AHA Coding Clinic® for ICD-10-CM and ICD-10-PCS - 2019 Issue 3; Ask the Editor

Acute Pyelonephritis with Renal Calculus

A patient presents due to abdominal pain. At discharge, the provider documents “Acute pyelonephritis and nephrolithiasis.” When referencing pyelonephritis in the Alphabetic Index there are subentries for “acute” and “with calculus” at the same indentation level. Should only the combination code describing calculus with pyelonephritis be assigned, or are separate codes assigned? What is the appropriate code assignment for acute pyelonephritis with calculus? ...

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