M01 vs M02.3
M01 (Direct infections of joint in infectious and parasitic diseases classified elsewhere) compared with M02.3 (Reiter's disease), 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. M01 carries an Excludes1 note covering M02.3: “postinfective arthropathy (M02.-)”
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. M01 carries an Excludes1 note covering M02.3: “reactive arthritis (M02.3)”
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. M02.3 carries an Excludes1 note covering M01: “direct infections of joint in infectious and parasitic diseases classified elsewhere (M01.-)”
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
| M01Direct infections of joint in infectious and parasitic diseases classified elsewhere | M02.3Reiter's disease | |
|---|---|---|
| Billing status | Non-billable header | Non-billable header |
| Classification | M00-M99 — Diseases of the Musculoskeletal System and Connective Tissue (M00-M99) | M00-M99 — Diseases of the Musculoskeletal System and Connective Tissue (M00-M99) |
| Definition | Direct infections of joint in infectious and parasitic diseases classified elsewhere is a non-billable ICD-10-CM category code (M01). | Reiter's disease is a non-billable ICD-10-CM category code (M02.3). |
| Includes | — | Reactive arthritis |
| Code first | underlying disease, such as: leprosy [Hansen's disease] (A30.-) | underlying disease, such as: congenital syphilis [Clutton's joints] (A50.5) |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources