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ICD-10 Guide
ICD-10 CodesChapter 3: Diseases of the blood and blood-forming organsD84

D84

Billable

Other immunodeficiencies

Chapter 3:Diseases of the blood and blood-forming organs

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/05/2025

Code Description

ICD-10 D84 is a billable code used to indicate a diagnosis of other immunodeficiencies.

Key Diagnostic Point:

D84 encompasses a variety of immunodeficiency disorders that do not fall under the more specific categories of primary or secondary immunodeficiencies. These conditions can result from genetic defects, environmental factors, or other underlying health issues that compromise the immune system's ability to function effectively. Patients with D84 may experience recurrent infections, autoimmune disorders, or malignancies due to their impaired immune response. The classification includes conditions such as common variable immunodeficiency (CVID), specific antibody deficiency, and other rare syndromes that lead to inadequate immune function. Diagnosis often involves a combination of clinical evaluation, laboratory tests to assess immune function, and genetic testing. Management may include immunoglobulin replacement therapy, prophylactic antibiotics, and treatment of associated complications, making it essential for coders to understand the nuances of each patient's condition and treatment plan.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variety of underlying causes leading to immunodeficiency.
  • Need for comprehensive documentation of clinical history and laboratory results.
  • Potential overlap with other immunodeficiency codes.
  • Variability in treatment approaches and associated complications.

Audit Risk Factors

  • Inadequate documentation of the specific immunodeficiency type.
  • Failure to link the diagnosis to clinical findings or treatment.
  • Misclassification of immunodeficiency severity.
  • Lack of supporting laboratory results.

Specialty Focus

Medical Specialties

Immunology

Documentation Requirements

Detailed immunological assessment results, patient history, and treatment plans.

Common Clinical Scenarios

Patients presenting with recurrent infections, autoimmune disorders, or unexplained lymphadenopathy.

Billing Considerations

Ensure that all laboratory tests and clinical evaluations are documented to support the diagnosis.

Hematology

Documentation Requirements

Complete blood counts, bone marrow biopsy results, and any relevant genetic testing.

Common Clinical Scenarios

Patients with hematologic malignancies or cytopenias associated with immunodeficiency.

Billing Considerations

Document any co-existing hematologic conditions that may complicate the immunodeficiency.

Coding Guidelines

Inclusion Criteria

Use D84 When
  • According to ICD
  • 10 guidelines, D84 should be used when the immunodeficiency does not fit into more specific categories
  • Coders must ensure that the diagnosis is supported by clinical documentation and laboratory findings
  • defined under other codes

Exclusion Criteria

Do NOT use D84 When
  • Exclusion criteria include conditions that are well

Related CPT Codes

36415CPT Code

Collection of venous blood by venipuncture

Clinical Scenario

Used for laboratory tests to assess immune function.

Documentation Requirements

Document the reason for blood draw and any relevant clinical history.

Specialty Considerations

Ensure that the specialty performing the test is noted.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of immunodeficiencies, improving the ability to capture the nuances of these conditions. D84 provides a broader category for immunodeficiencies that do not fit neatly into other classifications, enhancing the accuracy of patient records and treatment plans.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of immunodeficiencies, improving the ability to capture the nuances of these conditions. D84 provides a broader category for immunodeficiencies that do not fit neatly into other classifications, enhancing the accuracy of patient records and treatment plans.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of immunodeficiencies, improving the ability to capture the nuances of these conditions. D84 provides a broader category for immunodeficiencies that do not fit neatly into other classifications, enhancing the accuracy of patient records and treatment plans.

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

What types of conditions are included under D84?

D84 includes a variety of immunodeficiencies that do not fall under more specific categories, such as common variable immunodeficiency and specific antibody deficiency.

How do I ensure accurate coding for D84?

Accurate coding for D84 requires detailed documentation of the patient's clinical history, laboratory results, and treatment plans to support the diagnosis.