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v1.0.0
ICD-10 Guide
ICD-10 CodesB70

B70

Diphtheria

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

Code Description

ICD-10 B70 is a billable code used to indicate a diagnosis of diphtheria.

Key Diagnostic Point:

Diphtheria is a serious bacterial infection caused by Corynebacterium diphtheriae, which primarily affects the mucous membranes of the throat and nose. The disease is characterized by the formation of a thick, gray membrane in the throat that can obstruct breathing and swallowing. Symptoms often include sore throat, fever, swollen lymph nodes, and malaise. Diphtheria can lead to severe complications, including myocarditis, neuropathy, and respiratory failure if not treated promptly. The infection is transmitted through respiratory droplets or contact with contaminated surfaces. Vaccination with the diphtheria toxoid is a key preventive measure, and treatment typically involves the administration of diphtheria antitoxin and antibiotics such as penicillin or erythromycin. Early diagnosis and intervention are crucial to reduce morbidity and mortality associated with this disease.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiating between diphtheria and other upper respiratory infections
  • Understanding the need for vaccination history documentation
  • Identifying complications that may arise from the infection
  • Navigating the use of antitoxin and antibiotic treatments in coding

Audit Risk Factors

  • Inadequate documentation of vaccination status
  • Failure to document the presence of complications
  • Misclassification of the type of diphtheria (e.g., respiratory vs. cutaneous)
  • Incorrect coding of associated treatments or procedures

Specialty Focus

Medical Specialties

Infectious Disease

Documentation Requirements

Detailed clinical notes on symptoms, treatment plans, and follow-up care.

Common Clinical Scenarios

Patients presenting with respiratory symptoms and a history of exposure to diphtheria.

Billing Considerations

Ensure thorough documentation of laboratory results confirming the diagnosis.

Pediatrics

Documentation Requirements

Vaccination history and growth/development assessments.

Common Clinical Scenarios

Children presenting with sore throat and fever, especially in unvaccinated populations.

Billing Considerations

Documenting the child's immunization status is critical for accurate coding.

Coding Guidelines

Inclusion Criteria

Use B70 When
  • Follow the official ICD
  • CM coding guidelines, ensuring accurate documentation of the diagnosis, treatment, and any complications
  • Include relevant history and clinical findings

Exclusion Criteria

Do NOT use B70 When
No specific exclusions found.

Related Codes

Child Codes

2 codes
B70.0
Diphtheria due to Corynebacterium diphtheriae
B70.1
Diphyllobothriasis

Related CPT Codes

90375CPT Code

Diphtheria toxoid vaccine administration

Clinical Scenario

Administering the vaccine to prevent diphtheria in at-risk populations.

Documentation Requirements

Document the vaccine type, dosage, and patient consent.

Specialty Considerations

Pediatricians should ensure proper immunization schedules are followed.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of diphtheria, improving the accuracy of data collection and reimbursement processes.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of diphtheria, improving the accuracy of data collection and reimbursement processes.

Reimbursement & Billing Impact

reimbursement processes.

Resources

Clinical References

  • •
    CDC Diphtheria Information

Coding & Billing References

  • •
    CDC Diphtheria Information

Frequently Asked Questions

What is the primary treatment for diphtheria?

The primary treatment for diphtheria includes the administration of diphtheria antitoxin and antibiotics such as penicillin or erythromycin.