Billing and Coding: Chiropractic Services

Covers Medicare billing/coding for chiropractic manipulation (CPT 98940, 98941, 98942) and excludes non‑covered services (which must be billed with appropriate denial/waiver modifiers rather than as covered). Key requirements: claims must document initial treatment or date of exacerbation, precise spinal level of subluxation (with ICD‑10‑CM codes and X‑ray date if used), classify treatment as acute, chronic, or maintenance, and—effective Oct 1, 2004—use the AT modifier for active/corrective treatment (do not use AT for maintenance) plus GA/GZ as appropriate; failure to follow these rules may result in denial.