ICD-10-CM 2027
ICD-10 code for bladder hypertony
From the official ICD-10-CM alphabetic index entry “Hypertony, hypertonia, hypertonicity › bladder”. Page updated September 29, 2026.
About coding bladder hypertony
The ICD-10-CM code for bladder hypertony is N31.8 (Other neuromuscular dysfunction of bladder).
Within N31, choose N31.8 (Other neuromuscular dysfunction of bladder) only when documentation doesn't support a more specific option: Uninhibited neuropathic bladder, not elsewhere classified (N31.0), reflex neuropathic bladder, not elsewhere classified (N31.1), flaccid neuropathic bladder, not elsewhere classified (N31.2) and neuromuscular dysfunction of bladder, unspecified (N31.9).
Use an additional code to identify any associated urinary incontinence (N39.3-N39.4-).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
Common questions about bladder hypertony ICD-10 codes
What is the ICD-10 code for bladder hypertony?
- N31.8 — Other neuromuscular dysfunction of bladder.
Is N31.8 billable?
- Yes. N31.8 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can N31.8 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict N31.8 as a principal diagnosis.
Is N31.8 a CC or MCC?
- No. N31.8 is neither a CC nor an MCC under MS-DRG v44.0.