Interstitial nephritis:

Rate as renal dysfunction.

Requiring regular dialysis, or precluding more than sedentary activity from one of the following: persistent edema and albuminuria; or, BUN more than 80mg%; or, creatinine more than 8mg%; or, markedly decreased function of kidney or other organ systems, especially cardiovascular

Persistent edema and albuminuria with BUN 40 to 80mg%; or, creatinine 4 to 8mg%; or, generalized poor health characterized by lethargy, weakness, anorexia, weight loss, or limitation of exertion

Constant albuminuria with some edema; or, definite decrease in kidney function; or, hypertension at least 40 percent disabling under diagnostic code 7101

Albumin constant or recurring with hyaline and granular casts or red blood cells; or, transient or slight edema or hypertension at least 10 percent disabling under diagnostic code 7101

Albumin and casts with history of acute nephritis; or, hypertension non-compensable under diagnostic code 7101