ICD10BillableValid for clinical use
ICD-10 Code L40.9: Psoriasis, unspecified
Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026
What is this code?
ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Diseases of the skin and subcutaneous tissue (L00-L99).
When is it used?
- May be used when a clinician documents psoriasis, unspecified in a patient's medical record.
- May appear in hospital records, claims, referrals, and clinical documentation.
- This code can be used as a clinically usable diagnosis entry in standardized coding workflows.
What it does not mean
- A code alone does not explain severity, treatment plan, or outcome.
- A medical code should not be treated as a substitute for a doctor's diagnosis or advice.
Code hierarchy
chapter
12Diseases of the skin and subcutaneous tissue (L00-L99)
block
L40-L45Papulosquamous disorders
category
L40Psoriasis
currentL40
Where you may see this code
You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.
Related specialists
Dermatologist
Related codes
Sibling codes
Coverage-related procedures and services
CPT 82306high
VITAMIN D; 25 HYDROXY, INCLUDES FRACTION(S), IF PERFORMED
Source: CMS coverage guidance
CPT 82652high
VITAMIN D; 1, 25 DIHYDROXY, INCLUDES FRACTION(S), IF PERFORMED
Source: CMS coverage guidance
HCPCS J1745high
INJECTION, INFLIXIMAB, EXCLUDES BIOSIMILAR, 10 MG
Source: CMS coverage guidance
HCPCS Q5104high
INJECTION, INFLIXIMAB-ABDA, BIOSIMILAR, (RENFLEXIS), 10 MG
Source: CMS coverage guidance
HCPCS Q5121high
INJECTION, INFLIXIMAB-AXXQ, BIOSIMILAR, (AVSOLA), 10 MG
Source: CMS coverage guidance
HCPCS Q5103high
INJECTION, INFLIXIMAB-DYYB, BIOSIMILAR, (INFLECTRA), 10 MG
Source: CMS coverage guidance
Mapped diagnoses and classifications
SNOMED_CT 1296646001high
Exacerbation of psoriasis
Source: SNOMED International ICD-10 map
SNOMED_CT 402317005high
Generalised psoriasis
Source: SNOMED International ICD-10 map
SNOMED_CT 402334002high
Late onset psoriasis type 2
Source: SNOMED International ICD-10 map
SNOMED_CT 402321003high
Non-pustular psoriasis of hands
Source: SNOMED International ICD-10 map
SNOMED_CT 402324006high
Non-pustular psoriasis of hands and feet
Source: SNOMED International ICD-10 map
SNOMED_CT 402332003high
Onset of psoriasis in adolescence (10-20 years)
Source: SNOMED International ICD-10 map
Coding guidelines
Compatibility
Legacy and official ICD code match exactly.
Legacy codes
L40.9
Common synonyms
Psoriasis, unspecifiedPsoriasis
Frequently asked questions
About this content
This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.