L87.1 vs M35.2
L87.1 (Reactive perforating collagenosis) compared with M35.2 (Behçet'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. M35.2 carries an Excludes1 note covering L87.1: “reactive perforating collagenosis (L87.1)”
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
| L87.1Reactive perforating collagenosis | M35.2Behçet's disease | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | L00-L99 — Diseases of the Skin and Subcutaneous Tissue (L00-L99) | M00-M99 — Diseases of the Musculoskeletal System and Connective Tissue (M00-M99) |
| Definition | Reactive perforating collagenosis is a billable ICD-10-CM diagnosis code (L87.1). | Behçet's disease is a billable ICD-10-CM diagnosis code (M35.2). |
| 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