
Infections of kidney
- invasion and growth of microorganisms in the kidney; may be clinically inapparent or result in local cellular injury.

Chronic pyelonephritis

Chronic pyelonephritis without lesion of renal medullary necrosis

Chronic pyelonephritis with lesion of renal medullary necrosis

Acute pyelonephritis

Acute pyelonephritis without lesion of renal medullary necrosis

Acute pyelonephritis with lesion of renal medullary necrosis

Renal and perinephric abscess

Pyeloureteritis cystica

Other pyelonephritis or pyonephrosis not specified as acute or chronic

Pyelonephritis unspecified
- inflammation of the kidney and its pelvis due to infection.

Pyelitis or pyelonephritis in diseases classified elsewhere

Infection of kidney unspecified
- invasion and growth of microorganisms in the kidney; may be clinically inapparent or result in local cellular injury.