A18.4 vs M32
A18.4 (Tuberculosis of skin and subcutaneous tissue) compared with M32 (Systemic lupus erythematosus (SLE)), 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. A18.4 carries an Excludes2 note covering M32: “systemic lupus erythematosus (M32.-)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Side by side
| A18.4Tuberculosis of skin and subcutaneous tissue | M32Systemic lupus erythematosus (SLE) | |
|---|---|---|
| Billing status | Billable | Non-billable header |
| Classification | A00-B99 — Certain Infectious and Parasitic Diseases (A00-B99) | M00-M99 — Diseases of the Musculoskeletal System and Connective Tissue (M00-M99) |
| Definition | Tuberculosis of skin and subcutaneous tissue is a billable ICD-10-CM diagnosis code (A18.4). | Systemic lupus erythematosus (SLE) is a non-billable ICD-10-CM category code (M32). |
| Includes | infections due to Mycobacterium tuberculosis and Mycobacterium bovis Erythema induratum, tuberculous Lupus exedens Lupus vulgaris NOS | autoimmune disease NOS collagen (vascular) disease NOS systemic autoimmune disease systemic collagen (vascular) disease |
| Use additional code | code, if applicable, for associated cachexia (E88.A) | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources