N80.35Endometriosis of the pelvic sidewall, unspecified depth

N80.35 is the ICD-10-CM diagnosis code for endometriosis of the pelvic sidewall, unspecified depth. It belongs to category N80 (endometriosis), block N80-N98 (noninflammatory disorders of female genital tract) and chapter 14 (diseases of the genitourinary system). It is a header code, so it can't be reported by itself; one of its 4 subcodes must be used instead.

Within N80.3, choose N80.35 (Endometriosis of the pelvic sidewall, unspecified depth) only when documentation doesn't support a more specific option: unspecified (N80.30), endometriosis of the anterior cul-de-sac (N80.31), endometriosis of the posterior cul-de-sac (N80.32), superficial endometriosis of the pelvic sidewall (N80.33), deep endometriosis of the pelvic sidewall (N80.34), superficial endometriosis of the pelvic brim (N80.36), deep endometriosis of the pelvic brim (N80.37), endometriosis of the pelvic brim, unspecified depth (N80.38) and 4 more.

To report this condition, pick the subcode that matches the documentation: N80.351 (depth), N80.352 (depth), N80.353 (depth) and N80.359 (depth).

It was added in FY2023, effective October 1, 2022.