Chiropractic insurance billing in Idaho.

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 Idaho are processed by Noridian Healthcare Solutions (JF) — its Local Coverage Determination and documentation expectations (and its audits of the AT modifier and medical necessity) are the ones your Idaho claims are measured against.

A Idaho chiropractic or multi-specialty practice spends most of its commercial billing day with: Blue Cross of Idaho; Regence BlueShield of Idaho; SelectHealth; PacificSource; Mountain Health CO-OP; Molina Healthcare. Each has its own claim portal, fee schedule, and chiropractic medical-policy quirks.

Chiropractic/PT benefits in Idaho are sometimes delegated to specialty ‘musculoskeletal’ network managers, which changes WHERE claims, prior auths, and credentialing go. The dominant delegated manager is American Specialty Health (ASH;

ASHLink). In Idaho, ASH administers chiropractic/acupuncture benefits for Aetna (Aetna states its Idaho individual Medicare Advantage chiropractic/acupuncture supplemental program is fully delegated to ASH for in- and out-of-network admin and claims) and for Cigna (ASH is delegated for network management, credentialing, utilization management, medical-necessity review, and claims processing) – for those members, providers must contract with ASH and submit claims/auths through ASHLink, not the carrier.

By contrast, the two largest Idaho-domiciled commercial payers, Blue Cross of Idaho and Regence BlueShield of Idaho, generally manage chiropractic IN-HOUSE under their own medical/reimbursement policies (Blue Cross of Idaho PAP/MAP 218 Chiropractic Services;

Regence Physical Medicine program and chiropractic/osteopathic reimbursement policy) rather than delegating to ASH. PacificSource (active in southern/southwest Idaho, including Medicaid and Medicare lines) administers chiropractic/physical-medicine benefits itself with its own visit thresholds and prior-auth rules.

Optum/UHC’s musculoskeletal/physical-health management may apply to UnitedHealthcare lines. ALWAYS confirm on each patient’s card/plan whether chiropractic is ‘carved out’ to ASH (or another vendor) before billing – this is the single most common Idaho chiropractic routing error.

As of 2025-2026; verify per plan.

Idaho has NO state-mandated stand-alone chiropractic benefit, so chiropractic coverage, visit caps, and rules are entirely plan/contract-specific – read each member’s plan. Key things that trip up Idaho chiropractic billing:

• Active-treatment vs. maintenance and the AT modifier. Blue Cross of Idaho (and Medicare via Noridian, and most plans) only pay manual spinal manipulation (CPT 98940/98941/98942) for active/corrective treatment of a documented subluxation; the AT modifier must be present (Blue Cross of Idaho requires AT in the primary modifier position or it denies the line as maintenance). Maintenance/wellness care is non-covered.
• Medicare scope is narrow: only 98940-98942 spinal manipulation is covered; exams, x-rays, therapies, and extraspinal manipulation (98943) by a DC are statutorily non-covered, so collect ABNs and bill GA/GY appropriately.
• Visit caps & re-eval/treatment-plan rules: most plans impose annual visit limits and require a documented treatment plan with measurable goals and periodic re-evaluation to support medical necessity; care beyond benchmark visit counts may need prior auth or additional clinical documentation (e.g., PacificSource exempts an initial block of visits before PA is required, then requires PA beyond the threshold).
• Delegated carve-outs (ASH for Aetna/Cigna members): ASH applies its own clinical guidelines, visit allotments, and authorization workflow, and claims go through ASHLink – billing the carrier directly for an ASH-managed member causes denials.
• Therapy/PT services billed by chiropractors (97xxx) often follow separate medical-necessity, modifier (e.g., 59/X-modifiers, GP), and prior-auth rules than the manipulation codes. Verify benefits, accumulated visits, and PA requirements before each course of care. As of 2025-2026; confirm per payer.

Largely contract/payer-set; there is no single Idaho statute that fixes a commercial INITIAL-claim filing deadline. The common window for Idaho commercial/private payers is generally 90 to 180 days from the date of service (some plans allow up to 12 months) – confirm the exact deadline in each payer contract/provider manual, as it controls.

Idaho context: under the state prompt-pay law (Idaho Code 41-5602), the fastest payment timelines apply when the provider submits a clean claim within 30 days (electronic) or 45 days (paper) of service, and the insurer must then pay or deny within 30 days (electronic) or 45 days (paper) of receipt; ‘clean claim’ is defined by the provider-insurer contract.

As of 2025-2026; confirm per payer.

12 months (one calendar year) from the date of service. This is the federal Medicare initial-claim filing limit (Social Security Act 1842(b)(3)(B); 42 CFR 424.44), and it applies uniformly in Idaho (Noridian is the Part A/B MAC for Idaho).

Claims received after 12 months are denied. As of 2025-2026.

12 months (365 days) from the date of service. Per the Idaho Department of Health and Welfare / Idaho Medicaid: ‘All claims must be submitted to Idaho Medicaid within twelve months (365 days) from the date of service.’ Exception: Medicare crossover claims must be submitted within six

• months of the date of the Medicare payment/EOB. Managed-care/dental/behavioral-health plan deadlines may differ – confirm with the specific plan. As of 2025-2026.

120 days from the date of service. Per Idaho Industrial Commission rule IDAPA 17.01.01.803.06, failure to submit a compliant bill to the payor within one hundred twenty (120) days of the date of service makes the provider ineligible to use the Commission’s medical-fee dispute-resolution procedures.

Note: these time periods do not begin to run before the Notice of Injury/Claim for Benefits has been filed. As of 2025-2026; confirm per payor.

No fixed statutory bill-SUBMISSION deadline. Idaho is a traditional fault (tort) state and does NOT mandate no-fault/PIP; first-party auto medical coverage is MedPay, which is optional and contract-governed. There is no Idaho statute setting a hard ‘days-to-submit’ window for auto medical bills, so the practical norm is the timeline in the auto policy’s MedPay provision (submit promptly / provide notice as soon as practicable) – confirm per policy. Related statute: Idaho Code 41-2514 bars an insurer from limiting MedPay recovery to only costs incurred within three

• years of the injury (a benefit-period floor, not a filing deadline). Bodily-injury liability claims against an at-fault driver are governed by Idaho’s general personal-injury statute of limitations (2 years), which is a lawsuit deadline, not a billing deadline. As of 2025-2026.