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ICD-10 Guide
ICD-10 CodesZ22.1

Z22.1

Carrier of other intestinal infectious diseases

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

Code Description

ICD-10 Z22.1 is a billable code used to indicate a diagnosis of carrier of other intestinal infectious diseases.

Key Diagnostic Point:

Z22.1 identifies individuals who are carriers of intestinal infectious diseases, which can include pathogens like Salmonella, Shigella, and others. Carriers may not exhibit symptoms but can transmit the disease to others, making it crucial for public health monitoring and preventive measures. Social determinants of health, such as access to clean water, sanitation, and healthcare services, significantly influence the risk of becoming a carrier. Preventive care includes education on hygiene practices, vaccination where applicable, and regular screenings in high-risk populations. Screening for carriers is vital in controlling outbreaks, especially in communal living situations or food handling professions. Aftercare focuses on monitoring health status and ensuring that carriers are informed about their condition to prevent transmission.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Need for thorough patient history to identify potential exposure.
  • Documentation of asymptomatic status while being a carrier.
  • Understanding of public health implications and reporting requirements.
  • Differentiation from symptomatic intestinal infections.

Audit Risk Factors

  • Inadequate documentation of carrier status.
  • Failure to report potential outbreaks to public health authorities.
  • Misclassification of symptomatic infections as carrier status.
  • Lack of follow-up documentation for carriers.

Specialty Focus

Medical Specialties

Primary Care

Documentation Requirements

Document patient history, risk factors, and any preventive measures taken.

Common Clinical Scenarios

Routine checkups where carrier status is identified, follow-up visits for monitoring.

Billing Considerations

Consider social determinants such as living conditions and access to healthcare.

Public Health

Documentation Requirements

Detailed records for epidemiological tracking and reporting to health authorities.

Common Clinical Scenarios

Investigating outbreaks, community health screenings.

Billing Considerations

Focus on population health and preventive strategies.

Coding Guidelines

Inclusion Criteria

Use Z22.1 When
  • Z codes are used primarily when a patient is not currently ill but requires monitoring or preventive care
  • When coding Z22
  • 1, ensure it is sequenced correctly, typically following any acute diagnosis
  • Payer requirements may vary, so check specific guidelines for preventive services

Exclusion Criteria

Do NOT use Z22.1 When
No specific exclusions found.

Related CPT Codes

99385CPT Code

Initial preventive medicine evaluation and management, new patient, age 18-39

Clinical Scenario

Used during routine checkups where carrier status is assessed.

Documentation Requirements

Document preventive services provided and any risk factors discussed.

Specialty Considerations

Primary care focus on preventive health.

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 tracking and management of infectious diseases.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for greater specificity in coding carrier statuses, improving tracking and management of infectious diseases.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for greater specificity in coding carrier statuses, improving tracking and management of infectious diseases.

Resources

Clinical References

  • •
    CDC Guidelines on Infectious Disease Carriers

Coding & Billing References

  • •
    CDC Guidelines on Infectious Disease Carriers

Frequently Asked Questions

What should I document when coding Z22.1?

Document the patient's carrier status, any preventive measures taken, and the absence of symptoms. Include risk factors and any education provided to the patient regarding hygiene and transmission prevention.