Guides
Medicare Chiropractic Billing Rules Most Providers Get Wrong
Medicare chiropractic billing rules trip up practices that treat federal coverage like a commercial plan. Here is what Part B actually pays for.
What to take away
- Medicare Part B pays only for manual manipulation of the spine to correct a subluxation, reported with CPT 98940, 98941 or 98942.
- Maintenance therapy is excluded by statute. The rule is federal and does not bend to state scope of practice.
- The ABN is voluntary in most cases, but a signed one is the only path to billing the patient when Medicare would deny.
- Documentation must support the medical necessity of the treatment, not just the adjustment delivered.
- Skipping the rules produces demand letters, extrapolated overpayment demands and possible revocation, not a warning.
Who has jurisdiction over a Medicare chiropractic claim
Medicare is a federal payer. State boards license you and set scope of practice. They do not decide what Medicare covers. A chiropractor can be fully licensed in Texas or Ohio and still have every maintenance claim denied.
Medicare Administrative Contractors process the claims. Each MAC publishes its own local coverage determination for chiropractic services, and those determinations vary in how they describe documentation and re-examination. Check the MAC for your jurisdiction before you assume a national rule applies.
The coding set is narrow. Only three CPT codes exist for chiropractic manipulation, and they are defined by the number of spinal regions treated. A treatment plan built on other codes will not survive review. The CPT code system is the starting point for understanding why the set is so small.
What triggers Medicare coverage and what does not
Coverage turns on two things: an active subluxation and a treatment goal of correction or improvement.
| Element | Covered | Not covered |
|---|---|---|
| Subluxation documented | Yes | No |
| Goal is correction or improvement | Yes | No |
| Goal is symptom maintenance | No | Yes |
| Patient stable, no expected change | No | Yes |
Maintenance therapy is the exclusion most practices misread. Once the patient's condition is stable and further treatment aims only to preserve that state, Medicare does not pay. That is a statutory exclusion, not a MAC preference.
Medicare chiropractic documentation requirements
The record has to show the subluxation, the method of detection, and the clinical reason the adjustment is expected to help. A note that says "patient feels better, adjusted as usual" supports nothing.
- Record the history and the presenting complaint for the visit.
- Document the examination findings that establish the subluxation.
- State the treatment goal in terms of correction or improvement.
- Note the response to prior treatment and any change in the plan.
- Sign and date the entry on the day of service.
- Subluxation identified by named method
- Goal stated as correction or improvement
- Response to previous visit recorded
- Date and signature present
An auditor reading a thin note has one question: what made this visit necessary today? If the note cannot answer it, the claim is exposed. A quality assurance checklist helps practices catch those gaps before a contractor does.
How the ABN changes who pays
The Advance Beneficiary Notice of Noncoverage is how a practice transfers financial responsibility to the patient when Medicare is expected to deny. Without a signed ABN, the practice generally cannot bill the patient for the denied service.
An ABN signed before the service is the difference between a collectible account and a write-off. Signed after the fact, it is worth nothing.
The form must name the service, the reason Medicare may not pay, and the estimated cost. The patient chooses whether to receive the service and whether to be billed. Keep the signed copy in the record.
What happens if you skip the rules
A single audit can produce a demand for every similar claim in the sample, and contractors may extrapolate that sample across the whole period reviewed. That is how a handful of undocumented maintenance visits becomes a five figure repayment demand.
Repeat findings carry more than money. Contractors can suspend payments while reviewing, place a practice on prepayment review, and refer egregious cases for revocation of Medicare enrollment. A practice that loses enrollment cannot bill Medicare at all.
Denials are recoverable, but the clock matters. The CMS transmittals set out the appeal levels and deadlines, and a redetermination filed late is simply lost revenue. The claim denial appeal steps walk through what a reconsideration request needs to include.
Where practices usually go wrong
Three failures repeat. The first is treating Medicare like a commercial payer and assuming a signed plan of care settles the question. The second is continuing care past the point of expected improvement without converting to a maintenance arrangement and an ABN. The third is documentation written for the patient rather than for a reviewer.
Payment rates come from the Medicare Physician Fee Schedule, which changes annually. Practices that build fee expectations on last year's numbers misjudge what a denied claim is actually worth. The fee schedule lookup is the authoritative source for those rates.
Example
A practice treats a patient twice weekly for eleven weeks. The notes after week six read "stable, continues to report relief, adjusted." Medicare pays the early visits and denies the later ones. The contractor samples ten similar files and demands repayment on all of them, plus interest. Nothing in the clinical care was wrong. The documentation stopped showing a reason to expect improvement, and that is what the demand letter says.
Common questions
Does Medicare cover maintenance adjustments? No. Maintenance therapy is excluded by statute, regardless of how the patient feels or what the state license permits.
Is an ABN always required? No. It is required when the practice believes Medicare will deny and intends to bill the patient. Without one, that bill is usually uncollectible.
Can a chiropractor opt out of Medicare? Yes, but opting out has conditions and affects all Medicare beneficiaries. Practices should review the insurance costs and coverage implications before deciding.
Do all MACs apply the same documentation standard? No. Each contractor publishes its own coverage determination, so the documentation emphasis can differ by jurisdiction.
