Omsk hemorrhagic fever

This code represents Omsk hemorrhagic fever, a severe viral zoonotic disease caused by the Omsk hemorrhagic fever virus (OHFV). It is characterized by fever, headache, myalgia, hemorrhagic manifestations (e.g., epistaxis, gingival bleeding), and in some cases, neurological symptoms. The disease is primarily transmitted through tick bites or contact with infected muskrats.

Use this code when documentation explicitly states a diagnosis of Omsk hemorrhagic fever. This diagnosis is typically made based on clinical presentation in endemic areas, supported by laboratory confirmation (e.g., PCR, serology) of OHFV infection. It is applicable for both confirmed and suspected cases where clinical evidence strongly points to this specific viral illness.

• Ensure documentation specifies "Omsk hemorrhagic fever" to differentiate from other viral hemorrhagic fevers.
• Consider additional codes for specific hemorrhagic manifestations or neurological complications if documented.
• Do not confuse with other tick-borne diseases unless Omsk hemorrhagic fever is explicitly diagnosed.