2021 ICD-10-CM Diagnosis Code A27

Leptospirosis

    2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
  • A27 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • The 2021 edition of ICD-10-CM A27 became effective on October 1, 2020.
  • This is the American ICD-10-CM version of A27 - other international versions of ICD-10 A27 may differ.
The following code(s) above A27 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 A27:
  • A00-B99
    2021 ICD-10-CM Range A00-B99

    Certain infectious and parasitic diseases

    Includes
    • diseases generally recognized as communicable or transmissible
    Type 1 Excludes
    • certain localized infections - see body system-related chapters
    Type 2 Excludes
    • carrier or suspected carrier of infectious disease (Z22.-)
    • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
    • infectious and parasitic diseases specific to the perinatal period (P35-P39)
    • influenza and other acute respiratory infections (J00-J22)
    Use Additional
    • code to identify resistance to antimicrobial drugs (Z16.-)
    Certain infectious and parasitic diseases
Clinical Information
  • A contagious bacterial infection caused by spirochetes of the genus leptospira. Humans are infected by contact with water and soil which have been contaminated with animal waste products. The signs and symptoms include an initial flu-like phase, followed by a second phase in which patients may develop meningitis, liver failure and renal failure.
  • Infections with bacteria of the genus leptospira.
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
ICD-10-CM Codes Adjacent To A27
A24.9 Melioidosis, unspecified
A25 Rat-bite fevers
A25.0 Spirillosis
A25.1 Streptobacillosis
A25.9 Rat-bite fever, unspecified
A26 Erysipeloid
A26.0 Cutaneous erysipeloid
A26.7 Erysipelothrix sepsis
A26.8 Other forms of erysipeloid
A26.9 Erysipeloid, unspecified
A27 Leptospirosis
A27.0 Leptospirosis icterohemorrhagica
A27.8 Other forms of leptospirosis
A27.81 Aseptic meningitis in leptospirosis
A27.89 Other forms of leptospirosis
A27.9 Leptospirosis, unspecified
A28 Other zoonotic bacterial diseases, not elsewhere classified
A28.0 Pasteurellosis
A28.1 Cat-scratch disease
A28.2 Extraintestinal yersiniosis
A28.8 Other specified zoonotic bacterial diseases, not elsewhere classified

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.