ICD-10-CM 2027
ICD-10 code for penis agenesis
From the official ICD-10-CM alphabetic index entry “Agenesis › penis”. Page updated September 29, 2026.
About coding penis agenesis
The ICD-10-CM code for penis agenesis is Q55.5 (Congenital absence and aplasia of penis).
Within Q55 (other congenital malformations of male genital organs), Q55.5 is specifically for congenital absence and aplasia of penis. Related codes cover absence and aplasia of testis (Q55.0), hypoplasia of testis and scrotum (Q55.1), other and unspecified congenital malformations of testis and scrotum (Q55.2), atresia of vas deferens (Q55.3), other congenital malformations of vas deferens, epididymis, seminal vesicles and prostate (Q55.4), other congenital malformations of penis (Q55.6), congenital vasocutaneous fistula (Q55.7), other specified congenital malformations of male genital organs (Q55.8) 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 729 (Other Male Reproductive System Diagnoses with CC/MCC, relative weight 1.0544) and DRG 730 (Other Male Reproductive System Diagnoses without CC/MCC, relative weight 0.6597), in MDC 12 (Diseases and Disorders of the Male 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.
Common questions about penis agenesis ICD-10 codes
What is the ICD-10 code for penis agenesis?
- Q55.5 — Congenital absence and aplasia of penis.
Is Q55.5 billable?
- Yes. Q55.5 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Q55.5 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict Q55.5 as a principal diagnosis.
Is Q55.5 a CC or MCC?
- No. Q55.5 is neither a CC nor an MCC under MS-DRG v44.0.