Chiropractic Medical Billing Services | CMT Codes & AT Modifier RCM

We handle chiropractic billing end to end, with special attention to the coverage rules that trip up most offices. Medicare covers chiropractic manipulation only for active treatment with the AT modifier and documented medical necessity — exactly where chiropractic-trained coders protect revenue.

Chiropractic billing we handle

CMT codes — spinal manipulation 98940–98942 by regions treated.
AT modifier — active treatment applied correctly to support coverage.
Active vs maintenance — documented so medically necessary care is paid and maintenance is handled properly.
Medicare compliance — coverage rules and documentation requirements met.
Therapy & exam codes — associated services coded with correct modifiers.
X-ray — imaging with correct component billing where performed.

The AT modifier rule. Medicare pays chiropractic manipulation only when it's active treatment (AT modifier) with documented medical necessity — maintenance care is not covered. Missing or misusing the AT modifier is the top cause of chiropractic denials, and exactly what we get right.

Why chiropractic practices lose revenue

The usual losses: missing or incorrect AT modifier, maintenance care billed as active treatment, insufficient medical-necessity documentation, and associated therapy codes billed without correct modifiers. Chiropractic-trained coders apply the rules correctly.

What you get with PRMS

AT-modifier accuracy

Active-treatment coding that meets Medicare and payer coverage rules.

Medical-necessity support

Documentation reviewed so covered care is paid and maintenance is handled right.

Full capture

CMT, therapy, exams, and X-ray all billed correctly.

Chiropractic billing FAQs

Why is chiropractic billing so denial-prone?

Medicare and many payers cover chiropractic manipulation only as active treatment with the AT modifier and documented medical necessity. Maintenance care is not covered, so modifier and documentation errors cause frequent denials.

What is the AT modifier?

The AT (Active Treatment) modifier tells the payer the chiropractic manipulation is active, medically necessary care rather than maintenance. It is required for coverage of CMT codes and must match the documentation.

Do you handle the active-vs-maintenance distinction?

Yes. We ensure active treatment is coded and documented for coverage, and maintenance care is handled correctly so the office stays compliant and paid.

How soon will results show?

Most chiropractic offices see fewer AT-modifier denials and cleaner claims within the first one to two billing cycles.

Related services & specialties

Explore our full billing, coding & denial management services and provider credentialing, or see other specialties including physical therapy and more.