ICD-10-CM 2027
ICD-10 code for vagina endometriosis
Endometriosis of rectovaginal septum with involvement of vagina
From the official ICD-10-CM alphabetic index entry “Endometriosis › vagina”. Page updated September 29, 2026.
About coding vagina endometriosis
The ICD-10-CM code for vagina endometriosis is N80.42 (Endometriosis of rectovaginal septum with involvement of vagina).
Within N80.4 (endometriosis of rectovaginal septum and vagina), N80.42 is specifically for endometriosis of rectovaginal septum with involvement of vagina. Related codes cover septum, unspecified involvement of vagina (N80.40) and septum without involvement of vagina (N80.41).
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.
Common questions about vagina endometriosis ICD-10 codes
What is the ICD-10 code for vagina endometriosis?
- N80.42 — Endometriosis of rectovaginal septum with involvement of vagina.
Is N80.42 billable?
- Yes. N80.42 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can N80.42 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict N80.42 as a principal diagnosis.
Is N80.42 a CC or MCC?
- No. N80.42 is neither a CC nor an MCC under MS-DRG v44.0.