Specific code 2015 ICD-9-CM Diagnosis Code 121.9
Trematode infection, unspecified
  • 2015
  • Billable Thru Sept 30/2015
  • Non-Billable On/After Oct 1/2015

  • ICD-9-CM 121.9 is a billable medical code that can be used to indicate a diagnosis on a reimbursement claim, however, 121.9 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: 121.9 converts directly to:
  • 2015/16 ICD-10-CM B66.9 Fluke infection, unspecified
Approximate Synonyms
  • Trematode infection
Clinical Information
  • Infections caused by infestation with worms of the class trematoda
Applies To
  • Distomiasis NOS
  • Fluke disease NOS
ICD-9-CM Volume 2 Index entries containing back-references to 121.9:
  • Distomiasis 121.9
    • bile passages 121.3
      • due to Clonorchis sinensis 121.1
    • hepatic (liver) 121.3
      • due to Clonorchis sinensis (clonorchiasis) 121.1
  • Flukes NEC (see also Infestation, fluke) 121.9
    • blood NEC (see also Infestation, Schistosoma) 120.9
  • Infection, infected, infective (opportunistic) 136.9
    • trematode NEC 121.9
  • Infestation 134.9
    • trematode(s) NEC 121.9
  • Trematode infestation NEC 121.9
  • Trematodiasis NEC 121.9
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 121.9 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.