N28.0 Ischemia and infarction of kidney

The ICD-10-CM code for Ischemia and infarction of kidney is N28.0 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

14: Diseases of the genitourinary system (N00-N99)

Section

N25-N29: Other disorders of kidney and ureter (N25-N29)

Category N28

12 codes (10 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to N28.0:

• Infarct, infarction › kidney
• Ischemia, ischemic › kidney
• Ischemia, ischemic › renal
• Embolism (multiple) (paradoxical) › renal (artery)
• Embolism (multiple) (paradoxical) › kidney (artery)
• Infarct, infarction › renal (embolic) (thrombotic)
• Crisis › renal
• Infarct, infarction › brewer's (kidney)

Inclusion Terms

• Renal artery embolism
• Renal artery obstruction
• Renal artery occlusion
• Renal artery thrombosis
• Renal infarct

U.S. Hospital Utilization

• An estimated 23,125 U.S. inpatient stays in 2023 included N28.0 among the documented diagnoses.
• 3,220 stays listed it as the principal diagnosis.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

Official Coding Guidelines

CKD staging and code assignment (N18.-)

The ICD-10-CM classifies CKD based on severity. The severity of CKD is designated by stages 1-5. Stage 2, code N18.2, equates to mild CKD; stage 3, codes N18.30-N18.32, equate to moderate CKD; and stage 4, code N18.4, equates to severe CKD. Code N18.6, End stage renal disease (ESRD), is assigned when the provider has documented end- stage renal disease (ESRD).

CKD stage plus ESRD: assign N18.6 only

If both a stage of CKD and ESRD are documented, assign code N18.6 only.

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool
• AHRQ — HCUP National Inpatient Sample, Frequencies by Diagnosis Code (2016–2023)

Cite This Page

Reference N28.0 with the canonical source and edition:

N28.0 — Ischemia and infarction of kidney. ICD-10 Coding Pro (ICD-10-CM FY2026). https://icd10codingpro.com/codes/N28.0

Canonical URL: https://icd10codingpro.com/codes/N28.0