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v1.0.0
ICD-10 Guide
ICD-10 CodesZ22.33

Z22.33

Carrier of bacterial disease due to streptococci

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/12/2025

Code Description

ICD-10 Z22.33 is a billable code used to indicate a diagnosis of carrier of bacterial disease due to streptococci.

Key Diagnostic Point:

Z22.33 identifies individuals who are carriers of bacterial diseases caused by streptococci, which can include various strains responsible for conditions such as strep throat, scarlet fever, and rheumatic fever. Carriers may not exhibit symptoms but can transmit the bacteria to others, posing a public health risk. Understanding the social determinants of health is crucial, as factors such as socioeconomic status, access to healthcare, and living conditions can influence the prevalence of streptococcal infections. Preventive care strategies include education on hygiene practices, vaccination where applicable, and regular screenings in high-risk populations. Screening for carriers is essential in controlling outbreaks, particularly in communal settings like schools and daycare centers. Aftercare may involve monitoring for symptoms in carriers and educating them on the importance of informing healthcare providers about their carrier status to prevent transmission.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Need for accurate documentation of carrier status without active disease
  • Potential for misclassification with symptomatic streptococcal infections
  • Variability in public health reporting requirements
  • Understanding of social determinants impacting carrier prevalence

Audit Risk Factors

  • Inadequate documentation of carrier status
  • Failure to link Z code with appropriate preventive services
  • Misuse of Z code in the presence of active disease
  • Lack of follow-up documentation for carriers

Specialty Focus

Medical Specialties

Primary Care

Documentation Requirements

Documentation should include patient history, carrier status confirmation, and preventive measures discussed.

Common Clinical Scenarios

Routine checkups where carrier status is identified, screenings for strep in asymptomatic individuals, and aftercare follow-ups.

Billing Considerations

Consideration of social determinants such as living conditions and access to healthcare resources that may affect carrier status.

Public Health

Documentation Requirements

Documentation must include population-level data, surveillance reports, and tracking of carrier prevalence in communities.

Common Clinical Scenarios

Epidemiological studies, outbreak investigations, and community health screenings.

Billing Considerations

Focus on reporting and tracking health status to inform public health interventions.

Coding Guidelines

Inclusion Criteria

Use Z22.33 When
  • Z codes are used when a patient is not currently ill but requires monitoring or preventive care
  • 33 should be sequenced appropriately, often as a secondary diagnosis when a related condition is present
  • Payer requirements may vary, so it is essential to verify coverage for preventive services linked to carrier status

Exclusion Criteria

Do NOT use Z22.33 When
No specific exclusions found.

Related CPT Codes

99213CPT Code

Established patient office visit

Clinical Scenario

Used when a patient with carrier status comes in for a routine checkup.

Documentation Requirements

Documentation should include carrier status and preventive measures discussed.

Specialty Considerations

Primary care considerations include ongoing monitoring and education.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for greater specificity in coding carrier statuses, improving data accuracy for public health tracking and preventive care.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for greater specificity in coding carrier statuses, improving data accuracy for public health tracking and preventive care.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for greater specificity in coding carrier statuses, improving data accuracy for public health tracking and preventive care.

Resources

Clinical References

  • •
    CDC Guidelines on Streptococcal Infections

Coding & Billing References

  • •
    CDC Guidelines on Streptococcal Infections

Frequently Asked Questions

What should be documented to support the use of Z22.33?

Documentation should include confirmation of carrier status, any preventive measures discussed, and follow-up plans to monitor for symptoms or transmission.