ICD-10-CM 2027
ICD-10 code for mutilans psoriatic arthropathy
From the official ICD-10-CM alphabetic index entry “Arthropathy › mutilans (psoriatic)”. Page updated September 29, 2026.
About coding mutilans psoriatic arthropathy
The ICD-10-CM code for mutilans psoriatic arthropathy is L40.52 (Psoriatic arthritis mutilans).
Within L40.5 (Arthropathic psoriasis), L40.52 is specifically for psoriatic arthritis mutilans. Related codes cover unspecified (L40.50), distal interphalangeal psoriatic arthropathy (L40.51), psoriatic spondylitis (L40.53), psoriatic juvenile arthropathy (L40.54) and other psoriatic arthropathy (L40.59).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 545 (Connective Tissue Disorders with MCC, relative weight 2.3892), DRG 546 (Connective Tissue Disorders with CC, relative weight 1.1745) and DRG 547 (Connective Tissue Disorders without CC/MCC, relative weight 0.7526), in MDC 08 (Diseases and Disorders of the Musculoskeletal System and Connective Tissue), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about mutilans psoriatic arthropathy ICD-10 codes
What is the ICD-10 code for mutilans psoriatic arthropathy?
- L40.52 — Psoriatic arthritis mutilans.
Is L40.52 billable?
- Yes. L40.52 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can L40.52 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict L40.52 as a principal diagnosis.
Is L40.52 a CC or MCC?
- No. L40.52 is neither a CC nor an MCC under MS-DRG v44.0.