Chiropractic Billing Services

Chiropractic billing services from Medical Billing Services Group (MBSG) cover the full revenue cycle for chiropractic practices — from Medicare’s strict subluxation coverage rules through commercial payer policies, documentation standards, and denial recovery. Chiropractic has some of the narrowest coverage rules in Medicare; we make sure every claim reflects the actual coverage category of the visit.

Chiropractic claims denied as maintenance? Get a Free Billing Audit — we will review your AT modifier usage, subluxation documentation, and denial patterns and show you exactly where revenue is leaking.

Practice/setting fit

Our chiropractic billing services fit solo chiropractic practices, multi-doctor chiropractic clinics, and integrated practices with chiropractic departments. Chiropractic billing is unlike any other specialty because Medicare covers exactly one thing: manual manipulation of the spine to correct a subluxation. Everything else a chiropractor furnishes — examinations, x-rays, physiotherapy modalities, maintenance adjustments — falls outside Medicare coverage, and the claim must distinguish active corrective treatment from maintenance care on every visit. Practices that cannot make that distinction cleanly see their claims denied in bulk.

We manage the full revenue cycle for these settings: benefits verification with attention to chiropractic coverage limits, coding that reflects the coverage category of each visit, daily claim submission with correct modifiers, payment posting with contractual adjustments, and denial follow-up that goes back to the treatment note. Our coding team checks chiropractic claims against Medicare’s coverage rules before submission, and our broader specialty billing programs cover your other service lines.

Documentation and coding risks

Chiropractic’s biggest billing risk is the active-versus-maintenance boundary. Medicare pays for active/corrective treatment of subluxation and excludes maintenance therapy — defined as treatment that seeks to prevent disease, promote health, or maintain or prevent deterioration of a chronic condition when no further clinical improvement is expected. The AT modifier is how the claim declares which category the visit falls in, and getting it wrong in either direction costs money.

The AT modifier declares active treatment — and only active treatment

For Medicare purposes, the AT modifier is appended to the chiropractic manipulation codes (98940 for one to two spinal regions, 98941 for three to four regions, 98942 for five regions) only when the manipulation is active or corrective treatment of an acute or chronic subluxation. Claims for active/corrective therapy submitted without the AT modifier are treated as maintenance therapy and denied. Conversely, the AT modifier must never be appended when maintenance therapy was furnished — using it to obtain payment for maintenance care is a compliance risk. The modifier attests to the nature of the visit; the treatment note must support the attestation.

Payer/program: Medicare (CMS) · Jurisdiction: United States (federal) · Source: “Medicare Benefit Policy Manual, Publication 100-02, Chapter 15, Section 30.5 (Chiropractic Services); CMS Chiropractic Services manual guidance on the AT modifier” · Last reviewed: 2026-10-08

Subluxation must be specified — “pain” alone is not enough

Medicare requires the precise level of the subluxation to be specified to support the claim, and the manipulative services must have a direct therapeutic relationship to the patient’s condition with a reasonable expectation of recovery or improvement of function. A bare diagnosis of pain, without the documented subluxation it relates to, does not support medical necessity. The initial treatment date (or date of exacerbation) belongs in Item 14 of the CMS-1500 form, and when an x-ray documents the subluxation, its date belongs in Item 19. Missing or vague subluxation documentation is one of the most common reasons chiropractic claims fail medical review.

Most of what a chiropractor does is non-covered by Medicare

Examinations, x-rays and other diagnostic services, and physiotherapy modalities ordered or furnished by a chiropractor are not covered by Medicare — even when they are reasonable and appropriate care. (An x-ray taken to document the subluxation may support the record, but there is no separate Medicare payment for it.) Because these are statutorily non-covered rather than denied for medical necessity, no advance beneficiary notice is strictly required — though many practices use voluntary notices as a courtesy. For services denied as not reasonable and necessary where an ABN was signed, the GA modifier applies; without a signed ABN, the GZ modifier reports the service with no patient liability. We set up these workflows so non-covered services are identified before the claim, not after the denial.

Payer and authorization checks

Commercial payer policies for chiropractic vary far more than Medicare’s. Visit limits, medical-necessity review triggers, covered-modality lists, and documentation requirements differ by plan, and some payers apply their own maintenance-care definitions. We verify benefits and authorization requirements before the episode of care where the payer requires it, confirm which services each plan covers when furnished by a chiropractor, and track visit counts against plan limits. Our eligibility and prior authorization team handles this payer-by-payer work so your front desk does not have to memorize dozens of policies.

Workflow and reporting

Chiropractic practices need reporting that tracks the coverage categories. We provide visit-level reporting (active versus maintenance visit mix, AT modifier usage, regions treated per code), denial reporting by cause (maintenance denials, subluxation documentation, non-covered services, plan-limit exhaustions), and payer-level payment tracking. Reports arrive on a set schedule with every metric defined, so your practice can see whether denial rates are actually improving. Payment posting includes contractual adjustments per payer fee schedule, and denial management follows a documented path from correction to appeal.

Onboarding and pricing factors

Onboarding a chiropractic practice starts with a review of your current AT modifier usage, subluxation documentation, and visit notes against Medicare’s coverage rules — the boundary where most chiropractic revenue leaks. We then map your visit types to the correct codes and modifiers, confirm we can work inside your existing EHR and practice-management systems with compatibility confirmed during onboarding, and set up daily claim submission. We do not publish flat rates: pricing is quoted and scoped in your written proposal after we review your visit volume, payer mix, and systems. Data is handled under our HIPAA safeguards and business associate agreement. No client outcomes are cited until verified and permissioned.

FAQs and dated sources

What does Medicare actually cover for chiropractic care?
Medicare coverage of chiropractic services is limited to manual manipulation of the spine to correct a subluxation — reported with 98940, 98941, or 98942 depending on the number of spinal regions treated. Examinations, x-rays, modalities, and maintenance therapy are not covered. Source: Medicare Benefit Policy Manual, Pub. 100-02, Chapter 15, §30.5 — last reviewed 2026-10-08.

When should the AT modifier be used?
The AT modifier is appended to 98940–98942 only when the manipulation is active or corrective treatment for an acute or chronic subluxation. It must not be used for maintenance therapy; claims without it are processed as maintenance and denied. The treatment note must support whichever category the modifier declares.

What is the difference between active treatment and maintenance therapy?
Active treatment seeks to correct the subluxation with a reasonable expectation of recovery or improved function. Maintenance therapy — care that seeks to prevent disease, promote health, or maintain against deterioration of a chronic condition when no further improvement is expected — is excluded from Medicare coverage. The distinction is clinical and must be documented visit by visit.

Why were our claims denied even though we used the AT modifier?
The AT modifier attests to active treatment but does not establish medical necessity by itself. If the record lacks the specified subluxation level, the treatment-to-condition relationship, or evidence of expected improvement, the contractor can still deny on medical review. We check the documentation behind the modifier before submission.

Do we need an ABN for non-covered chiropractic services?
For statutorily non-covered services (exams, x-rays, modalities furnished by a chiropractor), Medicare does not require an ABN, though voluntary notices are common. For services that may be denied as not reasonable and necessary, a signed ABN with the GA modifier protects patient liability; without a signed ABN, the GZ modifier applies. We build the right notice workflow for each service type.

Does Medicare cover extremity adjustments (98943)?
No. Medicare does not cover extraspinal manipulation regardless of documentation, so the AT modifier rules do not apply to 98943 for Medicare purposes. Commercial payer coverage of extraspinal manipulation varies by plan.

General educational information, not legal advice or a guarantee of reimbursement. Requirements vary by payer, plan, setting and date of service.

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Medical Billing Services Group — Medical Billing & Revenue Cycle Management. Remote, serving all 50 US states. Call +1 (307) 396-4107 or email contact@medicalbillingservicesgroup.com — or contact our team to start with a Free Billing Audit.