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v1.0.0
ICD-10 Guide
ICD-10 CodesD83.9

D83.9

Billable

Common variable immunodeficiency, unspecified

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

Code Description

ICD-10 D83.9 is a billable code used to indicate a diagnosis of common variable immunodeficiency, unspecified.

Key Diagnostic Point:

Common variable immunodeficiency (CVID) is a primary immunodeficiency disorder characterized by a significant reduction in serum immunoglobulin levels and an increased susceptibility to infections. Patients with CVID often experience recurrent bacterial infections, particularly of the respiratory and gastrointestinal tracts, due to impaired antibody production. The condition can also lead to autoimmune disorders, lymphoproliferative diseases, and an increased risk of malignancies. The etiology of CVID is heterogeneous, with both genetic and environmental factors contributing to its development. Diagnosis typically involves measuring serum immunoglobulin levels, assessing specific antibody responses, and ruling out other causes of hypogammaglobulinemia. The unspecified designation indicates that the specific subtype or underlying cause of the immunodeficiency has not been determined, which can complicate management and treatment strategies. Treatment often includes immunoglobulin replacement therapy and prophylactic antibiotics to prevent infections, along with monitoring for associated complications.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in clinical presentation and severity among patients
  • Need for comprehensive immunological testing for accurate diagnosis
  • Potential overlap with other immunodeficiency disorders
  • Documentation of recurrent infections and autoimmune manifestations

Audit Risk Factors

  • Inadequate documentation of recurrent infections
  • Failure to document immunoglobulin levels and treatment response
  • Lack of clarity on the unspecified nature of the condition
  • Misclassification of CVID as a secondary immunodeficiency

Specialty Focus

Medical Specialties

Immunology

Documentation Requirements

Detailed immunological testing results, treatment plans, and follow-up notes.

Common Clinical Scenarios

Patients presenting with recurrent infections, autoimmune symptoms, or family history of immunodeficiency.

Billing Considerations

Ensure clear documentation of immunoglobulin levels and response to therapy.

Hematology

Documentation Requirements

Complete blood counts, bone marrow biopsy results, and any hematological complications.

Common Clinical Scenarios

Patients with CVID presenting with cytopenias or lymphoproliferative disorders.

Billing Considerations

Document any hematological manifestations and their management.

Coding Guidelines

Inclusion Criteria

Use D83.9 When
  • Follow ICD
  • CM guidelines for coding immunodeficiencies, ensuring accurate documentation of the condition's unspecified nature
  • Include relevant clinical details to support the diagnosis

Exclusion Criteria

Do NOT use D83.9 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

36415CPT Code

Collection of venous blood by venipuncture

Clinical Scenario

Used for obtaining blood samples to measure immunoglobulin levels.

Documentation Requirements

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

Specialty Considerations

Immunology specialists should ensure proper lab requisition forms are completed.

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 accuracy of diagnosis and treatment tracking for conditions like CVID.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of immunodeficiencies, improving the accuracy of diagnosis and treatment tracking for conditions like CVID.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of immunodeficiencies, improving the accuracy of diagnosis and treatment tracking for conditions like CVID.

Resources

Clinical References

  • •
    American Academy of Allergy, Asthma & Immunology

Coding & Billing References

  • •
    American Academy of Allergy, Asthma & Immunology

Frequently Asked Questions

What is the significance of the unspecified designation in D83.9?

The unspecified designation indicates that the specific subtype or underlying cause of the common variable immunodeficiency has not been determined, which can affect treatment and management strategies.