M27.5Periradicular pathology associated with previous endodontic treatment

M27.5 is the ICD-10-CM diagnosis code for periradicular pathology associated with previous endodontic treatment. It belongs to category M27 (other diseases of jaws), block M26-M27 (dentofacial anomalies [including malocclusion] and other disorders of jaw) and chapter 13 (diseases of the musculoskeletal system and connective tissue). It is a header code, so it can't be reported by itself; one of its 4 subcodes must be used instead.

Within M27 (other diseases of jaws), M27.5 is specifically for periradicular pathology associated with previous endodontic treatment. Related codes cover developmental disorders of jaws (M27.0), giant cell granuloma, central (M27.1), inflammatory conditions of jaws (M27.2), alveolitis of jaws (M27.3), other and unspecified cysts of jaw (M27.4), endosseous dental implant failure (M27.6), other specified diseases of jaws (M27.8) and disease of jaws, unspecified (M27.9).

To report this condition, pick the subcode that matches the documentation: M27.51 (treatment), M27.52 (overfill), M27.53 (underfill) and M27.59 (treatment).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.