N36.4 – Urethral functional and muscular disorders

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

Non-billable header

ICD-10-CM code N36.4

Code: N36.4 (claims format: N364)
Description: Urethral functional and muscular disorders
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
Parent codes: N36

Billable codes under N36.4

N36.4 is a header code and cannot be used on claims. Choose the most specific code:

N36.41 – Hypermobility of urethraBillable
N36.42 – Intrinsic sphincter deficiency (ISD)Billable
N36.43 – Combined hypermobility of urethra and intrinsic sphincter deficiencyBillable
N36.44 – Muscular disorders of urethraBillable

Notes for N36.4

Use additional code:

code to identify associated urinary stress incontinence (N39.3)

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-)

Related codes in N36

N36.0 – Urethral fistulaBillable
N36.1 – Urethral diverticulumBillable
N36.2 – Urethral caruncleBillable
N36.5 – Urethral false passageBillable
N36.8 – Other specified disorders of urethraBillable
N36.9 – Urethral disorder, unspecifiedBillable

Frequently asked questions

What is ICD-10 code N36.4?

N36.4 is the ICD-10-CM code for urethral functional and muscular disorders, in the block N30-N39 (Other diseases of the urinary system).

Is N36.4 a billable code?

No. N36.4 is a header code with more specific child codes; report one of the billable codes listed above.

What category does N36.4 belong to?

It belongs to category N36 – Other disorders of urethra.

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.