N31 – Neuromuscular dysfunction of bladder, not elsewhere classified

ICD-10-CM 2027 diagnosis code · Other diseases of the urinary system

Non-billable header

ICD-10-CM code N31

Code: N31 (claims format: N31)
Description: Neuromuscular dysfunction of bladder, not elsewhere classified
Short description: Neuromuscular dysfunction of bladder, NEC
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 14. Diseases of the genitourinary system (N00-N99)
Block: N30-N39 Other diseases of the urinary system

Billable codes under N31

N31 is a header code and cannot be used on claims. Choose the most specific code:

Notes for N31

Excludes1 (not coded here):

cord bladder NOS (G95.89)
neurogenic bladder due to cauda equina syndrome (G83.4)
neuromuscular dysfunction due to spinal cord lesion (G95.89)

Use additional code:

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

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

Block N30-N39

Excludes2 (not included here):

urinary infection (complicating):
abortion or ectopic or molar pregnancy (O00-O07, O08.8)
pregnancy, childbirth and the puerperium (O23.-, O75.3, O86.2-)

Frequently asked questions

What is ICD-10 code N31?

N31 is the ICD-10-CM code for neuromuscular dysfunction of bladder, not elsewhere classified, in the block N30-N39 (Other diseases of the urinary system).

Is N31 a billable code?

No. N31 is a header code with more specific child codes; report one of the billable codes listed above.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.