Q55.0 Absence and aplasia of testis

Billable ICD-10-CM code, FY2026. Exempt from present-on-admission (POA) reporting.

Applicable to

• Monorchism

Applies from Q55 Other congenital malformations of male genital organs

Excludes1 (never code together)

• congenital hydrocele (P83.5)
• hypospadias (Q54.-)

MS-DRG index

Defines the logic of DRG(s) 729-730 in MDC 12.

Approximate ICD-9-CM (GEMs)

• 752.89 Other specified anomalies of genital organs (approximate)

Diagnosis Index entries for Q55.0

• Absence (of) (organ or part) (complete or partial) › testis (congenital)
• Agenesis › testicle
• Anorchia, anorchism, anorchidism
• Aplasia › testicle
• Malformation (congenital) › testis and scrotum › aplasia
• Monorchism, monorchidism

Nearby codes

• Q55 Other congenital malformations of male genital organs
• Q55.0 Absence and aplasia of testis (this code)
• Q55.1 Hypoplasia of testis and scrotum
• Q55.2 Other and unspecified congenital malformations of testis and scrotum
• Q55.20 Unspecified congenital malformations of testis and scrotum
• Q55.21 Polyorchism
• Q55.22 Retractile testis