2024 ICD-10-CM Diagnosis Code A21.9

by

Tularemia, unspecified

  • A21.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2024 edition of ICD-10-CM A21.9 became effective on October 1, 2023.
  • This is the American ICD-10-CM version of A21.9 – other international versions of ICD-10 A21.9 may differ.

The following code(s) above A21.9 contain annotation back-references

 that may be applicable to A21.9:

  • A00-B99  Certain infectious and parasitic diseases
  • A21  Tularemia

Approximate Synonyms

  • Tularemia

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.

ICD-10-CM A21.9 is grouped within Diagnostic Related Group(s) (MS-DRG v41.0):

  • 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 A21.9 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

Diagnosis Index entries containing back-references to A21.9: