ICD-10-CM 2027 diagnosis code

L40.5Arthropathic psoriasis

Not billable — use a more specific code

L40.5 is a header code, so it can't be reported by itself. Choose one of the 6 more specific codes beneath it.

Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS, effective October 1, 2026. Updated September 29, 2026. About our data

About L40.5

L40.5 is the ICD-10-CM diagnosis code for Arthropathic psoriasis. It belongs to category L40 (psoriasis), block L40-L45 (papulosquamous disorders) and chapter 12 (diseases of the skin and subcutaneous tissue). It is a header code, so it can't be reported by itself; one of its 6 subcodes must be used instead.

Within L40 (psoriasis), L40.5 is specifically for Arthropathic psoriasis. Related codes cover vulgaris (L40.0), generalized pustular psoriasis (L40.1), acrodermatitis continua (L40.2), Pustulosis palmaris et plantaris (L40.3), Guttate psoriasis (L40.4), other psoriasis (L40.8) and unspecified (L40.9).

To report this condition, pick the subcode that matches the documentation: L40.50 (unspecified), L40.51 (arthropathy), L40.52 (mutilans), L40.53 (spondylitis), L40.54 (arthropathy) and L40.59 (arthropathy).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under L40.5

Notes that apply from higher levels

Instructions written at a parent level also apply to L40.5.

Broader instructions also apply from Chapter 12: Diseases of the skin and subcutaneous tissue.

Codes whose notes reference L40.5

M07Excludes1

Code history

2016
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2021
2022
2023
2024
2025
2026
2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about L40.5

Is L40.5 billable?: No. L40.5 is a header code. Report one of its more specific subcodes instead.