Specific code 2015 ICD-9-CM Diagnosis Code 100.9
Leptospirosis, unspecified
  • 2015
  • Billable Thru Sept 30/2015
  • Non-Billable On/After Oct 1/2015

  • ICD-9-CM 100.9 is a billable medical code that can be used to indicate a diagnosis on a reimbursement claim, however, 100.9 should only be used for claims with a date of service on or before September 30, 2015. For claims with a date of service on or after October 1, 2015, use an equivalent ICD-10-CM code (or codes).
Convert to ICD-10-CM: 100.9 converts directly to:
  • 2015/16 ICD-10-CM A27.9 Leptospirosis, unspecified
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-9-CM Volume 2 Index entries containing back-references to 100.9:
  • Infection, infected, infective (opportunistic) 136.9
    • leptospirochetal NEC (see also Leptospirosis) 100.9
  • Leptospirosis 100.9
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 100.9 is one of thousands of ICD-9-CM codes used in healthcare. Although ICD-9-CM and CPT codes are largely numeric, they differ in that CPT codes describe medical procedures and services. Can't find a code? Start at the root of ICD-9-CM, check the 2015 ICD-9-CM Index or use the search engine at the top of this page to lookup any code.