Home > 2011 ICD-9-CM Diagnosis Codes > Diseases Of The Circulatory System 390-459 > Diseases Of Arteries, Arterioles, And Capillaries 440-449 > Polyarteritis nodosa and allied conditions 446-
Specific code 2011 ICD-9-CM Diagnosis Code 446.20
Hypersensitivity angiitis unspecified
  • Short description: Hypersensit angiitis NOS.
  • ICD-9-CM 446.20 is a billable medical code that can be used to indicate a diagnosis on a reimbursement claim, however, 446.20 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 446.20.
  • More recent version(s) of ICD-9-CM 446.20: 2012 2013 2014 2015.
Convert to ICD-10-CM: 446.20 converts approximately to:
  • 2015/16 ICD-10-CM M31.0 Hypersensitivity angiitis
ICD-9-CM Volume 2 Index entries containing back-references to 446.20:
  • Angiitis 447.6
    • hypersensitivity 446.20
  • Arteritis 447.6
    • allergic (see also Angiitis, hypersensitivity) 446.20
  • Collagen disease NEC 710.9
    • vascular (allergic) (see also Angiitis, hypersensitivity) 446.20
  • Disease, diseased - see also Syndrome
    • collagen NEC 710.9
      • nonvascular 710.9
      • specified NEC 710.8
      • vascular (allergic) (see also Angiitis, hypersensitivity) 446.20
  • Hypersensitive, hypersensitiveness, hypersensitivity - see also Allergy
    • angiitis 446.20
 446.2 ICD9Data.com 446.21 
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 446.20 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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