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A77.4

Non-billable

Ehrlichiosis

A77.4 is the ICD-10-CM code for Ehrlichiosis. It is a non-billable category code — use a more specific child code such as A77.40 for billing.

Status
Header (non-billable)
Chapter
A00-B99
Parent
A77
Subcodes
3
Edition
FY2026

A00-B99 Certain infectious and parasitic diseases

Excludes1 — not coded here

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

Frequently asked questions

What is ICD-10 code A77.4?
A77.4 is the ICD-10-CM code for "Ehrlichiosis". It falls under A00-B99 Certain infectious and parasitic diseases.
Is A77.4 a billable code?
No — A77.4 is a non-billable header code. Use a more specific child code (such as A77.40) for billing.
What are the subcodes of A77.4?
A77.4 has 3 more specific child codes, including A77.40, A77.41, A77.49.
What is excluded from A77.4?
Excludes1 (not coded here): anaplasmosis [A. phagocytophilum] (A79.82); rickettsiosis due to Ehrlichia sennetsu (A79.81).

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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