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ICD-10 Coding for Hypertensive Kidney Disease(I12.9, I12.0)

Complete ICD-10-CM coding and documentation guide for Hypertensive Kidney Disease. Includes clinical validation requirements, documentation requirements, and coding pitfalls.

Also known as:

Hypertensive NephropathyHypertensive Renal Disease

Related ICD-10 Code Ranges

Complete code families applicable to Hypertensive Kidney Disease

I10-I15Primary Range

Hypertensive diseases

This range includes codes for hypertensive conditions, including those affecting the kidneys.

Chronic kidney disease (CKD)

This range covers the stages of chronic kidney disease, which are essential for coding hypertensive kidney disease.

Code Comparison: When to Use Each Code

Compare key differences between these codes to ensure accurate selection

CodeDescriptionWhen to UseKey Documentation
I12.9Hypertensive chronic kidney disease with stage 1 through stage 4 chronic kidney disease, or unspecified chronic kidney diseaseUse when hypertension is documented with CKD stages 1-4.
  • eGFR <60 for ≥3 months
  • Blood pressure >130/80
I12.0Hypertensive chronic kidney disease with stage 5 chronic kidney disease or end stage renal diseaseUse when hypertension is documented with CKD stage 5 or ESRD.
  • eGFR <15
  • Dialysis orders

Clinical Decision Support

Always review the patient's clinical documentation thoroughly. When in doubt, choose the more specific code and ensure documentation supports it.

Key Information: ICD-10 code for hypertensive kidney disease

Essential facts and insights about Hypertensive Kidney Disease

The ICD-10 code for hypertensive kidney disease with CKD stages 1-4 is I12.9, and for stage 5 or ESRD, it is I12.0.

Primary ICD-10-CM Codes for hypertensive kidney disease

Hypertensive chronic kidney disease with stage 1 through stage 4 chronic kidney disease, or unspecified chronic kidney disease
Billable Code

Decision Criteria

clinical Criteria

  • Documented hypertension with CKD stage 1-4

Applicable To

  • Hypertensive CKD stage 1-4

Excludes

  • Hypertensive heart AND chronic kidney disease (I13.-)

Clinical Validation Requirements

  • eGFR <60 for ≥3 months
  • Blood pressure >130/80

Code-Specific Risks

  • Incorrectly coding I10 instead of I12.9 when CKD is present

Coding Notes

  • Ensure CKD stage is documented and linked to hypertension.

Ancillary Codes

Additional codes that should be used in conjunction with the main diagnosis codes when applicable.

Chronic kidney disease stages 1-4

N18.1-N18.4
Use to specify the stage of CKD.

Chronic kidney disease stage 5 or ESRD

N18.5-N18.6
Use to specify the stage of CKD or ESRD.

Differential Codes

Alternative codes to consider when ruling out similar conditions to the primary diagnosis.

Essential (primary) hypertension

I10
Use I10 only when CKD is not present.

Hypertensive heart and chronic kidney disease with heart failure

I13.0
Use when heart failure is also present.

Documentation & Coding Risks

Avoid these common documentation and coding issues when documenting Hypertensive Kidney Disease to ensure proper reimbursement, maintain compliance, and reduce audit risk. These guidelines are particularly important when using ICD-10 code I12.9.

Impact

Clinical: Inaccurate treatment planning., Regulatory: Non-compliance with coding standards., Financial: Potential loss of reimbursement.

Mitigation Strategy

Always include eGFR values in documentation.

Impact

Reimbursement: May result in lower reimbursement due to incorrect DRG assignment., Compliance: Non-compliance with ICD-10 coding guidelines., Data Quality: Inaccurate clinical data affecting patient care and research.

Mitigation Strategy

Always link hypertension with CKD using I12.x codes.

Impact

Hypertension must be sequenced before CKD stage.

Mitigation Strategy

Educate providers on correct sequencing rules.

Documentation errors, coding pitfalls, and audit risks are interconnected aspects of medical coding and billing. Addressing all three areas helps ensure accurate coding, optimal reimbursement, and regulatory compliance.

Frequently Asked Questions

Common questions about ICD-10 coding for Hypertensive Kidney Disease, with expert answers to help guide accurate code selection and documentation.

Documentation Templates for Hypertensive Kidney Disease

Use these documentation templates to ensure complete and accurate documentation for Hypertensive Kidney Disease. These templates include all required elements for proper coding and billing.

Hypertensive CKD with stage 3

Specialty: Nephrology

Required Elements

  • Hypertension diagnosis
  • CKD stage
  • eGFR values
  • Blood pressure readings

Example Documentation

Patient with hypertension and CKD stage 3 (eGFR 45) managed with ACE inhibitors.

Examples: Poor vs. Good Documentation

Poor Documentation Example
HTN and CKD
Good Documentation Example
Hypertensive CKD stage 3 (eGFR 45) with BP 140/90.
Explanation
The good example specifies the relationship and stage, supporting accurate coding.

Need help with ICD-10 coding for Hypertensive Kidney Disease? Ask your questions below.

Ask about any ICD-10 CM code, or paste a medical note

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