Q51: Congenital malformations of uterus and cervix

Codes under Q51 (Congenital malformations of uterus and cervix). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.

Code	Description	Billable
Q51.0	Agenesis and aplasia of uterus	✓
Q51.1	Doubling of uterus with doubling of cervix and vagina	—
Q51.2	Other 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 cervix	—
Q51.9	Congenital malformation of uterus and cervix, unspecified	✓
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	✓
Q51.21	Complete doubling of uterus	✓
Q51.22	Partial doubling of uterus	✓
Q51.28	Other and unspecified doubling of uterus	✓
Q51.81	Other congenital malformations of uterus	—
Q51.82	Other congenital malformations of cervix	—
Q51.810	Arcuate uterus	✓
Q51.811	Hypoplasia of uterus	✓
Q51.818	Other congenital malformations of uterus	✓
Q51.820	Cervical duplication	✓
Q51.821	Hypoplasia of cervix	✓
Q51.828	Other congenital malformations of cervix	✓

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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.

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