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ICD-10-CM Codes
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A00-B99
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A75-A79
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A77-
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2023 ICD-10-CM Diagnosis Code A77.0
2023 ICD-10-CM Diagnosis Code A77.0
Spotted fever due to Rickettsia rickettsii
2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
- A77.0 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
- The 2023 edition of ICD-10-CM A77.0 became effective on October 1, 2022.
- This is the American ICD-10-CM version of A77.0 - other international versions of ICD-10 A77.0 may differ.
Applicable To- Rocky Mountain spotted fever
- Sao Paulo fever
The following code(s) above
A77.0 contain annotation back-references
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
A77.0:
Approximate Synonyms
- Rocky mountain spotted fever
Clinical Information
- Acute, infectious, sometimes fatal disease caused by rickettsia rickettsii usually transmitted by ixodid ticks; occurs only in north and south america; manifestations include chills, fever, rash, headache, myalgia, and prostration.
- An acute febrile illness caused by rickettsia rickettsii. It is transmitted to humans by bites of infected ticks and occurs only in north and south america. Characteristics include a sudden onset with headache and chills and fever lasting about two to three weeks. A cutaneous rash commonly appears on the extremities and trunk about the fourth day of illness.
ICD-10-CM A77.0 is grouped within Diagnostic Related Group(s) (MS-DRG v40.0):
- 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 A77.0 to ICD-9-CM
Code History
- 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
- 2021 (effective 10/1/2020): No change
- 2022 (effective 10/1/2021): No change
- 2023 (effective 10/1/2022): No change
- Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor) R50.9
ICD-10-CM Diagnosis Code R50.9
Fever, unspecified
2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
Applicable To- Fever NOS
- Fever of unknown origin [FUO]
- Fever with chills
- Fever with rigors
- Hyperpyrexia NOS
- Persistent fever
- Pyrexia NOS
- American
- mountain - see also Brucellosis
- meaning Rocky Mountain spotted fever A77.0
- spotted A77.9
ICD-10-CM Diagnosis Code A77.9
Spotted fever, unspecified
2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
- due to Rickettsia
- American A77.0
- Brazilian A77.0
- Colombian A77.0
- Rocky Mountain A77.0
- Bullis A77.0
- Lone Star A77.0
- Rocky Mountain spotted A77.0
- Sao Paulo A77.0
- Lone Star fever A77.0
- Rocky Mountain A77.0 (spotted)
- Sao Paulo fever or typhus A77.0
- Typhus (fever) A75.9
ICD-10-CM Diagnosis Code A75.9
Typhus fever, unspecified
2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
ICD-10-CM Codes Adjacent To A77.0
A74.89 Other chlamydial diseases
A74.9 Chlamydial infection, unspecified
A75.0 Epidemic louse-borne typhus fever due to Rickettsia prowazekii
A75.1 Recrudescent typhus [Brill's disease]
A75.2 Typhus fever due to Rickettsia typhi
A75.3 Typhus fever due to Rickettsia tsutsugamushi
A75.9 Typhus fever, unspecified
A77 Spotted fever [tick-borne rickettsioses]
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
A77.41 …… chafeensis [E. chafeensis]
A77.8 Other spotted fevers
A77.9 Spotted fever, unspecified
Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.