A51.39 vs A52.79
A51.39 (Other secondary syphilis of skin) compared with A52.79 (Other symptomatic late syphilis), 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. A51.39 carries an Excludes1 note covering A52.79: “late syphilitic leukoderma (A52.79)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
No — do not report together. A52.79 carries an Excludes1 note covering A51.39: “syphilitic leukoderma (secondary) (A51.39)”
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
| A51.39Other secondary syphilis of skin | A52.79Other symptomatic late syphilis | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | A00-B99 — Certain Infectious and Parasitic Diseases (A00-B99) | A00-B99 — Certain Infectious and Parasitic Diseases (A00-B99) |
| Definition | Other secondary syphilis of skin is a billable ICD-10-CM diagnosis code (A51.39). | Other symptomatic late syphilis is a billable ICD-10-CM diagnosis code (A52.79). |
| Includes | Syphilitic leukoderma Syphilitic mucous patch | Late syphilitic leukoderma Syphilis of adrenal gland Syphilis of pituitary gland Syphilis of thyroid gland |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources