A64 vs N34
A64 (Unspecified sexually transmitted disease) compared with N34 (Urethritis and urethral syndrome), from the official CMS tabular data. Both may be reported when both conditions are documented (Excludes2).
Can these codes be reported together?
Yes, when both are documented. N34 carries an Excludes2 note covering A64: “urethritis in diseases with a predominantly sexual mode of transmission (A50-A64)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Side by side
| A64Unspecified sexually transmitted disease | N34Urethritis and urethral syndrome | |
|---|---|---|
| Billing status | Billable | Non-billable header |
| Classification | A00-B99 — Certain Infectious and Parasitic Diseases (A00-B99) | N00-N99 — Diseases of the Genitourinary System (N00-N99) |
| Definition | Unspecified sexually transmitted disease is a billable ICD-10-CM diagnosis code (A64). | Urethritis and urethral syndrome is a non-billable ICD-10-CM category code (N34). |
| Use additional code | — | code (B95-B97), to identify infectious agent. |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources