N10

ICD-10Billable

Acute pyelonephritis

Official ICD-10-CM descriptor (FY2026)

Acute pyelonephritis

N10 is valid for submission on a claim: CMS flags it as a billable, specific code.

Inclusion terms

Acute infectious interstitial nephritis
Acute pyelitis
Acute tubulo-interstitial nephritis
Hemoglobin nephrosis
Myoglobin nephrosis

Use additional code

Report an additional code to identify the associated condition.

code (B95-B97), to identify infectious agent.

Where this code sits

Chapter: 14. Diseases of the genitourinary system (N00-N99)
Block: Renal tubulo-interstitial diseases (N10-N16)

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Source

ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.