ICD-10-CM · Chapter 1 · A00–B99
A77.4
Ehrlichiosis
Certain infectious and parasitic diseases
Heads up:this is a parent code. It's typically not directly billable — you need to drill down to a more specific child code (one with additional digits) to use on a claim.
Quick facts
- Code
- A77.4
- Type
- Category / header (non-billable)
- ICD-10-CM chapter
- Chapter 1 — Certain infectious and parasitic diseases
- Category
- A77 — Spotted fever [tick-borne rickettsioses]
- Specificity
- 4 characters
How coders use this code
ICD-10-CM A77.4 is a category (header) for ehrlichiosis. It is generally not reported directly on a claim — coders drill down to a more specific child code (one with additional characters) that matches the documentation. Use the related codes below to find the billable code that fits, and verify against the annual NCHS/CMS guidelines.
Related codes in A77
- A77Spotted fever [tick-borne rickettsioses]
- A77.0Spotted fever due to Rickettsia rickettsii
- A77.1Spotted fever due to Rickettsia conorii
- A77.2Spotted fever due to Rickettsia siberica
- A77.3Spotted fever due to Rickettsia australis
- A77.40Ehrlichiosis, unspecified
- A77.41Ehrlichiosis chaffeensis [E. chaffeensis]
- A77.49Other ehrlichiosis
- A77.8Other spotted fevers
- A77.9Spotted fever, unspecified
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