2025 ICD-10-CM Diagnosis Code A77.41

Ehrlichiosis chaffeensis [E. chaffeensis]

• A77.41 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
• ICD-10-CM A77.41 is a revised 2025 ICD-10-CM code that became effective on October 1, 2024.
• This is the American ICD-10-CM version of A77.41 – other international versions of ICD-10 A77.41 may differ.

The following code(s) above A77.41 contain annotation back-references

 that may be applicable to A77.41:

• A00-B99  Certain infectious and parasitic diseases
• A77.4  Ehrlichiosis

Approximate Synonyms

• Ehrlichiosis due to ehrlichia chafeensis
• Ehrlichiosis due to erhlichia chafeensis
• Human ehrlichiosis due to ehrlichia chaffeensis

ICD-10-CM A77.41 is grouped within Diagnostic Related Group(s) (MS-DRG v42.0):

• 867 Other infectious and parasitic diseases diagnoses with mcc
• 868 Other infectious and parasitic diseases diagnoses with cc
• 869 Other infectious and parasitic diseases diagnoses without cc/mcc

Convert A77.41 to ICD-9-CMCode History

• 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
• 2017 (effective 10/1/2016): No change
• 2018 (effective 10/1/2017): No change
• 2019 (effective 10/1/2018): No change
• 2020 (effective 10/1/2019): No change
• 2021 (effective 10/1/2020): No change
• 2022 (effective 10/1/2021): No change
• 2023 (effective 10/1/2022): No change
• 2024 (effective 10/1/2023): No change
• 2025 (effective 10/1/2024): Revised code
  • New description: Ehrlichiosis chaffeensis [E. chaffeensis]
  • 2024 description: Ehrlichiosis chafeensis [E. chafeensis]

Diagnosis Index entries containing back-references to A77.41:

• EhrlichiosisA77.40
  • due to
    • E. chaffeensis A77.41
• Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor) R50.9
  • spottedA77.9
    • EhrlichiosisA77.40
      • due to
        • E. chaffeensis A77.41