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ICD-10 Guide
ICD-10 CodesR94.8

R94.8

Abnormal results of function studies of other organs and systems

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

Code Description

ICD-10 R94.8 is a billable code used to indicate a diagnosis of abnormal results of function studies of other organs and systems.

Key Diagnostic Point:

R94.8 is used to classify abnormal results from function studies of various organs and systems that do not fall under more specific categories. This code encompasses a wide range of abnormal findings that may arise from diagnostic tests assessing organ function, such as pulmonary function tests, cardiac stress tests, or endocrine function tests. These abnormalities can indicate underlying pathologies, such as respiratory disorders, cardiovascular diseases, or hormonal imbalances. The clinical context for using R94.8 is broad, as it may be applied in cases where the specific abnormality is not clearly defined or when multiple systems are involved. Common causes of abnormal results may include chronic diseases, acute conditions, or even transient physiological changes. Accurate documentation of the tests performed, the results obtained, and the clinical significance of these findings is essential for proper coding and reimbursement.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variety of tests and systems involved
  • Need for precise documentation of abnormal findings
  • Potential overlap with other codes
  • Clinical significance may vary widely

Audit Risk Factors

  • Inadequate documentation of test results
  • Failure to specify the organ/system involved
  • Misuse of the code when more specific codes are available
  • Lack of clinical correlation with abnormal findings

Specialty Focus

Medical Specialties

Internal Medicine

Documentation Requirements

Thorough documentation of the patient's history, physical examination findings, and the specific tests performed, along with their results.

Common Clinical Scenarios

Patients presenting with unexplained fatigue, shortness of breath, or abnormal lab results requiring further investigation.

Billing Considerations

Ensure that the clinical significance of the abnormal findings is clearly articulated in the documentation.

Emergency Medicine

Documentation Requirements

Detailed documentation of acute presentations, including vital signs, lab results, and any immediate interventions taken.

Common Clinical Scenarios

Patients with acute chest pain, altered mental status, or respiratory distress where function studies are performed rapidly.

Billing Considerations

Document the urgency of the situation and the rationale for the tests ordered to support the use of R94.8.

Coding Guidelines

Inclusion Criteria

Use R94.8 When
  • Follow official coding guidelines that emphasize the need for specificity in documentation
  • Ensure that the abnormal findings are clearly linked to the clinical context and that all relevant tests are documented

Exclusion Criteria

Do NOT use R94.8 When
No specific exclusions found.

Related CPT Codes

94010CPT Code

Spirometry

Clinical Scenario

Used to assess lung function in patients with respiratory symptoms.

Documentation Requirements

Document the indication for the test and the results.

Specialty Considerations

Pulmonologists should ensure that the clinical context is clear.

93000CPT Code

Electrocardiogram (ECG)

Clinical Scenario

Performed in patients with chest pain to assess cardiac function.

Documentation Requirements

Document the reason for the ECG and any abnormal findings.

Specialty Considerations

Cardiologists should correlate ECG findings with clinical symptoms.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specificity in coding, but R94.8 remains a catch-all for abnormal function studies. Coders must be diligent in ensuring that documentation supports the use of this code.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specificity in coding, but R94.8 remains a catch-all for abnormal function studies. Coders must be diligent in ensuring that documentation supports the use of this code.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specificity in coding, but R94.8 remains a catch-all for abnormal function studies. Coders must be diligent in ensuring that documentation supports the use of this code.

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 R94.8?

Use R94.8 when you have abnormal results from function studies that do not fit into more specific categories. Ensure that the documentation clearly supports the use of this code.

What are common tests that might lead to R94.8?

Common tests include pulmonary function tests, cardiac stress tests, and endocrine function tests. Document the results and their clinical significance.