ICD-9-CM 446.21 is a billable medical code that can be used to indicate a diagnosis on a reimbursement claim, however, 446.21 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).
An autoimmune disease of the kidney and the lung. It is characterized by the presence of circulating autoantibodies targeting the epitopes in the non-collagenous domains of collagen type iv in the basement membranes of kidney glomeruli (kidney glomerulus) and lung alveoli (pulmonary alveoli), and the subsequent destruction of these basement membranes. Clinical features include pulmonary alveolar hemorrhage and glomerulonephritis
An autoimmune disorder characterized by pulmonary hemorrhage and glomerulonephritis. It is a hypersensitivity reaction resulting in the formation of antibodies against the pulmonary alveoli and the basement membrane of the glomeruli
An autoimmune disorder characterized by the production of autoantibodies against type iv collagen of the glomerular basement membrane of the kidney. In the majority of patients the immune reaction also extends to the alveolar capillary membrane of the lungs. The latter cases are referred to as goodpasture syndrome
Combination of pulmonary hemorrhage and glomerulonephritis; known also as the lung purpura glomerulonephritis complex; considered by some to be a form of hypersensitivity reaction
Applies To
Antiglomerular basement membrane antibody-mediated nephritis with pulmonary hemorrhage
Use Additional
Use additional code to identify renal disease (583.81)
2015 ICD-9-CM Diagnosis Code 446.21 
)
hypersensitivity 
Goodpasture's syndrome 
