L40.54 vs M08.9A
L40.54 (Psoriatic juvenile arthropathy) compared with M08.9A (Juvenile arthritis, unspecified, other specified site), 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. M08.9A carries an Excludes1 note covering L40.54: “psoriatic juvenile arthropathy (L40.54)”
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
| L40.54Psoriatic juvenile arthropathy | M08.9AJuvenile arthritis, unspecified, other specified site | |
|---|---|---|
| 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 | Psoriatic juvenile arthropathy is a billable ICD-10-CM diagnosis code (L40.54). | Juvenile arthritis, unspecified, other specified site is a billable ICD-10-CM diagnosis code (M08.9A). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources