M35.6 vs M79.3
M35.6 (Relapsing panniculitis [Weber-Christian]) compared with M79.3 (Panniculitis, unspecified), 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. M35.6 carries an Excludes1 note covering M79.3: “panniculitis NOS (M79.3-)”
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. M79.3 carries an Excludes1 note covering M35.6: “relapsing [Weber-Christian] panniculitis (M35.6)”
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
| M35.6Relapsing panniculitis [Weber-Christian] | M79.3Panniculitis, unspecified | |
|---|---|---|
| Billing status | Billable | Billable |
| 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 | Relapsing panniculitis [Weber-Christian] is a billable ICD-10-CM diagnosis code (M35.6). | Panniculitis, unspecified is a billable ICD-10-CM diagnosis code (M79.3). |
| Includes | autoimmune disease NOS collagen (vascular) disease NOS systemic autoimmune disease systemic collagen (vascular) disease | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources