D58.2 vs D74
D58.2 (Other hemoglobinopathies) compared with D74 (Methemoglobinemia), 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. D58.2 carries an Excludes1 note covering D74: “methemoglobinemia (D74.-)”
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
| D58.2Other hemoglobinopathies | D74Methemoglobinemia | |
|---|---|---|
| Billing status | Billable | Non-billable header |
| Classification | D50-D89 — Diseases of the Blood and Blood-forming Organs and Certain Disorders Involving the Immune Mechanism (D50-D89) | D50-D89 — Diseases of the Blood and Blood-forming Organs and Certain Disorders Involving the Immune Mechanism (D50-D89) |
| Definition | Other hemoglobinopathies is a billable ICD-10-CM diagnosis code (D58.2). | Methemoglobinemia is a non-billable ICD-10-CM category code (D74). |
| Includes | Abnormal hemoglobin NOS Congenital Heinz body anemia Hb-C disease Hb-D disease | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources