ICD-10-CM 2027
ICD-10 code for bladder neck atresia
Other atresia and stenosis of urethra and bladder neck
From the official ICD-10-CM alphabetic index entry “Atresia, atretic › bladder (neck)”. Page updated September 29, 2026.
About coding bladder neck atresia
The ICD-10-CM code for bladder neck atresia is Q64.39 (Other atresia and stenosis of urethra and bladder neck). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on Q64.39.
Within Q64.3, choose Q64.39 (Other atresia and stenosis of urethra and bladder neck) only when documentation doesn't support a more specific option: congenital bladder neck obstruction (Q64.31), congenital stricture of urethra (Q64.32) and congenital stricture of urinary meatus (Q64.33).
As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.
In MS-DRG v44.0, it is part of the grouping logic for DRG 698 (Other Kidney and Urinary Tract Diagnoses with MCC, relative weight 1.6398), DRG 699 (Other Kidney and Urinary Tract Diagnoses with CC, relative weight 1.0003) and DRG 700 (Other Kidney and Urinary Tract Diagnoses without CC/MCC, relative weight 0.6741), in MDC 11 (Diseases and Disorders of the Kidney and Urinary Tract), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific bladder neck atresia codes (official index)
- obstruction Q64.31 — Congenital bladder neck obstruction
Common questions about bladder neck atresia ICD-10 codes
What is the ICD-10 code for bladder neck atresia?
- Q64.39 — Other atresia and stenosis of urethra and bladder neck. More specific codes apply when the documentation supports them: Q64.31.
What is the ICD-10 code for obstruction bladder neck atresia?
- Q64.31 — Congenital bladder neck obstruction.
Is Q64.39 billable?
- Yes. Q64.39 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Q64.39 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict Q64.39 as a principal diagnosis.
Is Q64.39 a CC or MCC?
- Q64.39 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.