ICD-9-CM 021.9 is a billable medical code that can be used to indicate a diagnosis on a reimbursement claim, however, 021.9 should only be used for claims with a date of service on or before September 30, 2015. For claims with a date of service on or after October 1, 2015, use an equivalent ICD-10-CM code (or codes).
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