A27.9
BillableLeptospirosis, unspecified
Leptospirosis, unspecified
Coding Notes
Includes
Conditions included under this code
- diseases generally recognized as communicable or transmissible
Excludes 1
Codes that cannot be used together with this code (mutual exclusion)
- certain localized infections - see body system-related chapters
Excludes 2
Conditions not included here, but the patient may have both
Use Additional Code
Additional codes that should follow this code
ICD-11 Equivalents(1)
ICD-11 Equivalents
View full mappingCorresponding ICD-11 codes from the WHO crosswalk mapping
Also Known As / Clinical Terms(92)
SNOMED CT
- Abortion due to Leptospira16038004
- Miscarriage due to Leptospira16038004
- Anicteric leptospirosis32266007
- Benign leptospirosis32266007
- Cane cutter's fever77377001
- Harvest fever77377001
- Infection due to Leptospira77377001
- Japanese autumnal fever77377001
- Leptospirosis77377001
- Queensland fever77377001
- Rice-field worker's disease77377001
- Seven day fever77377001
- Spirochaetal jaundice77377001
- Spirochetal jaundice77377001
- Leptospirosis leptospiraemic phase79309005
- Leptospirosis leptospiremic phase79309005
- Leptospirosis immune phase80194003
- Non-pyogenic bacterial infection of skin238417000
- Leptospiral rash240673004
- Leptospirosis with cutaneous involvement402959002
- Leptospira infection of the central nervous system406589003
- Encephalitis caused by Leptospira840440006
- Leptospira encephalitis840440006
- Pulmonary haemorrhage due to leptospirosis871841000
- Pulmonary hemorrhage due to leptospirosis871841000
- Intracranial haemorrhage due to leptospirosis871842007
- Intracranial hemorrhage due to leptospirosis871842007
UMLS
- Cane cutter's feverC0023364
- Harvest feverC0023364
- Infection due to LeptospiraC0023364
- Infection, LeptospiraC0023364
- Infections, LeptospiraC0023364
- Japanese autumnal feverC0023364
- Leptospira InfectionC0023364
- Leptospira InfectionsC0023364
- Leptospira infectionsC0023364
- LeptospirosesC0023364
- LeptospirosisC0023364
- Leptospirosis (disorder)C0023364
- Leptospirosis, unspecifiedC0023364
- Queensland feverC0023364
- Rice-field worker's diseaseC0023364
- Spirochaetal jaundiceC0023364
- Spirochetal jaundiceC0023364
- Stuttgart DiseaseC0023364
- Weil DiseaseC0023364
- fort bragg feverC0023364
- leptospirosesC0023364
- leptospirosisC0023364
- mud feverC0023364
- queensland feverC0023364
- red water feverC0023364
- spirochaetal jaundiceC0023364
- swamp feverC0023364
Clinical Terms
- Leptospirosis leptospiraemic phase
- Queensland fever
- Benign leptospirosis
- Miscarriage due to Leptospira
- Leptospiral rash
- Non-pyogenic bacterial infection of skin
- Weil Disease
- Cane cutter's fever
- Japanese autumnal fever
- Intracranial hemorrhage due to leptospirosis
- Pulmonary haemorrhage due to leptospirosis
- Leptospirosis immune phase
- red water fever
- Rice-field worker's disease
- Pulmonary hemorrhage due to leptospirosis
- Leptospira Infection
- Harvest fever
- Spirochaetal jaundice
- Leptospira infection of the central nervous system
- Stuttgart Disease
- Infections, Leptospira
- Infection, Leptospira
- Leptospiroses
- fort bragg fever
- Leptospirosis with cutaneous involvement
- mud fever
- Leptospira infections
- Leptospira encephalitis
- Leptospirosis (disorder)
- Leptospirosis leptospiremic phase
- Anicteric leptospirosis
- Spirochetal jaundice
- Intracranial haemorrhage due to leptospirosis
- Seven day fever
- Encephalitis caused by Leptospira
- swamp fever
- Abortion due to Leptospira
- Infection due to Leptospira
Frequently Asked Questions
What is the ICD-10 code for leptospirosis, unspecified?
The ICD-10-CM code for leptospirosis, unspecified is A27.9. The full clinical description is "Leptospirosis, unspecified". A27.9 is a billable/specific code that can be used on insurance claims and medical billing.
What does ICD-10 code A27.9 mean?
ICD-10-CM code A27.9 represents “Leptospirosis, unspecified”. It is classified under Chapter 1: Certain Infectious and Parasitic Diseases and is a billable/specific code that can be used on a claim.
Is A27.9 a billable code?
Yes, A27.9 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.
What chapter is A27.9 in?
A27.9 is in Chapter 1: Certain Infectious and Parasitic Diseases (codes A00-B99).
What codes cannot be used with A27.9?
A27.9 has Excludes1 notes indicating codes that cannot be used together with it, including: certain localized infections - see body system-related chapters.
Are additional codes required with A27.9?
Yes, when using A27.9, also report: resistance to antimicrobial drugs (Z16.-).
What SNOMED CT codes does A27.9 map to?
A27.9 maps to 12 SNOMED CT concepts: 16038004, 32266007, 77377001, 840440006, 871842007, and 7 more. SNOMED CT is a clinical terminology used in electronic health records.
What are the UMLS CUIs for A27.9?
A27.9 is linked to 1 UMLS Concept Unique Identifier: C0023364. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does A27.9 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like leptospirosis, unspecified affect a person's functioning — body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.
What is the ICD-11 equivalent of A27.9?
A27.9 maps to the ICD-11 code: 1B91 (Leptospirosis).
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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.