ICD-10 code for diaphragm endometriosis

The ICD-10-CM code for diaphragm endometriosis is N80.B39 (Endometriosis of diaphragm, unspecified depth). The official index lists 3 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on N80.B39.

Within N80.B3, choose N80.B39 (unspecified depth) only when documentation doesn't support a more specific option: superficial endometriosis of diaphragm (N80.B31) and deep endometriosis of diaphragm (N80.B32).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 205 (Other Respiratory System Diagnoses with MCC, relative weight 1.8244) and DRG 206 (Other Respiratory System Diagnoses without MCC, relative weight 0.9257), in MDC 04 (Diseases and Disorders of the Respiratory System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.