ICD-9-CM Vol. 1 Diagnostic Codes →
7. DISEASES OF THE CIRCULATORY SYSTEM (390-459) →
section notes
DISEASES OF ARTERIES, ARTERIOLES, AND CAPILLARIES (440-449) →
section notes
446 Polyarteritis nodosa and allied conditions →
section notes
446.2 Hypersensitivity angiitis →
section notes
446.20   Hypersensit angiitis NOS
446.21   Goodpasture's syndrome
446.29   Hypersensit angiitis NEC
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