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ICD-10 Guide
ICD-10 CodesI12

I12

Non-billable

Hypertensive chronic kidney disease

BILLABLE STATUSNo
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/06/2025

Code Description

ICD-10 I12 is a used to indicate a diagnosis of hypertensive chronic kidney disease.

Key Diagnostic Point:

Hypertensive chronic kidney disease (CKD) is a condition characterized by the presence of chronic kidney disease in patients with hypertension. The kidneys, which play a crucial role in regulating blood pressure and fluid balance, can become damaged over time due to prolonged high blood pressure. This damage can lead to a decline in kidney function, often progressing through stages of CKD, from mild impairment to end-stage renal disease (ESRD). Clinically, patients may present with symptoms such as fatigue, swelling, and changes in urination patterns. The anatomy involved includes the renal arteries, nephrons, and glomeruli, which are essential for filtering blood and excreting waste. Disease progression is often insidious, with many patients remaining asymptomatic until significant kidney damage has occurred. Diagnostic considerations include blood pressure monitoring, serum creatinine levels, and urine tests to assess kidney function and proteinuria. Early detection and management of hypertension are critical to slowing the progression of CKD and preventing cardiovascular complications.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Diagnostic complexity: Requires understanding of both hypertension and kidney function tests.
  • Treatment complexity: Involves managing blood pressure and potential renal replacement therapies.
  • Documentation requirements: Must document both hypertension and CKD stages accurately.
  • Coding specificity: Requires precise coding to reflect the stage of CKD and associated hypertension.

Audit Risk Factors

  • Common coding errors: Misclassification of CKD stages or failure to document hypertension.
  • Documentation gaps: Incomplete medical records regarding blood pressure readings or kidney function tests.
  • Billing challenges: Potential denials due to lack of clear linkage between hypertension and CKD.

Specialty Focus

Medical Specialties

Nephrology

Documentation Requirements

Standard ICD-10-CM documentation requirements apply

Common Clinical Scenarios

Various clinical presentations within this specialty area

Billing Considerations

Follow specialty-specific billing guidelines

Cardiology

Documentation Requirements

Standard ICD-10-CM documentation requirements apply

Common Clinical Scenarios

Various clinical presentations within this specialty area

Billing Considerations

Follow specialty-specific billing guidelines

Related CPT Codes

CPT Code

Clinical Scenario

Documentation Requirements

CPT Code

Clinical Scenario

Documentation Requirements

CPT Code

Clinical Scenario

Documentation Requirements

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

Hypertensive chronic kidney disease significantly impacts clinical outcomes, as it is a leading cause of morbidity and mortality in patients with cardiovascular diseases. The interplay between hypertension and CKD exacerbates cardiovascular risks, leading to increased healthcare utilization and costs. Effective management of I12 can improve patient quality of life and reduce the burden on healthcare systems, highlighting the importance of early diagnosis and intervention in at-risk populations.

ICD-9 vs ICD-10

Hypertensive chronic kidney disease significantly impacts clinical outcomes, as it is a leading cause of morbidity and mortality in patients with cardiovascular diseases. The interplay between hypertension and CKD exacerbates cardiovascular risks, leading to increased healthcare utilization and costs. Effective management of I12 can improve patient quality of life and reduce the burden on healthcare systems, highlighting the importance of early diagnosis and intervention in at-risk populations.

Reimbursement & Billing Impact

Hypertensive chronic kidney disease significantly impacts clinical outcomes, as it is a leading cause of morbidity and mortality in patients with cardiovascular diseases. The interplay between hypertension and CKD exacerbates cardiovascular risks, leading to increased healthcare utilization and costs. Effective management of I12 can improve patient quality of life and reduce the burden on healthcare systems, highlighting the importance of early diagnosis and intervention in at-risk populations.

Resources

Clinical References

  • •
    ICD-10 Official Guidelines for I00-I99
  • •
    Clinical Documentation Requirements

Coding & Billing References

  • •
    ICD-10 Official Guidelines for I00-I99
  • •
    Clinical Documentation Requirements

Frequently Asked Questions

What specific conditions are covered by I12?

I12 covers hypertensive chronic kidney disease, which includes patients with hypertension who also have chronic kidney disease, classified by stages (I-IV) based on the level of kidney function impairment.

When should I12 be used instead of related codes?

I12 should be used when a patient has both hypertension and chronic kidney disease. If only hypertension is present without CKD, code I10 should be used. If CKD is present without hypertension, use N18 codes.

What documentation supports I12?

Documentation should include a confirmed diagnosis of hypertension, evidence of chronic kidney disease (such as lab results indicating decreased GFR), and any treatment plans addressing both conditions.