ICD-10-CM diagnosis code
Q55.9 Congenital malformation of male genital organ, unspecified
- Billable
- Yes, a complete code (FY2026)
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Other codes in Q55
18 complete codes in this category.
- Q55.29Other congenital malformations of testis and scrotum
- Q55.3Atresia of vas deferens
- Q55.4Other congenital malformations of vas deferens, epididymis, seminal vesicles and prostate
- Q55.5Congenital absence and aplasia of penis
- Q55.61Curvature of penis (lateral)
- Q55.62Hypoplasia of penis
- Q55.63Congenital torsion of penis
- Q55.64Hidden penis
- Q55.69Other congenital malformation of penis
- Q55.7Congenital vasocutaneous fistula
- Q55.8Other specified congenital malformations of male genital organs
- Q55.9Congenital malformation of male genital organ, unspecified
Documentation tips
- Make sure the note supports every element of the title, “Congenital malformation of male genital organ, unspecified”: each detail in it should be traceable to the history, examination or assessment.
- Code to the highest specificity the documentation supports. If a detail is missing from the note, add it to the note rather than choosing a less specific code by default.
- Check the Tabular List and official guidelines for instructional notes (“code first”, “use additional code”, Excludes1/Excludes2) that apply to Q55.
The international WHO ICD-10 also has Q55.9, with its inclusion and exclusion notes; titles and detail can differ from ICD-10-CM.
ICD-10-CM is developed by the National Center for Health Statistics (NCHS), Centers for Disease Control and Prevention, U.S. Department of Health and Human Services, and is based on the WHO ICD-10. Codes and titles are reproduced unchanged from the FY2026 code list (effective 1 October 2025). Their use here does not imply endorsement by CDC, HHS or the U.S. Government. Changes effective on or after 1 October 2026 may not be reflected yet; check the current release at cdc.gov or cms.gov before submitting claims.
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