B95-B97
Medium Complexity

Bacterial and viral infectious agents

Primary Specialty: Infectious Disease
Last Updated: 2025-09-09

ICD-10 Codes (44)

36 billable
2 category headers
B96
Bacterial agents as the cause of diseases classified elsewhere
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B96.0
Billable
Pneumococcal meningitis
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B96.1
Billable
Bacterial pneumonia, not elsewhere classified
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B96.2
Escherichia coli [E. coli] as the cause of diseases classified elsewhere
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B96.20
Billable
Unspecified Escherichia coli [E. coli] as the cause of diseases classified elsewhere
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B96.21
Billable
Shiga toxin-producing Escherichia coli [E. coli] [STEC] O157 as the cause of diseases classified elsewhere
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B96.22
Billable
Other specified Shiga toxin-producing Escherichia coli [E. coli] [STEC] as the cause of diseases classified elsewhere
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B96.23
Billable
Unspecified Shiga toxin-producing Escherichia coli [E. coli] [STEC] as the cause of diseases classified elsewhere
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B96.29
Billable
Other Escherichia coli [E. coli] as the cause of diseases classified elsewhere
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B96.3
Billable
Mycoplasma pneumoniae as the cause of diseases classified elsewhere
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B96.4
Billable
Bacterial agents as the cause of diseases classified elsewhere
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B96.5
Billable
Pseudomonas (aeruginosa) as the cause of diseases classified elsewhere
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B96.6
Billable
Legionnaires' disease
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B96.7
Billable
Bacterial agents as the cause of diseases classified elsewhere
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B96.8
Other specified bacterial agents as the cause of diseases classified elsewhere
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B96.81
Billable
Helicobacter pylori [H. pylori] as the cause of diseases classified elsewhere
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B96.82
Billable
Vibrio vulnificus as the cause of diseases classified elsewhere
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B96.83
Billable
Acinetobacter baumannii as the cause of diseases classified elsewhere
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B96.89
Billable
Other specified bacterial agents as the cause of diseases classified elsewhere
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B97
Viral agents as the cause of diseases classified elsewhere
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B97.0
Billable
COVID-19, virus not identified
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B97.1
Enterovirus as the cause of diseases classified elsewhere
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B97.10
Billable
Unspecified enterovirus as the cause of diseases classified elsewhere
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B97.11
Billable
Coxsackievirus as the cause of diseases classified elsewhere
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B97.12
Billable
Echovirus as the cause of diseases classified elsewhere
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B97.19
Billable
Other enterovirus as the cause of diseases classified elsewhere
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B97.2
Coronavirus as the cause of diseases classified elsewhere
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B97.21
Billable
SARS-associated coronavirus as the cause of diseases classified elsewhere
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B97.29
Billable
Other coronavirus as the cause of diseases classified elsewhere
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B97.3
Coronavirus as the cause of diseases classified elsewhere
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B97.30
Billable
Unspecified retrovirus as the cause of diseases classified elsewhere
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B97.31
Billable
Lentivirus as the cause of diseases classified elsewhere
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B97.32
Billable
Oncovirus as the cause of diseases classified elsewhere
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B97.33
Billable
Human T-cell lymphotrophic virus, type I [HTLV-I] as the cause of diseases classified elsewhere
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B97.34
Billable
Human T-cell lymphotrophic virus, type II [HTLV-II] as the cause of diseases classified elsewhere
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B97.35
Billable
Human immunodeficiency virus, type 2 [HIV 2] as the cause of diseases classified elsewhere
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B97.39
Billable
Other retrovirus as the cause of diseases classified elsewhere
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B97.4
Billable
COVID-19, virus not identified
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B97.5
Billable
Papillomavirus as the cause of diseases classified elsewhere
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B97.6
Billable
Respiratory syncytial virus (RSV) as the cause of diseases classified elsewhere
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B97.7
Billable
Coronavirus as the cause of diseases classified elsewhere
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B97.8
Other viral agents as the cause of diseases classified elsewhere
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B97.81
Billable
Human metapneumovirus as the cause of diseases classified elsewhere
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B97.89
Billable
Other viral agents as the cause of diseases classified elsewhere
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Updates & Changes

FY 2026 Updates

Current Year

New Codes (1)

B08.62
Orf virus disease with complications

Revised Codes (2)

B00.9
Herpesviral infection, unspecified - updated to include HSV type specification when known
B08.5
Enteroviral vesicular pharyngitis - enhanced diagnostic specificity

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 B95-B97 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 ICD-10 category B95-B97 represents codes for bacterial and viral infectious agents. These codes are used to indicate the infectious agent responsible for diseases classified elsewhere. They are secondary codes, used in conjunction with primary disease codes to provide a more comprehensive picture of the patient's condition. They cover a wide range of infectious agents, from Streptococcus and Staphylococcus to Influenza virus and Human Immunodeficiency Virus (HIV).

Key Usage Points:

  • •Always code the disease first, followed by the B95-B97 code to identify the infectious agent.
  • •These codes are not used for the actual disease or infection, but to specify the causative agent.
  • •B95-B97 codes can be used in any healthcare setting, not just infectious disease specialties.
  • •These codes are not used for suspected infections; a confirmed diagnosis is required.
  • •Always verify the coding guidelines for the specific infectious agent code being used.

Coding Guidelines

When to Use:

  • ✓When a patient has a confirmed bacterial infection, such as Streptococcal pneumonia.
  • ✓When a patient has a confirmed viral infection, such as Influenza.
  • ✓When coding for diseases where the infectious agent is known and relevant to the treatment.
  • ✓When the infectious agent has a significant impact on the prognosis or treatment of the disease.

When NOT to Use:

  • ✗When the infectious agent is not confirmed.
  • ✗When the infectious agent is not relevant to the disease or treatment.
  • ✗When the infectious agent is not known.
  • ✗When the patient is only suspected of having an infection.

Code Exclusions

Always verify exclusions with the latest ICD-10-CM Official Guidelines for Coding and Reporting.

Documentation Requirements

Documentation for B95-B97 codes should clearly identify the infectious agent involved in the patient's condition. It should be based on confirmed diagnoses, not suspected infections. The documentation should also justify the relevance of the infectious agent to the patient's condition or treatment.

Clinical Information:

  • •Confirmed diagnosis of the disease
  • •Confirmed identification of the infectious agent
  • •Relevance of the infectious agent to the disease or treatment
  • •Source of the confirmation (lab results, clinical findings, etc.)

Supporting Evidence:

  • •Lab reports confirming the infectious agent
  • •Clinical notes detailing the diagnosis and treatment
  • •Any relevant imaging or diagnostic reports
Good Documentation Example:

Patient diagnosed with pneumonia caused by Streptococcus pneumoniae, confirmed by sputum culture. Antibiotic treatment initiated.

Poor Documentation Example:

Patient has pneumonia, possibly bacterial.

Common Documentation Errors:

  • âš Not confirming the infectious agent
  • âš Not documenting the relevance of the infectious agent
  • âš Using these codes for suspected infections

Range Statistics

9
Total Codes
36
Billable
Complexity:
Medium
Primary Use:Clinical Documentation
Chapter:

Coding Complexity

Medium
Complexity Rating

While the concept of these codes is straightforward, their application can be complex. Coders need to understand when it's appropriate to use these codes and how to confirm the infectious agent. They also need to understand the relevance of the infectious agent to the patient's disease or treatment.

Key Factors:
  • â–¸Understanding the difference between disease codes and infectious agent codes
  • â–¸Knowing when to use these codes
  • â–¸Confirming the infectious agent
  • â–¸Understanding the relevance of the infectious agent to the disease or treatment

Specialty Focus

While B95-B97 codes can be used in any healthcare setting, they are particularly relevant in specialties dealing with infectious diseases, such as Infectious Disease, Pulmonology, and Internal Medicine.

Primary Specialties:
Infectious Disease
40%
Pulmonology
30%
Clinical Scenarios:
  • • A patient with a confirmed diagnosis of pneumonia caused by Streptococcus pneumoniae.
  • • A patient with a skin infection caused by Staphylococcus aureus.
  • • A patient with meningitis caused by Neisseria meningitidis.
  • • A patient with a respiratory infection caused by Influenza virus.

Resources & References

The ICD-10-CM Official Guidelines for Coding and Reporting is the primary resource for coding these conditions. Clinical resources such as the Merck Manual and the CDC's website can provide additional context and information.

Official Guidelines:

  • ICD-10-CM Official Guidelines for Coding and Reporting
  • CDC's ICD-10-CM resources
  • WHO's ICD-10 resources

Clinical References:

  • Merck Manual
  • CDC's website

Educational Materials:

  • AAPC's ICD-10 training
  • AHIMA's ICD-10 resources

Frequently Asked Questions

Can B95-B97 codes be used for suspected infections?

No, these codes should only be used for confirmed infections.