2024 ICD-10-CM Diagnosis Code A21

Tularemia

  • A21 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • The 2024 edition of ICD-10-CM A21 became effective on October 1, 2023.
  • This is the American ICD-10-CM version of A21 – other international versions of ICD-10 A21 may differ.

Includes

  • deer-fly fever
  • infection due to Francisella tularensis
  • rabbit fever

The following code(s) above A21 contain annotation back-references

 that may be applicable to A21:

  • A00-B99  Certain infectious and parasitic diseases

Clinical Information

  • A plague-like disease of rodents, transmissible to man. It is caused by francisella tularensis and is characterized by fever, chills, headache, backache, and weakness.
  • A serious gram-negative bacterial infection caused by francisella tularensis. It is transmitted to humans through bites from infected insects, inhaling airborne bacteria, handling infected animals, or consuming contaminated food or water. Signs and symptoms include skin ulcers, mouth sores, lymphadenopathy, sore throat, fever and pneumonia.
  • Disease caused by francisella tularensis and transmitted to man from rodents through the bite of a deer fly, chrysops discalis, and other bloodsucking insects; symptoms consist of a prolonged fever and often swelling of the lymph nodes; rabbits are important reservoir hosts.

Code 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