Certain infectious and parasitic diseases
Certain zoonotic bacterial diseases
2020 ICD-10-CM Diagnosis Code A21.9
2016 2017 2018 2019 2020 Billable/Specific Code
- A21.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
- The 2020 edition of ICD-10-CM A21.9 became effective on October 1, 2019.
- 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
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 A21.9
ICD-10-CM A21.9 is grouped within Diagnostic Related Group(s) (MS-DRG v37.0):
- 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.
- 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-CM
- 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
ICD-10-CM Codes Adjacent To A21.9
Other forms of plague
Other forms of tularemia
Other forms of anthrax
Brucellosis due to Brucella melitensis
Brucellosis due to Brucella abortus
Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.