A52.77 vs H75.0
A52.77 (Syphilis of bone and joint) compared with H75.0 (Mastoiditis in infectious and parasitic diseases classified elsewhere), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. H75.0 carries an Excludes1 note covering A52.77: “syphilis (A52.77)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| A52.77Syphilis of bone and joint | H75.0Mastoiditis in infectious and parasitic diseases classified elsewhere | |
|---|---|---|
| Billing status | Billable | Non-billable header |
| Classification | A00-B99 — Certain Infectious and Parasitic Diseases (A00-B99) | H60-H95 — Diseases of the Ear and Mastoid Process (H60-H95) |
| Definition | Syphilis of bone and joint is a billable ICD-10-CM diagnosis code (A52.77). | Mastoiditis in infectious and parasitic diseases classified elsewhere is a non-billable ICD-10-CM category code (H75.0). |
| Code first | — | underlying disease |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources