Home > 2011 ICD-9-CM Diagnosis Codes > Endocrine, Nutritional And Metabolic Diseases, And Immunity Disorders 240-279 > Nutritional Deficiencies 260-269 > Thiamine and niacin deficiency states 265-
Specific code 2011 ICD-9-CM Diagnosis Code 265.1
Other and unspecified manifestations of thiamine deficiency
  • Short description: Thiamine defic NEC/NOS.
  • ICD-9-CM 265.1 is a billable medical code that can be used to indicate a diagnosis on a reimbursement claim, however, 265.1 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 265.1.
  • More recent version(s) of ICD-9-CM 265.1: 2012 2013 2014 2015.
Convert to ICD-10-CM: 265.1 converts approximately to:
  • 2015/16 ICD-10-CM E51.8 Other manifestations of thiamine deficiency
    Or:
  • 2015/16 ICD-10-CM E51.9 Thiamine deficiency, unspecified
Approximate Synonyms
  • Chastek paralysis
  • Inadequate dietary intake of thiamine
  • Thiamin deficiency
  • Thiamine and niacin deficiency states
  • Thiamine deficiency
  • Wernicke disease
  • Wernickes disease
  • Wernicke's disease
Applies To
  • Other vitamin B1 deficiency states
ICD-9-CM Volume 2 Index entries containing back-references to 265.1:
  • Aneurin deficiency 265.1
  • Avitaminosis (multiple NEC) (see also Deficiency, vitamin) 269.2
    • B1 265.1
  • Deficiency, deficient
    • aneurin 265.1
    • thiamine, thiaminic (chloride) 265.1
  • Disease, diseased - see also Syndrome
    • Gayet's (superior hemorrhagic polioencephalitis) 265.1
    • Wernicke's (superior hemorrhagic polioencephalitis) 265.1
  • Encephalopathy (acute) 348.30
    • Wernicke's (superior hemorrhagic polioencephalitis) 265.1
  • Gayet's disease (superior hemorrhagic polioencephalitis) 265.1
  • Gayet-Wernicke's syndrome (superior hemorrhagic polioencephalitis) 265.1
  • Hemorrhage, hemorrhagic (nontraumatic) 459.0
    • polioencephalitis, superior 265.1
  • Polioencephalitis (acute) (bulbar) (see also Poliomyelitis, bulbar) 045.0
    • superior hemorrhagic (acute) (Wernicke's) 265.1
    • Wernicke's (superior hemorrhagic) 265.1
  • Polioencephalopathy, superior hemorrhagic 265.1
  • Pseudoencephalitis
    • superior (acute) hemorrhagic 265.1
  • Syndrome - see also Disease
    • Gayet-Wernicke's (superior hemorrhagic polioencephalitis) 265.1
    • Wernicke's (nonalcoholic) (superior hemorrhagic polioencephalitis) 265.1
  • Thiaminic deficiency 265.1
  • Wernicke's encephalopathy, disease, or syndrome (superior hemorrhagic polioencephalitis) 265.1
 265.0 ICD9Data.com 265.2 
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 265.1 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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