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ICD-10-CM 2027 diagnosis code

L40Psoriasis

Not billable — use a more specific code

L40 is a header code, so it can't be reported by itself. Choose one of the 8 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About L40

L40 is the ICD-10-CM diagnosis code for psoriasis. It belongs to 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 8 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: L40.0 (vulgaris), L40.1 (psoriasis), L40.2 (continua), L40.3 (plantaris), L40.4 (psoriasis), L40.5 (psoriasis), L40.8 (psoriasis) and L40.9 (unspecified).

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

Notes that apply from higher levels

Instructions written at a parent level also apply to L40.

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

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about L40

Is L40 billable?

No. L40 is a header code. Report one of its more specific subcodes instead.