ICD-10 code for endometriosis

The ICD-10-CM code for endometriosis is N80.9 (Endometriosis, unspecified). The official index lists 137 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on N80.9.

Within N80, choose N80.9 (unspecified) only when documentation doesn't support a more specific option: of uterus (N80.0), of ovary (N80.1), of fallopian tube (N80.2), of pelvic peritoneum (N80.3), of rectovaginal septum and vagina (N80.4), of intestine (N80.5), in cutaneous scar (N80.6), other endometriosis (N80.8) and 4 more.

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 742 (Uterine and Adnexa Procedures for Non-Malignancy with CC/MCC, relative weight 1.8456), DRG 743 (Uterine and Adnexa Procedures for Non-Malignancy without CC/MCC, relative weight 1.2974), DRG 760 (Menstrual and Other Female Reproductive System Disorders with CC/MCC, relative weight 1.0129) and DRG 761 (Menstrual and Other Female Reproductive System Disorders without CC/MCC, relative weight 0.7041), in MDC 13 (Diseases and Disorders of the Female Reproductive 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.