N31Neuromuscular dysfunction of bladder, not elsewhere classified

N31 is the ICD-10-CM diagnosis code for neuromuscular dysfunction of bladder, not elsewhere classified. It belongs to block N30-N39 (other diseases of the urinary system) and chapter 14 (diseases of the genitourinary system). It is a header code, so it can't be reported by itself; one of its 5 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: N31.0 (classified), N31.1 (classified), N31.2 (classified), N31.8 (bladder) and N31.9 (unspecified).

Don't report N31 together with the conditions in its Excludes1 note: cord bladder NOS (G95.89), neurogenic bladder due to cauda equina syndrome (G83.4) and neuromuscular dysfunction due to spinal cord lesion (G95.89).

Use an additional code to identify any associated urinary incontinence (N39.3-N39.4-).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.