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v1.0.0
ICD-10 Guide
ICD-10 CodesI51.8

I51.8

Non-billable

Other ill-defined heart diseases

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

Code Description

ICD-10 I51.8 is a used to indicate a diagnosis of other ill-defined heart diseases.

Key Diagnostic Point:

Other ill-defined heart diseases encompass a range of cardiac conditions that do not fit neatly into specific categories. These may include atypical presentations of heart disease or conditions that are not well understood. Symptoms can vary widely, and diagnosis often requires comprehensive evaluation. Treatment is tailored to the individual and may involve a combination of medications and lifestyle changes.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • patient history
  • symptom presentation

Audit Risk Factors

    Specialty Focus

    Related ICD-10 Codes

    Related CPT Codes

    93306CPT Code

    Clinical Scenario

    Documentation Requirements

    ICD-10 Impact

    Diagnostic & Documentation Impact

    Enhanced Specificity

    ICD-10 Improvements

    Can lead to significant morbidity if not properly managed.

    ICD-9 vs ICD-10

    Can lead to significant morbidity if not properly managed.

    Reimbursement & Billing Impact

    Can lead to significant morbidity if not properly managed.

    Resources

    Clinical References

    • •
      National Heart, Lung, and Blood Institute Resources

    Coding & Billing References

    • •
      National Heart, Lung, and Blood Institute Resources

    Frequently Asked Questions

    How are ill-defined heart diseases diagnosed?

    Diagnosis often involves a combination of imaging studies, lab tests, and clinical evaluation.