Certain infectious and parasitic diseases
Certain zoonotic bacterial diseases
2019 ICD-10-CM Diagnosis Code A21
2016 2017 2018 2019 Non-Billable/Non-Specific Code
- A21 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
- The 2019 edition of ICD-10-CM A21 became effective on October 1, 2018.
- This is the American ICD-10-CM version of A21 - other international versions of ICD-10 A21 may differ.
"Includes" further defines, or give examples of, the content of the code or category.
- deer-fly fever
- infection due to Francisella tularensis
- rabbit fever
The following code(s) above A21
contain annotation back-references
In this context, annotation back-references refer to codes that contain:
- Applicable To annotations, or
- Code Also annotations, or
- Code First annotations, or
- Excludes1 annotations, or
- Excludes2 annotations, or
- Includes annotations, or
- Note annotations, or
- Use Additional annotations
that may be applicable to A21
- 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.
- 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
ICD-10-CM Codes Adjacent To A21
Other miliary tuberculosis
Miliary tuberculosis, unspecified
Other forms of plague
Other forms of tularemia
Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.