A770 - Rocky Mountain spotted fever - a serious tick-borne bacterial infection

International Classification of Diseases

Last updated: 10/3/2025

What is a ICD-10 Code?

ICD-10 (International Classification of Diseases, 10th Revision) codes are used to classify and code all diagnoses, symptoms, and procedures recorded in association with hospital care. These codes provide a standardized way to track health conditions and their treatment outcomes.

Detailed Description

This code indicates a diagnosis of Rocky Mountain spotted fever, which is caused by bacteria called Rickettsia rickettsii. This infection is transmitted through the bite of infected ticks, particularly the American dog tick and Rocky Mountain wood tick. Despite its name, this disease occurs throughout the United States, not just in the Rocky Mountain region. Symptoms typically include sudden onset of fever, headache, muscle aches, and a characteristic spotted rash that usually appears 2-5 days after fever begins. The rash often starts on wrists and ankles, then spreads to the rest of the body. This is a serious condition that requires prompt antibiotic treatment, as it can be life-threatening if left untreated. Early diagnosis and treatment with antibiotics like doxycycline are crucial for recovery.

Additional Information

This is a potentially fatal disease if not treated promptly. Early treatment with appropriate antibiotics is essential. The associated lab test code suggests diagnostic testing was performed to confirm the diagnosis. Patients should seek immediate medical attention if they develop fever, headache, and rash after potential tick exposure.

Category

Infectious Disease

Medical Specialty

Infectious Disease, Emergency Medicine, Family Medicine

Expected Costs

Your actual cost will depend on your insurance coverage, provider location, and specific circumstances.

What's Required Before This

  • Tick exposure history
  • Clinical symptoms assessment
  • Laboratory confirmation tests

What to Expect After

  • Complete prescribed antibiotic course
  • Monitor for symptom improvement
  • Follow-up appointment to ensure recovery
  • Education on tick prevention measures

Why Understanding This Code Matters

On Your Medical Bill

This code appears on your medical bills to identify the specific service, procedure, drug, or medical diagnosis you received. Understanding what it means helps you verify you're being charged correctly and know what to expect.

For Your Health

Knowing what this code represents helps you understand your treatment plan, ask better questions during appointments, and track your healthcare journey more effectively.

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