Medicare Thinks 79.5% of Chiropractic Claims Are Wrong. Here's What That Means for Your Practice

A Medicare audit contractor just told the chiropractic profession that roughly four out of every five claims it submits are wrong. According to Strategic Chiropractic, Palmetto GBA's latest audit investigation revealed that 79.5% of chiropractic claims were submitted incorrectly and therefore did not merit payment. That figure should get the attention of every practice owner billing Medicare, regardless of how long they have been doing it.

• What Did the Audit Actually Find?
• What Is the AT Modifier Problem and Why Does It Keep Coming Up?
• How Exposed Is a Typical Chiropractic Practice?
• Why This Matters for Chiropractors

What Did the Audit Actually Find?

Palmetto GBA is a Medicare Administrative Contractor responsible for processing and auditing claims in a large portion of the country. According to Strategic Chiropractic, the investigation focused on whether chiropractic treatment plans met Medicare's definition of medical necessity and whether that necessity was adequately documented in visit records.

The 79.5% error rate does not mean that 79.5% of patients did not benefit from care. It means that in nearly eight out of ten reviewed cases, the documentation submitted with the claim failed to satisfy Medicare's requirements. Medicare does not pay for maintenance care. It pays for care that is actively correcting a condition or preventing it from getting significantly worse. The burden is on the provider to prove that distinction, visit by visit, in writing.

This is not a new standard. What is new is the scale at which auditors are finding providers falling short of it. The implications for practices carrying a Medicare patient base are significant, particularly if a post-payment audit triggers a repayment demand going back multiple years.

What Is the AT Modifier Problem and Why Does It Keep Coming Up?

Medicare requires chiropractors to append the AT modifier to spinal manipulation procedure codes when billing for active treatment as opposed to maintenance care. The AT modifier is the signal to Medicare that the service being billed qualifies for reimbursement. The problem, according to Strategic Chiropractic, is that many practices apply the AT modifier correctly at the billing level but fail to support it in the clinical documentation.

Medicare wants to see, in each visit note, that the patient's condition at that specific visit warranted skilled care. Vague or templated notes that do not reflect the patient's current status, objective findings, or response to treatment are the most common reason claims are denied or flagged for repayment. A note that reads the same on visit three as it does on visit thirty-three is a liability.

For practices using electronic health record templates or carrying over prior note language, this is a documentation habit worth reviewing immediately. The audit record does not care how much time you spent with the patient. It evaluates what you wrote down.

Related reading: Medicare Chiropractic Billing and the AT Modifier covers the compliance mechanics in more detail.

How Exposed Is a Typical Chiropractic Practice?

The short answer is: more exposed than most owners realize. Medicare audits are not random in the way that word implies. Audit contractors use data analysis to identify billing patterns that deviate from peers. A practice that consistently bills at higher visit frequency, applies the AT modifier at a rate above regional norms, or shows low variability in treatment codes is more likely to land on a target list.

A post-payment audit can reach back two years under standard recoupment rules, and further under certain circumstances. If an audit reviews 30 claims and finds a 79% error rate, the contractor can extrapolate that rate across your entire billing history and demand repayment accordingly. That is how a documentation problem on individual visits becomes a six-figure financial event.

According to American Chiropractic Association 2025, the profession continues to evolve in how care is delivered and how practices are structured. That evolution needs to include billing and documentation discipline, not just clinical scope. Practices that have grown their Medicare volume without updating documentation protocols are carrying risk that is not visible until an audit notice arrives.

Chiropractors who want to check their own exposure should start by pulling a sample of their own AT modifier claims and evaluating whether the visit notes, taken alone, would persuade a Medicare reviewer that active treatment was warranted on that date. If the answer is uncertain, that is the answer.

Why This Matters for Chiropractors

An 80% error rate on Medicare claims is not a billing technicality. It is a signal that the gap between how chiropractic care is delivered and how it is documented for federal payers is wide enough to create serious financial risk for practices across the country. The audit data gives Medicare contractors justification to target chiropractic billing more aggressively, which means practices that have not been audited yet should not take that as a sign of approval.

The practices most at risk right now are those billing Medicare regularly, using visit note templates without visit-specific objective findings, and applying the AT modifier as a routine billing step rather than a clinical determination backed by documentation. A documentation audit with a billing consultant or compliance attorney, done proactively, costs far less than a post-payment repayment demand.

Treat your visit notes the way you treat your adjustments: specific, current, and justified by what you are actually seeing in the patient that day.