Atrophy of kidney (terminal)

This code describes a kidney that has undergone significant shrinkage and functional decline, often representing the end-stage of a chronic kidney disease process. It indicates irreversible damage where the kidney is no longer able to perform its normal functions.

Use this code when documentation explicitly states "atrophy of kidney," "atrophic kidney," or "terminal kidney." This typically applies to kidneys that are small, scarred, and non-functional due to long-standing conditions such as chronic glomerulonephritis, diabetic nephropathy, or obstructive uropathy.

• Always code the underlying cause of the kidney atrophy first, if known and still active.
• Distinguish from acute kidney injury or chronic kidney disease stages without explicit documentation of atrophy.
• Do not use for congenital hypoplasia unless atrophy is specifically documented as an acquired condition.