ICD-10-CM 2027
ICD-10 code for uterus anomaly
From the official ICD-10-CM alphabetic index entry “Anomaly, anomalous (congenital) (unspecified type) › uterus”. Page updated September 29, 2026.
About coding uterus anomaly
The ICD-10-CM code for uterus anomaly is Q51.9 (Congenital malformation of uterus and cervix, unspecified). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on Q51.9.
Within Q51, choose Q51.9 (Congenital malformation of uterus and cervix, unspecified) only when documentation doesn't support a more specific option: agenesis and aplasia of uterus (Q51.0), doubling of uterus with doubling of cervix and vagina (Q51.1), other doubling of uterus (Q51.2), Bicornate uterus (Q51.3), Unicornate uterus (Q51.4), agenesis and aplasia of cervix (Q51.5), Embryonic cyst of cervix (Q51.6), congenital fistulae between uterus and digestive and urinary tracts (Q51.7) and 1 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.
More specific uterus anomaly codes (official index)
- with only one functioning horn Q51.4 — Unicornate uterus
Common questions about uterus anomaly ICD-10 codes
What is the ICD-10 code for uterus anomaly?
- Q51.9 — Congenital malformation of uterus and cervix, unspecified. More specific codes apply when the documentation supports them: Q51.4.
Is Q51.9 billable?
- Yes. Q51.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Q51.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict Q51.9 as a principal diagnosis.
Is Q51.9 a CC or MCC?
- No. Q51.9 is neither a CC nor an MCC under MS-DRG v44.0.