AHA Coding Clinic® for ICD-9 - 1997 Fourth Quarter

Calculus with Pyelonephritis

The excludes note under code 590.80, Pyelonephritis, unspecified, has been deleted. The change clarifies that code 592.9, Urinary calculus, unspecified, is to be used with code 590.80 to more completely classify ureteral calculus with pyelonephritis. Either code may be sequenced first. 590 Infections of kidney 590.8 Other pyelonephritis or pyonephrosis, not specified as acute or chronic 590.80 Pyelonephritis, unspecifiedDelete Excludes: calculous pyelonephritis (592.9) 592 Calculus of kidney and ureter 592.9 Urinary calculus, unspecifiedDelete Calculous pyelonephritis ...

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