MCMedicalCodingSoftware
L56.4

L56.4: Polymorphous light eruption

Billable / specific codeICD-10-CM

L56.4 is a billable, specific ICD-10-CM code for polymorphous light eruption. It is valid for submission on a claim.

Check L56.4 with the rest of the claim: free scrubber

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Medicare coverage

L56.4 is named in 11 Medicare coverage policies: 11 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

  • A56459Billing and Coding: Debridement Services
  • A60360Billing and Coding: Allergy Diagnostic Testing
  • A60361Billing and Coding: Allergy Diagnostic Testing
  • A60363Billing and Coding: Allergy Diagnostic Testing

Alphabetic index entries that lead here

  • Eruption›Hutchinson, summer
  • Eruption›polymorphous light(sun)
  • Hydroa›aestivale
  • Hydroa›vacciniforme
  • Prurigo›estivalis
  • Hutchinson's›disease, meaning›prurigo estivalis
  • Hutchinson's›disease, meaning›summer eruption or summer prurigo

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under L56

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.