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ICD-10 Guide
ICD-10 CodesR79.8

R79.8

Other specified abnormal findings of blood chemistry

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/11/2025

Code Description

ICD-10 R79.8 is a billable code used to indicate a diagnosis of other specified abnormal findings of blood chemistry.

Key Diagnostic Point:

R79.8 is used to classify abnormal findings in blood chemistry that do not fall under more specific categories. These findings may include unusual levels of various substances in the blood, such as electrolytes, enzymes, or metabolites, which can indicate underlying health issues. For instance, abnormal levels of creatinine may suggest renal impairment, while elevated liver enzymes could indicate hepatic dysfunction. The clinical context is crucial, as these findings often require further investigation to determine their significance. The abnormal results may arise from a variety of causes, including metabolic disorders, endocrine dysfunction, or even transient changes due to medications or dietary factors. Accurate coding necessitates a thorough understanding of the patient's clinical picture and the specific laboratory findings that prompted the testing.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variety of potential underlying conditions
  • Need for correlation with clinical findings
  • Variability in laboratory reference ranges
  • Potential for overlapping symptoms with other codes

Audit Risk Factors

  • Insufficient documentation linking findings to clinical conditions
  • Use of R79.8 when more specific codes are available
  • Inconsistent laboratory results without follow-up
  • Failure to document the reason for testing

Specialty Focus

Medical Specialties

Internal Medicine

Documentation Requirements

Detailed patient history, lab results, and clinical correlation are essential. Documentation should include the reason for testing and any follow-up actions taken.

Common Clinical Scenarios

Patients presenting with fatigue, unexplained weight loss, or other nonspecific symptoms prompting a comprehensive metabolic panel.

Billing Considerations

Consider the patient's overall health status and any chronic conditions that may influence lab results.

Emergency Medicine

Documentation Requirements

Acute care documentation must include immediate lab findings, clinical symptoms, and any interventions performed.

Common Clinical Scenarios

Patients presenting with acute abdominal pain or altered mental status where blood chemistry abnormalities are identified.

Billing Considerations

Rapid assessment and documentation are critical, as abnormal findings may necessitate urgent interventions.

Coding Guidelines

Inclusion Criteria

Use R79.8 When
  • Coders should refer to the official ICD
  • CM guidelines, ensuring that the code is used only when the abnormal findings are not classified elsewhere
  • Documentation must support the use of R79
  • 8, linking it to the patient's clinical presentation

Exclusion Criteria

Do NOT use R79.8 When
No specific exclusions found.

Related CPT Codes

80053CPT Code

Comprehensive metabolic panel

Clinical Scenario

When a comprehensive metabolic panel is performed to assess multiple blood chemistry parameters.

Documentation Requirements

Document the reason for the panel and any abnormal findings.

Specialty Considerations

Internal medicine and family practice often utilize this panel for routine health assessments.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of abnormal findings, improving the granularity of data collection and enhancing the ability to track patient outcomes related to blood chemistry abnormalities.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of abnormal findings, improving the granularity of data collection and enhancing the ability to track patient outcomes related to blood chemistry abnormalities.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of abnormal findings, improving the granularity of data collection and enhancing the ability to track patient outcomes related to blood chemistry abnormalities.

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

When should I use R79.8?

Use R79.8 when you encounter abnormal blood chemistry findings that do not have a more specific code available. Ensure that the documentation supports the abnormal findings and their clinical significance.