Q55
Q55 — Other congenital malformations of male genital organs
Non-billable headerICD-10-CM
Q55 is a non-billable header ICD-10-CM code for other congenital malformations of male genital organs. It cannot be billed on its own: choose one of the more specific child codes below.
Other codes that can never be billed with Q55
These codes carry an Excludes1 note pointing at Q55. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading Q55 alone.
Risk adjustment
Q55 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Code history
Q55 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.
Code to one of these instead Q55
10 child codes. Green means billable.
- Q55.0Absence and aplasia of testis
- Q55.1Hypoplasia of testis and scrotum
- Q55.2Other and unspecified 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
- Q55.6Other congenital malformations of penis
- Q55.7Congenital vasocutaneous fistula
- Q55.8Other specified congenital malformations of male genital organs
- Q55.9Congenital malformation of male genital organ, unspecified
Questions about Q55
- Is Q55 a billable ICD-10-CM code?
- No. Q55 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does Q55 sit in the tabular list?
- Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0), in the block Congenital malformations of genital organs (Q50-Q56).
- What cannot be coded together with Q55?
- Q55 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter.