2006 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.* > 2006 ICD-9-CM Diagnosis 446.5 Giant cell arteritis View the most recent version of ICD-9-CM 446.5 A systemic autoimmune vasculitis occurring primarily in people over the age of 50. Pathologic features include a necrotizing panarteritis including granulomas and giant cells. There is a predilection for involvement of central nervous system blood vessels and the most frequent neurologic complication is an OPTIC NEUROPATHY, ISCHEMIC. Large blood vessels may become involved, including the aorta. Clinical manifestations may include myalgias, weight loss, headache, visual loss, necrosis of the skin or tongue, and chest discomfort. Superficial scalp arteries may become tender and enlarged. A related condition, juvenile temporal arteritis, tends to occur in the first or second decade of life. 446.5 is a specific code that can be used to specify a diagnosis 446.5 contains 11 index entries View the ICD-9-CM Volume 1 446.* hierarchy Alternate Terminology Cranial arteritis Horton's disease Temporal arteritis  Index entries containing 446.5: Anarthritic rheumatoid disease 446.5 Arteritis 447.6 cranial (left) (right) 446.5 giant cell 446.5 temporal 446.5 Bagratuni's syndrome (temporal arteritis) 446.5 Disease, diseased - see also Syndrome anarthritic rheumatoid 446.5 Horton's (temporal arteritis) 446.5 Horton's disease (temporal arteritis) 446.5 Polymyalgia 725 arteritica 446.5 Rhizomelique, pseudopolyarthritic 446.5 Syndrome - see also Disease Bagratuni's (temporal arteritis) 446.5