Papulosquamous disorders (L40-L45)
chapter 12: Diseases of the Skin and Subcutaneous Tissue
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Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
Covers assigning pressure ulcer codes by site and stage, including unstageable, healing, healed, and progressing ulcers, and coding healing or progressing non-pressure chronic ulcers.
- Pressure ulcer stage codes (page 58)
- Non-Pressure Chronic Ulcers (page 60)
All codes under L40-L45
L40-L45 can't be used on a claim. Pick a billable code below; grey headings group them.
- L40Psoriasis
- L40.0Psoriasis vulgaris
- L40.1Generalized pustular psoriasis
- L40.2Acrodermatitis continua
- L40.3Pustulosis palmaris et plantaris
- L40.4Guttate psoriasis
- L40.5Arthropathic psoriasis
- L40.50Arthropathic psoriasis, unspecified
- L40.51Distal interphalangeal psoriatic arthropathy
- L40.52Psoriatic arthritis mutilans
- L40.53Psoriatic spondylitis
- L40.54Psoriatic juvenile arthropathy
- L40.59Other psoriatic arthropathy
- L40.8Other psoriasis
- L40.9Psoriasis, unspecified
- L41Parapsoriasis
- L41.0Pityriasis lichenoides et varioliformis acuta
- L41.1Pityriasis lichenoides chronica
- L41.3Small plaque parapsoriasis
- L41.4Large plaque parapsoriasis
- L41.5Retiform parapsoriasis
- L41.8Other parapsoriasis
- L41.9Parapsoriasis, unspecified
- L42Pityriasis rosea
- L43Lichen planus
- L43.0Hypertrophic lichen planus
- L43.1Bullous lichen planus
- L43.2Lichenoid drug reaction
- L43.3Subacute (active) lichen planus
- L43.8Other lichen planus
- L43.9Lichen planus, unspecified
- L44Other papulosquamous disorders
- L44.0Pityriasis rubra pilaris
- L44.1Lichen nitidus
- L44.2Lichen striatus
- L44.3Lichen ruber moniliformis
- L44.4Infantile papular acrodermatitis [Gianotti-Crosti]
- L44.8Other specified papulosquamous disorders
- L44.9Papulosquamous disorder, unspecified
- L45Papulosquamous disorders in diseases classified elsewhere
L40-L45 MS-DRGs
This code does not group to an MS-DRG as a principal diagnosis.
About the condition
Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.
Psoriasis
Psoriasis is a skin disease that causes itchy or sore patches of thick, red skin with silvery scales. You usually get the patches on your elbows, knees, scalp, back, face, palms and feet, but they can show up on other parts of your body. Some people who have psoriasis also get a form of arthritis called psoriatic arthritis.
Read more about psoriasis on MedlinePlus