facilities); South Dakota has NOT adopted an e-billing mandate, so confirm electronic submission with the payer. Reimbursement is capped by the state WC medical fee schedule (ARSD ch. 47:03:05, an RVP / Relative Values for Physicians-based schedule; unlisted/RNE/By-Report items reimburse at 80% of the provider’s charge). PRACTICAL NORM: because the 30-day pay/deny clock and the $500 penalty run from a ‘properly submitted’ bill, submit complete CMS-1500 bills with records promptly and on a rolling basis. Confirm the current rule and fee schedule before relying on these.

South Dakota is an AT-FAULT (tort) state — it is NOT a no-fault state and has NO mandatory PIP. There is NO fixed statutory number-of-days deadline requiring a provider to SUBMIT medical bills to an auto carrier. First-party medical coverage is OPTIONAL Medical Payments (Med-Pay) and/or optional PIP a driver may buy; any bill-submission timeframe is set by the individual auto policy (commonly a 1-, 2-, or 3-year window), not by statute — submit promptly per the policy’s notice/proof-of-loss terms.

SDCL 58-12-21 expressly excludes auto medical-payment coverage from the health clean-claim clock. Auto claim handling remains subject to SDCL 58-33-67, including acknowledgment and action on claim communications within 30 days and reasonable investigation.

The underlying third-party liability (bodily-injury) claim is governed by South Dakota’s 3-year personal-injury statute of limitations (SDCL 15-2-14(3)); on a liability/lien basis, bills are typically presented at settlement. South Dakota’s minimum auto liability is 25/50/25 with 25/50 uninsured-motorist coverage.

Confirm each Med-Pay/PIP policy’s notice and submission terms.