Congenital malformations of uterus and cervix (Q51) ICD-10-CM
The Q51 code range covers congenital malformations of uterus and cervix with 24 ICD-10-CM diagnosis codes. 18 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Codes in the Q51 Range 24 codes · 18 billable
- Q51 Congenital malformations of uterus and cervixNon-billable
- Q51.0 Agenesis and aplasia of uterus
- Q51.1 Doubling of uterus with doubling of cervix and vaginaNon-billable
- Q51.10 Doubling of uterus with doubling of cervix and vagina without obstruction
- Q51.11 Doubling of uterus with doubling of cervix and vagina with obstruction
- Q51.2 Other doubling of uterusNon-billable
- Q51.21 Complete doubling of uterus
- Q51.22 Partial doubling of uterus
- Q51.28 Other and unspecified doubling of uterus
- Q51.3 Bicornate uterus
- Q51.4 Unicornate uterus
- Q51.5 Agenesis and aplasia of cervix
- Q51.6 Embryonic cyst of cervix
- Q51.7 Congenital fistulae between uterus and digestive and urinary tracts
- Q51.8 Other congenital malformations of uterus and cervixNon-billable
- Q51.81 Other congenital malformations of uterusNon-billable
- Q51.810 Arcuate uterus
- Q51.811 Hypoplasia of uterus
- Q51.818 Other congenital malformations of uterus
- Q51.82 Other congenital malformations of cervixNon-billable
- Q51.820 Cervical duplication
- Q51.821 Hypoplasia of cervix
- Q51.828 Other congenital malformations of cervix
- Q51.9 Congenital malformation of uterus and cervix, unspecified
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the Q51 range.
Bicornuate Uterus
A congenital uterine anomaly in which the UTERUS is divided into two uterine horns with a significant cleft at the uterine fundus due to partial fusion of the MULLERIAN DUCTS. Bicornuate uterus is sometimes associated with a longitudinal vaginal septum and abnormal development of renal tracts.
About the Q51 Code Range
ICD-10 code Q51 covers congenital malformations of the uterus and cervix, identifying specific developmental abnormalities present from birth. These codes are vital for coding conditions such as absence, duplication, or abnormal formation of uterine and cervical structures.
This section includes individual codes for various congenital uterine malformations like Q51.0, representing agenesis and aplasia of the uterus, also known by terms such as Mayer Rokitansky Küster Hauser syndrome type 1 or congenital absence of uterus. Codes Q51.10 and Q51.11 denote doubling of uterus with cervical and vaginal duplication, distinguished by obstruction presence or absence. Other specific forms include the bicornate uterus (Q51.3), unicornate uterus (Q51.4), and hypoplasia of uterus or cervix (Q51.811, Q51.821). The code cluster also identifies rarer conditions such as embryonic cysts of the cervix (Q51.6) and congenital fistulae between the uterus and digestive or urinary tracts (Q51.7). When the exact malformation is unspecified, Q51.9 is used. These codes help health professionals and coders document and communicate specific congenital uterine and cervical anomalies accurately.
Questions About This Page
How many billable codes are in the Q51 range?
Of the 24 codes in this range, 18 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the Q51 range classify?
The range classifies congenital malformations of uterus and cervix. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
