2019 ICD-10-CM Diagnosis Code A27.9

Leptospirosis, unspecified

    2016 2017 2018 2019 Billable/Specific Code
  • A27.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2019 edition of ICD-10-CM A27.9 became effective on October 1, 2018.
  • This is the American ICD-10-CM version of A27.9 - other international versions of ICD-10 A27.9 may differ.
The following code(s) above A27.9 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 A27.9:
  • A00-B99
    2019 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
Approximate Synonyms
  • Leptospirosis
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.
ICD-10-CM A27.9 is grouped within Diagnostic Related Group(s) (MS-DRG v36.0):
  • 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 A27.9 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

Diagnosis Index entries containing back-references to A27.9:
  • 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 Billable/Specific Code
    Applicable To
    • Fever NOS
    • Fever of unknown origin [FUO]
    • Fever with chills
    • Fever with rigors
    • Hyperpyrexia NOS
    • Persistent fever
    • Pyrexia NOS
    • mud A27.9
    • swamp A27.9
  • Infection, infected, infective (opportunistic) B99.9
    ICD-10-CM Diagnosis Code B99.9

    Unspecified infectious disease

      2016 2017 2018 2019 Billable/Specific Code
  • Leptospirosis A27.9

ICD-10-CM Codes Adjacent To A27.9
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
A28.9 Zoonotic bacterial disease, unspecified
A30 Leprosy [Hansen's disease]
A30.0 Indeterminate leprosy
A30.1 Tuberculoid leprosy
A30.2 Borderline tuberculoid leprosy

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