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A55

A55: Chlamydial lymphogranuloma (venereum)

Billable / specific codeICD-10-CM

A55 is a billable, specific ICD-10-CM code for chlamydial lymphogranuloma (venereum). It is valid for submission on a claim.

Check A55 with the rest of the claim: free scrubber

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

  • Climatic or tropical bubo
  • Durand-Nicolas-Favre disease
  • Esthiomene
  • Lymphogranuloma inguinale

Other codes that can never be billed with A55

Their own Excludes1 notes name this code, so the conflict is not listed above.

  • A74Other diseases caused by chlamydiae

Risk adjustment

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

Medicare coverage

A55 is named in 2 Medicare coverage policies: 2 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

  • A56456Billing and Coding: Colonoscopy/Sigmoidoscopy/Proctosigmoidoscopy
  • A56632Billing and Coding: Colonoscopy/Sigmoidoscopy/Proctosigmoidoscopy

Alphabetic index entries that lead here

  • Durand-Nicolas-Favre disease
  • Esthiomene
  • Frei's disease
  • Genito-anorectal syndrome
  • Lymphopathia venereum, veneris
  • Nicolas-Favre disease(-Durand)
  • Poradenitis, nostras inguinalis or venerea
  • Bubo›climatic
  • Bubo›tropical
  • Disease, diseased›Durand-Nicholas-Favre(climatic bubo)
  • Disease, diseased›Favre-Durand-Nicolas(climatic bubo)
  • Disease, diseased›Frei's(climatic bubo)

Code history

Unchanged in every release from FY2024 to FY2027.

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.