What is the ICD-10-CM code for pyelonephritis?

The primary ICD-10-CM code for pyelonephritis is N10 (Acute pyelonephritis). There are 11 billable pyelonephritis codes in FY2027, covering different types and underlying causes.

How many ICD-10-CM codes are there for pyelonephritis?

There are 12 ICD-10-CM codes for pyelonephritis in the FY2027 tabular list, of which 11 are billable. These codes fall under Chapter 14 of the ICD-10-CM classification.

Which chapter covers pyelonephritis in ICD-10-CM?

Pyelonephritis codes are classified in Chapter 14 of the ICD-10-CM tabular list: N00–N99 (Diseases of the Genitourinary System).

Pyelonephritis ICD-10-CM codes

ICD-10-CM codes for acute and chronic pyelonephritis, pyonephrosis, and pyelonephritis in pregnancy.

12 codes, 11 billable. FY2027, valid from October 1, 2026. In chapter 14: Diseases of the Genitourinary System.

How to code Pyelonephritis

N10 is acute pyelonephritis (acute kidney infection). Chronic pyelonephritis is coded from N11, with N11.0 for nonobstructive reflux-associated and N11.1 for obstructive. N12 is used when the record does not say acute or chronic. Add an organism code when known, such as B96.20 for E. coli.

Pyelonephritis with hydronephrosis (pyonephrosis) is N13.6, and calculous pyelonephritis is N20.9. In pregnancy, kidney infection is coded from O23.0-. A lower urinary tract infection without kidney involvement is N39.0.

All Pyelonephritis codes

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