ICD-10 Logo
ICDxICD-10 Medical Coding
ICD-10 Logo
ICDxICD-10 Medical Coding
ICD 10 CodesDiagnoses
ICD 10 CodesDiagnoses
ICD-10 Logo
ICDxICD-10 Medical Coding

Comprehensive ICD-10-CM code reference with AI-powered search capabilities.

© 2025 ICD Code Compass. All rights reserved.

Browse

  • All Chapters
  • All Categories
  • Diagnoses

Tools

  • AI Code Search
ICD-10-CM codes are maintained by the CDC and CMS. This tool is for reference purposes only.
v1.0.0
ICD-10 Guide
ICD-10 CodesN26.1

N26.1

Billable

Atrophy of kidney (terminal)

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/18/2025

Code Description

ICD-10 N26.1 is a billable code used to indicate a diagnosis of atrophy of kidney (terminal).

Key Diagnostic Point:

Atrophy of the kidney, classified as terminal, refers to a significant reduction in kidney size and function, often resulting from chronic kidney disease or ischemic nephropathy. This condition can arise due to prolonged ischemia, leading to irreversible damage and loss of renal parenchyma. Patients may present with symptoms of renal insufficiency, including fatigue, fluid retention, and electrolyte imbalances. The atrophy can be unilateral or bilateral, with bilateral atrophy often indicating a more severe underlying pathology. Diagnostic imaging, such as ultrasound or CT scans, may reveal reduced kidney size, while laboratory tests can show elevated creatinine and urea levels, indicating impaired renal function. Management typically focuses on addressing the underlying cause, managing complications, and preparing for potential renal replacement therapy, such as dialysis or transplantation. Understanding the nuances of this condition is crucial for accurate coding and appropriate patient management.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiating between acute and chronic kidney conditions
  • Understanding the implications of ischemic nephropathy
  • Identifying associated comorbidities that may affect coding
  • Navigating documentation requirements for chronic kidney disease

Audit Risk Factors

  • Inadequate documentation of kidney function tests
  • Failure to document the underlying cause of atrophy
  • Misclassification of acute versus chronic conditions
  • Lack of imaging studies to support diagnosis

Specialty Focus

Medical Specialties

Nephrology

Documentation Requirements

Detailed history of kidney function, lab results, imaging studies, and treatment plans.

Common Clinical Scenarios

Patients with chronic kidney disease progressing to end-stage renal disease, requiring dialysis or transplantation.

Billing Considerations

Ensure all comorbidities are documented to support the complexity of care.

Urology

Documentation Requirements

Surgical history, imaging results, and any interventions performed.

Common Clinical Scenarios

Patients with obstructive uropathy leading to kidney atrophy.

Billing Considerations

Document any surgical interventions that may impact kidney function.

Coding Guidelines

Inclusion Criteria

Use N26.1 When
  • Follow the official ICD
  • CM coding guidelines, ensuring accurate documentation of the patient's history, clinical findings, and any imaging or lab results that support the diagnosis

Exclusion Criteria

Do NOT use N26.1 When
  • Exclude conditions that do not meet the criteria for N26

Related ICD-10 Codes

Related CPT Codes

90935CPT Code

Hemodialysis

Clinical Scenario

Used for patients with end-stage renal disease due to kidney atrophy.

Documentation Requirements

Document the need for dialysis and the patient's renal function status.

Specialty Considerations

Nephrology specialists should ensure comprehensive documentation of the patient's history and treatment plan.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of kidney disorders, improving the accuracy of diagnoses and treatment plans. N26.1 provides a clear classification for terminal kidney atrophy, facilitating better patient management and resource allocation.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of kidney disorders, improving the accuracy of diagnoses and treatment plans. N26.1 provides a clear classification for terminal kidney atrophy, facilitating better patient management and resource allocation.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of kidney disorders, improving the accuracy of diagnoses and treatment plans. N26.1 provides a clear classification for terminal kidney atrophy, facilitating better patient management and resource allocation.

Resources

Clinical References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting

Coding & Billing References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting

Frequently Asked Questions

What is the primary cause of kidney atrophy?

The primary cause of kidney atrophy is often chronic ischemia, which can result from conditions such as renal artery stenosis, uncontrolled hypertension, or diabetes.