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A77.40

A77.40: Ehrlichiosis, unspecified

Billable / specific codeICD-10-CM

A77.40 is a billable, specific ICD-10-CM code for ehrlichiosis, unspecified. It is valid for submission on a claim.

Check A77.40 with the rest of the claim: free scrubber

Excludes1 inherited from the categories above A77.40

A category’s note binds every code beneath it.

Written on A77.4: Ehrlichiosis

  • anaplasmosis [A. phagocytophilum] (A79.82)
  • rickettsiosis due to Ehrlichia sennetsu (A79.81)

Risk adjustment

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

Medicare coverage

A77.40 is named in 4 Medicare coverage policies: 4 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

  • A58710Billing and Coding: MolDX: Molecular Syndromic Panels for Infectious Disease Pathogen Identification Testing
  • A58720Billing and Coding: MolDX: Molecular Syndromic Panels for Infectious Disease Pathogen Identification Testing
  • A58747Billing and Coding: MolDX: Molecular Syndromic Panels for Infectious Disease Pathogen Identification Testing
  • A58761Billing and Coding: MolDX: Molecular Syndromic Panels for Infectious Disease Pathogen Identification Testing

Alphabetic index entries that lead here

  • Ehrlichiosis
  • Fever›spotted›Ehrlichiosis

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under A77.4

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.