Other infectious diseases
ICD-10 Codes (0)
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Updates & Changes
FY 2026 Updates
New Codes (1)
Revised Codes (2)
Deleted Codes
No codes deleted in this range for FY 2026
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 B99-B99 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
The ICD-10 code range B99-B99 is designated for 'Other infectious diseases'. This category is used to code infectious diseases that are not classified elsewhere in the ICD-10. It includes diseases caused by various types of infectious agents, such as bacteria, viruses, fungi, and parasites. The codes in this category are used to document conditions that are confirmed as infectious, but do not have a specific code elsewhere in the ICD-10.
Key Usage Points:
- •Use B99-B99 for infectious diseases not classified elsewhere.
- •Ensure the condition is confirmed as infectious.
- •Do not use if a more specific code exists elsewhere in the ICD-10.
- •Always code to the highest level of specificity.
- •Remember to code also any associated symptoms or conditions.
Coding Guidelines
When to Use:
- ✓When an infectious disease is diagnosed but does not have a specific code elsewhere.
- ✓When the infectious agent is known but the disease is not classified under a specific code.
- ✓When coding for diseases caused by multiple infectious agents.
- ✓When coding for diseases with an infectious origin, but the specific agent is not known.
When NOT to Use:
- ✗When a more specific code exists for the infectious disease.
- ✗When the condition is suspected or possible, but not confirmed.
- ✗When the condition is non-infectious in nature.
- ✗When coding for carrier or suspected status of infectious diseases.
Code Exclusions
Always verify exclusions by cross-referencing with the ICD-10 manual.
Documentation Requirements
Proper documentation for B99-B99 codes requires clear, detailed clinical information. The documentation should confirm the infectious nature of the disease and provide as much information as possible about the infectious agent, if known.
Clinical Information:
- •Confirmation of infectious nature of the disease.
- •Details about the infectious agent, if known.
- •Information about any associated symptoms or conditions.
- •Details about the course of the disease.
- •Information about any treatments provided.
Supporting Evidence:
- •Lab reports confirming infectious nature.
- •Imaging studies, if applicable.
- •Notes from consultations with infectious disease specialists.
- •Patient history and physical examination notes.
Good Documentation Example:
Patient diagnosed with an infectious disease caused by a rare bacteria. Lab reports confirm the presence of the bacteria. Patient presents with fever, fatigue, and localized pain.
Poor Documentation Example:
Patient has an infection.
Common Documentation Errors:
- ⚠Not confirming the infectious nature of the disease.
- ⚠Not providing enough details about the infectious agent.
- ⚠Not coding associated symptoms or conditions.
- ⚠Not coding to the highest level of specificity.
Range Statistics
Coding Complexity
The coding complexity for B99-B99 is medium due to the need to confirm the infectious nature of the disease, identify the infectious agent if possible, code any associated symptoms or conditions, and avoid using these codes if a more specific code exists.
Key Factors:
- ▸Need to confirm infectious nature of the disease.
- ▸Need to identify the infectious agent, if possible.
- ▸Need to code any associated symptoms or conditions.
- ▸Need to avoid using these codes if a more specific code exists.
Specialty Focus
The B99-B99 code range is most commonly used by infectious disease specialists, but can also be used by primary care providers, hospitalists, and other specialists when dealing with infectious diseases.
Primary Specialties:
Clinical Scenarios:
- • Patient presents with a rare bacterial infection not classified elsewhere in the ICD-10.
- • Patient diagnosed with a viral disease caused by a novel virus.
- • Patient with a fungal infection not classified under a specific code.
- • Patient with a parasitic disease that does not have a specific code.
Resources & References
Resources for B99-B99 codes include the ICD-10 manual, official coding guidelines, and clinical reference materials. Educational materials can also be helpful for understanding and applying these codes.
Official Guidelines:
- ICD-10-CM Official Guidelines for Coding and Reporting
- CDC ICD-10 guidelines
- WHO ICD-10 guidelines
Clinical References:
- Infectious Disease Society of America guidelines
- CDC resources on infectious diseases
Educational Materials:
- AAPC ICD-10 training
- AHIMA ICD-10 resources
Frequently Asked Questions
Can B99-B99 codes be used for suspected or possible infectious diseases?
No, B99-B99 codes should only be used for confirmed infectious diseases.