100.9 LEPTOSPIROSIS NOS


Code Information

Diagnosis Code: 100.9

Short Description: Leptospirosis NOS

Long Description: Leptospirosis, unspecified

Code Classification:

  • Infectious and parasitic diseases (001–139)
    • Other spirochetal diseases (100-104)
      • 100 Leptospirosis
        • 100.9 Leptospirosis NOS

Code Version: 2015 ICD-9-CM


References to Index of Diseases and Injuries

The code 100.9 has the following ICD-9-CM references to the Index of Diseases and Injuries
  • Infection, infected, infective (opportunistic) 136.9
    • leptospira (see also Leptospirosis) 100.9
      • australis 100.89
      • bataviae 100.89
      • pyrogenes 100.89
      • specified type NEC 100.89
    • leptospirochetal NEC (see also Leptospirosis) 100.9
  • Leptospirosis 100.9
    • autumnalis 100.89
    • canicula 100.89
    • grippotyphosa 100.89
    • hebdomidis 100.89
    • icterohemorrhagica 100.0
    • nanukayami 100.89
    • pomona 100.89
    • Weil's disease 100.0

Crosswalk Information

The code 100.9 converts into the following ICD-10 code(s):
ICD-9 Code ICD-10 Code ICD-10 Description
100.9 Right Arrow A27.9 Leptospirosis, unspecified
This ICD-9 to ICD-10 data is based on the 2018 General Equivalency Mapping (GEM) files published by the Centers for Medicare & Medicaid Services (CMS) for informational purposes only. The data is not an ICD-10 conversion tool and doesn’t guarantee clinical accuracy.

Similar Codes

ICD-9 Code ICD-9 Description
100.0 Leptospirosis icterohemorrhagica
100.81 Leptospiral meningitis (aseptic)
100.89 Other specified leptospiral infections


This page was last updated on: 10/1/2014