A69.2 vs L52
A69.2 (Lyme disease) compared with L52 (Erythema nodosum), 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. L52 carries an Excludes1 note covering A69.2: “Lyme disease (A69.2-)”
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
| A69.2Lyme disease | L52Erythema nodosum | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| Classification | A00-B99 — Certain Infectious and Parasitic Diseases (A00-B99) | L00-L99 — Diseases of the Skin and Subcutaneous Tissue (L00-L99) |
| Definition | Lyme disease is a non-billable ICD-10-CM category code (A69.2). | Erythema nodosum is a billable ICD-10-CM diagnosis code (L52). |
| Includes | Erythema chronicum migrans due to Borrelia burgdorferi | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources