CMT is a form of manual treatment to influence joint and neurophysiological function.

When similar or identical procedures are performed, but are qualified by an increased level of complexity:

• Only the definitive or most comprehensive service performed should be reported
• Only one CMT service of the spinal region (procedures 98940-98942)
  or extraspinal region (98943) is eligible for payment on a single date
  of service.
• Payment is limited to one clinically indicated and medically
  necessary physical medicine modality or procedure code per patient, per
  date of service.
• Payment is allowed for one clinically indicated and medically
  necessary extraspinal manipulation code (i.e., 98943-51) in combination
  with a spinal manipulation code (i.e., 98940, 98941, or 98942) per date
  of service.

The chiropractic manipulative treatment codes include a
pre-manipulation patient assessment. Additional E/M services may be
reported separately using modifier 25, if the member’s condition
requires a significant separately identifiable E/M service, above and
beyond the usual pre-service and post-service work associated with the
procedure.

When multiple procedures are performed at the same session by the
same provider, the modifier 51 may be appended to the additional CPT
codes (excluding E/M codes).

Refer to the Chiropractic Modalities section for a complete listing of CPT physical medicine modality and procedure codes