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ICD-10 Code L52: Erythema nodosum

L52 is a billable ICD-10 diagnosis code used to classify Erythema nodosum in medical records and claims. You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records. 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).

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 erythema nodosum 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
L49-L54Urticaria and erythema
currentL49-L54

Official coding notes

Excludes1 (do not code together)
  • tuberculous erythema nodosum (A18.4)

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

Coding guidelines

Compatibility

Legacy and official ICD code match exactly.
Legacy codes
L52

Common synonyms

Erythema nodosum

Frequently asked questions

Code details

CodeL52
SystemICD10
Display nameErythema nodosum
ChapterDiseases of the skin and subcutaneous tissue (L00-L99)
BlockUrticaria and erythema

Flags

BillableYes
Valid clinical useYes

Source

SourceICD-10
Version2026-annual
Releaseannual
Year2026

Index terms

Matched terms
Arthritis, arthritic(acute) (chronic) (nonpyogenic) (subacute)Arthritis, arthritic(acute) (chronic) (nonpyogenic) (subacute)ArthropathyDermatitis(eczematous)Erythema, erythematous(infectional) (inflammation)Erythema, erythematous(infectional) (inflammation)
See also
subcategory M14.8-

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.