Home > 2011 ICD-9-CM Diagnosis Codes > Infectious And Parasitic Diseases 001-139 > Arthropod-Borne Viral Diseases 060-066 > Other arthropod-borne viral diseases 066-
Specific code 2011 ICD-9-CM Diagnosis Code 066.40
West nile fever, unspecified
  • Short description: West Nile Fever NOS.
  • ICD-9-CM 066.40 is a billable medical code that can be used to indicate a diagnosis on a reimbursement claim, however, 066.40 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).
  • You are viewing the 2011 version of ICD-9-CM 066.40.
  • More recent version(s) of ICD-9-CM 066.40: 2012 2013 2014 2015.
Convert to ICD-10-CM: 066.40 converts directly to:
  • 2015/16 ICD-10-CM A92.30 West Nile virus infection, unspecified
Approximate Synonyms
  • Disease due to West Nile virus
  • West nile virus infection
ICD-9-CM Volume 2 Index entries containing back-references to 066.40:
 066.4 ICD9Data.com 066.41 
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 066.40 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 2011 ICD-9-CM Index or use the search engine at the top of this page to lookup any code.
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