ICD-10-CM > N00-N99 > N30-N39 > N36 > N36.4 N36.4 Urethral functional and muscular disorders Non-Billable/Non-Specific Use Additional code to identify associated urinary stress incontinence (N39.3) Codes N36.41Hypermobility of urethraN36.42Intrinsic sphincter deficiency (ISD)N36.43Combined hypermobility of urethra and intrinsic sphincter deficiencyN36.44Muscular disorders of urethra