D80-D89
Medium Complexity
Certain disorders involving the immune mechanism
Primary Specialty: Allergy and Immunology
Last Updated: 2025-09-10
ICD-10 Codes (89)
89 billable0 category headers
D81Billable
D81.0Billable
D81.1Billable
D81.2Billable
D81.3Billable
D81.30Billable
D81.31Billable
D81.32Billable
D81.39Billable
D81.4Billable
D81.5Billable
D81.6Billable
D81.7Billable
D81.8Billable
D81.81Billable
D81.810Billable
D81.818Billable
D81.819Billable
D81.82Billable
D81.89Billable
D81.9Billable
D82Billable
D82.0Billable
D82.1Billable
D82.2Billable
D82.3Billable
D82.4Billable
D82.8Billable
D82.9Billable
D83Billable
D83.0Billable
D83.1Billable
D83.2Billable
D83.8Billable
D83.9Billable
D84Billable
D84.0Billable
D84.1Billable
D84.8Billable
D84.81Billable
D84.82Billable
D84.821Billable
D84.822Billable
D84.89Billable
D84.9Billable
D86Billable
D86.0Billable
D86.1Billable
D86.2Billable
D86.3Billable
D86.8Billable
D86.81Billable
D86.82Billable
D86.83Billable
D86.84Billable
D86.85Billable
D86.86Billable
D86.87Billable
D86.89Billable
D86.9Billable
D89Billable
D89.0Billable
D89.1Billable
D89.2Billable
D89.3Billable
D89.4Billable
D89.40Billable
D89.41Billable
D89.42Billable
D89.43Billable
D89.44Billable
D89.49Billable
D89.8Billable
D89.81Billable
D89.810Billable
D89.811Billable
D89.812Billable
D89.813Billable
D89.82Billable
D89.83Billable
D89.831Billable
D89.832Billable
D89.833Billable
D89.834Billable
D89.835Billable
D89.839Billable
D89.84Billable
D89.89Billable
D89.9Billable
Updates & Changes
FY 2026 Updates
Current Year
Deleted Codes
No codes deleted in this range for FY 2026
No significant changes for FY 2026
This range maintains stability with current coding practices
Historical Changes
- •FY 2025: Routine maintenance updates with minor terminology clarifications
- •FY 2024: Enhanced specificity requirements for certain code ranges
- •FY 2023: Updated documentation guidelines for improved clarity
Upcoming Changes
- •Proposed updates pending review by Coordination and Maintenance Committee
- •Under consideration: Enhanced digital health integration codes
Implementation Guidance
- •Review all FY 2026 updates for D80-D89 codes before implementation
- •Always verify the most current codes in the ICD-10-CM manual
- •Ensure clinical documentation supports the selected diagnosis codes
- +3 more guidance items...
Range Overview
high priority
The D80-D89 range in ICD-10 pertains to disorders involving the immune mechanism. This includes both primary and secondary immunodeficiencies, autoimmune diseases, and other diseases mediated by immune mechanisms. These codes are crucial for accurately documenting patient conditions and ensuring appropriate treatment and reimbursement.
Key Usage Points:
- •Always specify the type of immunodeficiency (primary or secondary) when coding.
- •For autoimmune diseases, indicate the organ or system involved.
- •Use additional codes to identify any associated conditions or complications.
- •Remember that some conditions have both an underlying etiology and multiple body system manifestations.
- •Always review the latest updates and changes in the ICD-10 guidelines.
Coding Guidelines
When to Use:
- ✓When a patient has a diagnosed immunodeficiency disorder.
- ✓When a patient presents with symptoms suggestive of an immune disorder.
- ✓When a patient has an autoimmune disease affecting a specific organ or system.
- ✓When a patient has a disease mediated by immune mechanisms, such as graft-versus-host disease.
When NOT to Use:
- ✗When a patient has an immune response to an infection, but no underlying immune disorder.
- ✗When a patient has a condition that is not primarily due to an immune mechanism.
- ✗When a patient has a temporary immune response due to medication or treatment.
- ✗When a patient has a condition that falls under another ICD-10 code range.
Code Exclusions
Always verify exclusions using the latest ICD-10 guidelines and updates.
Documentation Requirements
Accurate documentation is crucial for correct coding. It should include a clear diagnosis, details about the type of immune disorder, any associated conditions or complications, and the impact on the patient's health status.
Clinical Information:
- •Specific diagnosis
- •Type of immune disorder (primary or secondary)
- •Organ or system affected (for autoimmune diseases)
- •Associated conditions or complications
- •Impact on patient's health status
Supporting Evidence:
- •Laboratory test results
- •Imaging studies
- •Clinical notes
- •Specialist reports
Good Documentation Example:
Patient diagnosed with primary immunodeficiency disorder, specifically common variable immunodeficiency. Regular infections noted. Impact on health status significant.
Poor Documentation Example:
Patient has immune disorder.
Common Documentation Errors:
- âš Not specifying the type of immune disorder
- âš Not indicating the organ or system affected
- âš Not documenting associated conditions or complications
- âš Not detailing the impact on the patient's health status
Range Statistics
7
Total Codes
89
Billable
Complexity:
Medium
Primary Use:Clinical Documentation
Chapter:3
Coding Complexity
Medium
Complexity Rating
The complexity of coding within this range is considered medium. This is due to the need for detailed documentation, the specificity required in coding, and the need to keep up with updates and changes in the ICD-10 guidelines.
Key Factors:
- â–¸Need to specify the type of immune disorder
- â–¸Need to indicate the organ or system affected
- â–¸Need to document associated conditions or complications
- â–¸Need to keep up with updates and changes in the ICD-10 guidelines
Specialty Focus
These codes are most commonly used in specialties dealing with immunology, such as Allergy and Immunology, Rheumatology, and Infectious Disease.
Primary Specialties:
Allergy and Immunology
40%
Rheumatology
30%
Infectious Disease
30%
Clinical Scenarios:
- • A patient with recurrent infections diagnosed with common variable immunodeficiency.
- • A patient with systemic lupus erythematosus presenting with kidney involvement.
- • A patient with graft-versus-host disease following a bone marrow transplant.
- • A patient with secondary immunodeficiency due to long-term corticosteroid use.
Resources & References
Several resources are available to assist with coding within this range. These include the official ICD-10 guidelines, clinical reference sources, and educational materials.
Official Guidelines:
- Official ICD-10-CM Guidelines for Coding and Reporting
- American Health Information Management Association (AHIMA) resources
- Centers for Disease Control and Prevention (CDC) resources
- World Health Organization (WHO) resources
Clinical References:
- American Academy of Allergy, Asthma & Immunology (AAAAI) resources
- American College of Rheumatology (ACR) resources
Educational Materials:
- AHIMA ICD-10-CM Coding Workbook
- ICD-10-CM Expert for Physicians
Frequently Asked Questions
Can I use these codes for patients with temporary immune responses?
No, these codes are for disorders involving the immune mechanism, not temporary immune responses.