2007 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Circulatory System 390-459 > Diseases Of Arteries, Arterioles, And Capillaries 440-448 > Polyarteritis Nodosa And Allied Conditions 446.* >
 2007 ICD-9-CM Diagnosis 446.20
Hypersensitivity angiitis unspecified On October 1, 2008 the 2009 ICD-9-CM codes came into effect. Therefore, this code may be out of date.
The 2009 version of ICD-9-CM 446.20 can be accessed here. - Heterogeneous group of disorders characterized by a vasculitic syndrome presumed to be associated with a hypersensitivity reaction following exposure to an antigen such as an infectious agent, a drug, or other foreign or endogenous substance (Wilson et al, Harrison's Principles of Internal Medicine, 12th ed, p1459).
- 446.20 is a specific code that can be used to specify a diagnosis
- 446.20 contains 5 index entries
- View the ICD-9-CM Volume 1 446.* hierarchy
Index entries containing 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
- vascular (allergic) (see also Angiitis, hypersensitivity) 446.20
Hypersensitive, hypersensitiveness, hypersensitivity - see also Allergy- angiitis 446.20
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