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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Note:  The following article synopsis was NOT provided by the AHA. It was created by Find-A-Code/innoviHealth.

Article Overview

This article explains a coding clarification involving pyelonephritis and urinary calculus, with reference to an exclusion note change and a later correction notice from Coding Clinic. It is relevant to coders and billing professionals who work with urinary system diagnoses and need to track historical ICD-9-CM guidance and updates.

Why This Topic Matters

Articles like this help users understand when official coding guidance changes how related diagnosis codes are reported together. That matters for accurate claim reporting, record abstraction, and consistent use of historical ICD-9-CM terminology.

Article Sections

  1. Code note change and clarification

    Summarizes a deletion to an exclusion note and the related clarification about how the diagnoses are represented together. The section also shows the diagnosis categories involved.

  2. How should ureteral calculus with pyelonephritis be coded?

    Presents the article’s coding question and the accompanying correction notice. This section frames the update in the context of a Coding Clinic reference.

What You Will Learn

  • How an exclusion note change affected related diagnosis coding guidance
  • Which general diagnosis categories are discussed in the clarification
  • How a correction notice can alter the interpretation of prior coding advice
  • What historical coding reference is cited in connection with the update

Who Should Read This

  • Medical coders
  • Coding auditors
  • Billing staff
  • Clinical documentation teams
  • Health information management professionals

Codes Discussed

  • ICD-9-CM: 590.80
  • ICD-9-CM: 592.9
  • ICD-9-CM: 590.8
  • ICD-9-CM: 590
  • ICD-9-CM: 592
  • ICD-9-CM: 592.1

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