ICD-10 Code L40.50 – Arthropathic psoriasis, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L40.50 – Arthropathic psoriasis, unspecified
What it is
L40.50 identifies psoriatic arthritis when the record does not specify a subtype. Use it for joint disease associated with psoriasis when documentation is nonspecific.
Clinical signs
Common findings include inflammatory joint pain, swelling, stiffness, and psoriasis history or plaques. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents arthropathic psoriasis, psoriatic arthritis, or psoriatic arthropathy without further detail. It is appropriate when the note confirms joint involvement linked to psoriasis but does not name the affected joints, pattern, or severity. Check documentation if the record is unclear.
Do not use for
Do not use it for psoriasis without joint disease, or for a more specific psoriatic arthritis code when the chart identifies a subtype. Do not assign it if the diagnosis is not confirmed.
Coding tip
Look for explicit provider wording tying arthritis to psoriasis before assigning L40.50.