A52.79 vs D77
A52.79 (Other symptomatic late syphilis) compared with D77 (Other disorders of blood and blood-forming organs in 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. D77 carries an Excludes1 note covering A52.79: “splenitis, splenomegaly in late syphilis (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).
Side by side
| A52.79Other symptomatic late syphilis | D77Other disorders of blood and blood-forming organs in diseases classified elsewhere | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | A00-B99 — Certain Infectious and Parasitic Diseases (A00-B99) | D50-D89 — Diseases of the Blood and Blood-forming Organs and Certain Disorders Involving the Immune Mechanism (D50-D89) |
| Definition | Other symptomatic late syphilis is a billable ICD-10-CM diagnosis code (A52.79). | Other disorders of blood and blood-forming organs in diseases classified elsewhere is a billable ICD-10-CM diagnosis code (D77). |
| Includes | Late syphilitic leukoderma Syphilis of adrenal gland Syphilis of pituitary gland Syphilis of thyroid gland | — |
| Code first | — | underlying disease, such as: amyloidosis (E85.-) |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources