ICD-10 code for rectovaginal septum endometriosis

The ICD-10-CM code for rectovaginal septum endometriosis is N80.40 (Endometriosis of rectovaginal septum, unspecified involvement of vagina). The official index lists 2 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on N80.40.

Within N80.4, choose N80.40 (septum, unspecified involvement of vagina) only when documentation doesn't support a more specific option: septum without involvement of vagina (N80.41) and septum with involvement of vagina (N80.42).

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.