ICD-10-CM 2027 diagnosis code

N36.4Urethral functional and muscular disorders

Not billable — use a more specific code

N36.4 is a header code, so it can't be reported by itself. Choose one of the 4 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About N36.4

N36.4 is the ICD-10-CM diagnosis code for urethral functional and muscular disorders. It belongs to category N36 (other disorders of urethra), 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 4 subcodes must be used instead.

Within N36 (other disorders of urethra), N36.4 is specifically for urethral functional and muscular disorders. Related codes cover urethral fistula (N36.0), urethral diverticulum (N36.1), urethral caruncle (N36.2), urethral false passage (N36.5), other specified disorders of urethra (N36.8) and urethral disorder, unspecified (N36.9).

To report this condition, pick the subcode that matches the documentation: N36.41 (urethra), N36.42 ((ISD)), N36.43 (deficiency) and N36.44 (urethra).

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

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

Specific codes under N36.4

Coding notes

Use additional codeAdd a secondary code to fully describe the condition

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

Notes that apply from higher levels

Instructions written at a parent level also apply to N36.4.

Broader instructions also apply from N30-N39 Other diseases of the urinary system and Chapter 14: Diseases of the genitourinary system.

Code history

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2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about N36.4

Is N36.4 billable?: No. N36.4 is a header code. Report one of its more specific subcodes instead.