Leptospirosis (A27) ICD-10-CM
The A27 code range covers leptospirosis with 6 ICD-10-CM diagnosis codes. 4 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Codes in the A27 Range 6 codes · 4 billable
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the A27 range.
Leptospirosis
Infections with bacteria of the genus LEPTOSPIRA.
Weil Disease
A severe form of LEPTOSPIROSIS, usually caused by LEPTOSPIRA INTERROGANS SEROVAR ICTEROHAEMORRHAGIAE and occasionally other serovars. It is transmitted to humans by the rat and is characterized by hemorrhagic and renal symptoms with accompanying JAUNDICE.
About the A27 Code Range
Leptospirosis is an infection caused by Leptospira bacteria.
The subdivisions separate a named form, other forms, and unspecified leptospirosis. A27.0 identifies leptospirosis icterohemorrhagica. A27.8 groups other forms: A27.81 identifies aseptic meningitis in leptospirosis, and A27.89 identifies other forms. A27.9 identifies unspecified leptospirosis.
Questions About This Page
How many billable codes are in the A27 range?
Of the 6 codes in this range, 4 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the A27 range classify?
The range classifies leptospirosis. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
