ICD-10-CM 2027
ICD-10 code for Acystia
From the official ICD-10-CM alphabetic index entry “Acystia”. Page updated September 29, 2026.
About coding Acystia
The ICD-10-CM code for Acystia is Q64.5 (Congenital absence of bladder and urethra).
Within Q64 (other congenital malformations of urinary system), Q64.5 is specifically for congenital absence of bladder and urethra. Related codes cover epispadias (Q64.0), exstrophy of urinary bladder (Q64.1), congenital posterior urethral valves (Q64.2), other atresia and stenosis of urethra and bladder neck (Q64.3), malformation of urachus (Q64.4), congenital diverticulum of bladder (Q64.6), other and unspecified congenital malformations of bladder and urethra (Q64.7), other specified congenital malformations of urinary system (Q64.8) 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 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.
Common questions about Acystia ICD-10 codes
What is the ICD-10 code for Acystia?
- Q64.5 — Congenital absence of bladder and urethra.
Is Q64.5 billable?
- Yes. Q64.5 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Q64.5 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict Q64.5 as a principal diagnosis.
Is Q64.5 a CC or MCC?
- No. Q64.5 is neither a CC nor an MCC under MS-DRG v44.0.