ICD-10 Code A77

Spotted fever [tick-borne rickettsioses]

Version 2019 Non-Billable Code
ICD-10: A77
Short Description:Spotted fever [tick-borne rickettsioses]
Long Description:Spotted fever [tick-borne rickettsioses]

Not Valid for Submission

ICD-10 A77 is a "header" nonspecific and non-billable code code, consider using a code with a higher level of specificity for a diagnosis of spotted fever [tick-borne rickettsioses]. The code is NOT valid for the year 2019 for the submission of HIPAA-covered transactions.

Consider the following ICD-10 codes with a higher level of specificity:

  • A77.0 - Spotted fever due to Rickettsia rickettsii
  • A77.1 - Spotted fever due to Rickettsia conorii
  • A77.2 - Spotted fever due to Rickettsia siberica
  • A77.3 - Spotted fever due to Rickettsia australis
  • A77.4 - Ehrlichiosis
  • A77.40 - Ehrlichiosis, unspecified
  • A77.41 - Ehrlichiosis chafeensis [E. chafeensis]
  • A77.49 - Other ehrlichiosis
  • A77.8 - Other spotted fevers
  • A77.9 - Spotted fever, unspecified

Code Classification

  • Certain infectious and parasitic diseases (A00–B99)
    • Rickettsioses (A75-A79)
      • Spotted fever [tick-borne rickettsioses] (A77)

Information for Patients


Bacterial Infections

Bacteria are living things that have only one cell. Under a microscope, they look like balls, rods, or spirals. They are so small that a line of 1,000 could fit across a pencil eraser. Most bacteria won't hurt you - less than 1 percent of the different types make people sick. Many are helpful. Some bacteria help to digest food, destroy disease-causing cells, and give the body needed vitamins. Bacteria are also used in making healthy foods like yogurt and cheese.

But infectious bacteria can make you ill. They reproduce quickly in your body. Many give off chemicals called toxins, which can damage tissue and make you sick. Examples of bacteria that cause infections include Streptococcus, Staphylococcus, and E. coli.

Antibiotics are the usual treatment. When you take antibiotics, follow the directions carefully. Each time you take antibiotics, you increase the chances that bacteria in your body will learn to resist them causing antibiotic resistance. Later, you could get or spread an infection that those antibiotics cannot cure.

NIH: National Institute of Allergy and Infectious Diseases

  • Actinomycosis (Medical Encyclopedia)
  • Bacterial vaginosis -- aftercare (Medical Encyclopedia)
  • Blood culture (Medical Encyclopedia)
  • Gram stain (Medical Encyclopedia)
  • Gram stain of skin lesion (Medical Encyclopedia)
  • Necrotizing soft tissue infection (Medical Encyclopedia)

[Learn More]

Tick Bites

If you spend time outdoors or have pets that go outdoors, you need to beware of ticks. Ticks are small bloodsucking parasites. Many species transmit diseases to animals and people. Some of the diseases you can get from a tick bite are Lyme disease, ehrlichiosis, Rocky Mountain spotted fever and tularemia.

Some ticks are so small that they can be difficult to see. Ticks may get on you if you walk through areas where they live, such as tall grass, leaf litter or shrubs.

Tick-borne diseases occur worldwide, including in your own backyard. To help protect yourself and your family, you should

  • Use a chemical repellent with DEET, permethrin or picaridin
  • Wear light-colored protective clothing
  • Tuck pant legs into socks
  • Avoid tick-infested areas
  • Check yourself, your children and your pets daily for ticks and carefully remove any ticks you find
  • Colorado tick fever (Medical Encyclopedia)
  • Ehrlichiosis (Medical Encyclopedia)
  • Rocky Mountain spotted fever (Medical Encyclopedia)
  • Tick bite (Medical Encyclopedia)
  • Tick paralysis (Medical Encyclopedia)
  • Tick removal (Medical Encyclopedia)
  • Tularemia (Medical Encyclopedia)

[Learn More]

ICD-10 Footnotes

General Equivalence Map Definitions
The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.

  • Approximate Flag - The approximate flag is on, indicating that the relationship between the code in the source system and the code in the target system is an approximate equivalent.
  • No Map Flag - The no map flag indicates that a code in the source system is not linked to any code in the target system.
  • Combination Flag - The combination flag indicates that more than one code in the target system is required to satisfy the full equivalent meaning of a code in the source system.