ICD-10-CM 2027
ICD-10 code for bowel endometriosis
From the official ICD-10-CM alphabetic index entry “Endometriosis › bowel”. Page updated September 29, 2026.
About coding bowel endometriosis
The ICD-10-CM code for bowel endometriosis is N80.50 (Endometriosis of intestine, unspecified).
Within N80.5, choose N80.50 (unspecified) only when documentation doesn't support a more specific option: the rectum (N80.51), the sigmoid colon (N80.52), the cecum (N80.53), the appendix (N80.54), other parts of the colon (N80.55) and the small intestine (N80.56).
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 391 (Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders with MCC, relative weight 1.2392) and DRG 392 (Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders without MCC, relative weight 0.7645), in MDC 06 (Diseases and Disorders of the Digestive 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.
Common questions about bowel endometriosis ICD-10 codes
What is the ICD-10 code for bowel endometriosis?
- N80.50 — Endometriosis of intestine, unspecified.
Is N80.50 billable?
- Yes. N80.50 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can N80.50 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict N80.50 as a principal diagnosis.
Is N80.50 a CC or MCC?
- No. N80.50 is neither a CC nor an MCC under MS-DRG v44.0.