2026 ICD-10-CM Diagnosis Code N14.4Toxic nephropathy, not elsewhere classified

ICD-10-CM Codes›N00–N99›N10-N16›N14

ICD-10-CM N14.4
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

N14.4 is a billable ICD-10-CM diagnosis code for toxic nephropathy, not elsewhere classified. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 698 through 700. Coders also document this condition as acute toxic nephropathy. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Drug induced or toxic related condition and Nephritis; nephrosis; renal sclerosis.

Code Identity

ICD-10-CM Code
N14.4
Billable Status
Yes — Valid for Submission
Code Describes
Toxic nephropathy, not elsewhere classified
Short Description
Toxic nephropathy, not elsewhere classified
Same as the full description in the CMS dataset.
Parent Code
N14
Drug- and heavy-metal-induced tubulo-interstitial and tubular conditions

Code Classification

ChapterN00–N99Diseases of the genitourinary system
SectionN10-N16Renal tubulo-interstitial diseases
CategoryN14Drug- and heavy-metal-induced tubulo-interstitial and tubular conditions
This CodeN14.4Toxic nephropathy, not elsewhere classified

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acute toxic nephropathy
  • Aristolochic acid nephropathy
  • Chronic toxic interstitial nephritis
  • Nephrotoxic acute renal failure
  • Nephrotoxic serum nephritis
  • Oxalate nephropathy
  • Pigment nephropathy
  • Secondary oxalosis
  • Toxic nephropathy

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Nephropathy
      • toxic NEC

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR INJ030
Drug induced or toxic related condition
Default principal diagnosis: inpatient No · outpatient No
CCSR GEN001
Nephritis; nephrosis; renal sclerosis
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Kidney Diseases

You have two kidneys, each about the size of your fist. They are near the middle of your back, just below the rib cage. Inside each kidney there are about a million tiny structures called nephrons. They filter your blood. They remove wastes and extra water, which become urine. The urine flows through tubes called ureters.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert N14.4 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
583.89 Nephritis NEC
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About N14.4Overview

Is N14.4 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report toxic nephropathy, not elsewhere classified on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does N14.4 group to?

When toxic nephropathy, not elsewhere classified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 698, 699, 700, with relative weights from 0.6899 to 1.6544 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of N14.4?

Under the General Equivalence Mappings, toxic nephropathy, not elsewhere classified converts to ICD-9-CM 583.89 (nephritis NEC). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.