U.S. ICD-10-CM · FY 2027

A77.41 ICD-10-CM Code: Ehrlichiosis chaffeensis [E. chaffeensis]

A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.

Code definition

Official description

A77.41

Ehrlichiosis chaffeensis [E. chaffeensis]

ICD-10-CM diagnosis code · United States clinical modification

Classification

Where A77.41 sits

  1. 1

    Chapter 1

    Certain infectious and parasitic diseases (A00-B99)

  2. 2

    Section

    Rickettsioses (A75-A79)

  3. 3

    Category A77

    Spotted fever [tick-borne rickettsioses]

  4. 4

    Subcategory A77.4

    Ehrlichiosis

  5. 5

    Code A77.41

    Ehrlichiosis chaffeensis [E. chaffeensis]

Documentation details

Notes for this code

Inclusion terms

No inclusion terms are listed for A77.41.

Code first

No “code first” instruction is listed for A77.41.

Use additional code

No “use additional code” instruction is listed for A77.41.

Excludes1

Conditions that should not be reported together with this code.

No Excludes1 note is listed for A77.41.

Excludes2

Conditions not included here that may be reported separately when present.

No Excludes2 note is listed for A77.41.

Transparency

Source and release

Data release

U.S. ICD-10-CM · FY 2027

Effective date

Oct 1, 2026

This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.

Review the CDC/NCHS ICD-10-CM source

Code-specific guidance

Frequently asked questions

What does ICD-10-CM code A77.41 mean?

A77.41 is the FY 2027 U.S. ICD-10-CM code for “Ehrlichiosis chaffeensis [E. chaffeensis].”

Is A77.41 a billable or specific ICD-10-CM code?

Yes. In the FY 2027 reference data used on this page, A77.41 has no child codes and is presented as a billable/specific code. Always confirm the active code set and payer requirements before use.

Where is A77.41 located in ICD-10-CM?

A77.41 is listed in Chapter 1, Certain infectious and parasitic diseases (A00-B99), within Rickettsioses (A75-A79) (A75–A79), under category A77, Spotted fever [tick-borne rickettsioses] and subcategory A77.4, Ehrlichiosis.

What coding notes are listed for A77.41?

No inclusion terms are listed for A77.41 in this reference record. No code-first instruction is listed. No Excludes1 note is listed. No Excludes2 note is listed.

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