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ICD-10 Guide
ICD-10 CodesR89.4

R89.4

Abnormal immunological findings in specimens from other organs, systems and tissues

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

Code Description

ICD-10 R89.4 is a billable code used to indicate a diagnosis of abnormal immunological findings in specimens from other organs, systems and tissues.

Key Diagnostic Point:

R89.4 is used to classify abnormal immunological findings in specimens obtained from various organs, systems, and tissues that do not fall under more specific categories. These findings may include atypical immune responses, abnormal levels of immunoglobulins, or unexpected results from immunological assays. Such abnormalities can indicate underlying conditions such as autoimmune diseases, infections, malignancies, or other systemic disorders. The clinical significance of these findings often necessitates further investigation to determine the underlying cause and appropriate management. It is crucial for healthcare providers to document the context of these findings, including the specific tests performed and the clinical symptoms present, to ensure accurate coding and billing.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variety of potential underlying conditions
  • Need for comprehensive documentation
  • Differentiation from other immunological codes
  • Interpretation of lab results can vary

Audit Risk Factors

  • Inadequate documentation of the clinical context
  • Failure to specify the type of specimen tested
  • Misinterpretation of lab results leading to incorrect coding
  • Lack of follow-up documentation for abnormal findings

Specialty Focus

Medical Specialties

Internal Medicine

Documentation Requirements

Detailed documentation of patient history, clinical findings, and specific tests performed is essential.

Common Clinical Scenarios

Patients presenting with unexplained fatigue, joint pain, or recurrent infections may undergo immunological testing.

Billing Considerations

Ensure that all relevant lab results are included in the documentation to support the diagnosis.

Emergency Medicine

Documentation Requirements

Acute care documentation must include immediate clinical findings and rationale for immunological testing.

Common Clinical Scenarios

Patients with acute allergic reactions or suspected sepsis may require rapid immunological assessment.

Billing Considerations

Document the urgency of the situation and any immediate interventions taken.

Coding Guidelines

Inclusion Criteria

Use R89.4 When
  • Follow the official ICD
  • CM coding guidelines, ensuring that the code is used only when the abnormal immunological findings are not classified elsewhere
  • Document the clinical significance of the findings and any follow
  • up actions taken

Exclusion Criteria

Do NOT use R89.4 When
No specific exclusions found.

Related CPT Codes

86001CPT Code

Immunology test, quantitative

Clinical Scenario

Used when performing immunological assays to evaluate abnormal findings.

Documentation Requirements

Document the specific tests performed and the rationale for testing.

Specialty Considerations

In immunology, ensure that all relevant clinical information is included to support the necessity of the tests.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of immunological findings, improving the ability to capture the complexity of these conditions. R89.4 provides a means to document findings that do not fit neatly into other categories, enhancing data accuracy and clinical understanding.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of immunological findings, improving the ability to capture the complexity of these conditions. R89.4 provides a means to document findings that do not fit neatly into other categories, enhancing data accuracy and clinical understanding.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of immunological findings, improving the ability to capture the complexity of these conditions. R89.4 provides a means to document findings that do not fit neatly into other categories, enhancing data accuracy and clinical understanding.

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 R89.4?

Use R89.4 when you encounter abnormal immunological findings in specimens from organs, systems, or tissues that do not have a more specific code available. Ensure that the clinical context is well documented.