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v1.0.0
ICD-10 Guide
ICD-10 CodesZ58.6

Z58.6

Inadequate drinking-water supply

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

Code Description

ICD-10 Z58.6 is a billable code used to indicate a diagnosis of inadequate drinking-water supply.

Key Diagnostic Point:

Z58.6 refers to the inadequate drinking-water supply, which is a significant social determinant of health. Access to safe and sufficient drinking water is crucial for maintaining health and preventing disease. Inadequate water supply can lead to dehydration, increased risk of waterborne diseases, and can exacerbate existing health conditions. This Z code is often used in contexts where patients present with health issues related to poor water quality or availability, particularly in underserved communities. Preventive care strategies may include community health initiatives aimed at improving water access, education on water safety, and screening for waterborne illnesses. Health services may also focus on aftercare for patients affected by inadequate water supply, ensuring they receive appropriate treatment and follow-up care.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Varied documentation requirements based on patient demographics and location.
  • Potential overlap with other Z codes related to environmental factors.
  • Need for comprehensive assessment of social determinants affecting health.
  • Variability in payer requirements for coverage of related services.

Audit Risk Factors

  • Inadequate documentation of the patient's living conditions.
  • Failure to link the Z code to a primary diagnosis.
  • Lack of evidence for the impact of inadequate water supply on health outcomes.
  • Improper sequencing of Z codes with primary diagnoses.

Specialty Focus

Medical Specialties

Primary Care

Documentation Requirements

Document patient history regarding water access, symptoms related to dehydration or waterborne illnesses, and any preventive measures taken.

Common Clinical Scenarios

Routine checkups where patients report symptoms potentially linked to inadequate water supply, such as gastrointestinal issues.

Billing Considerations

Consideration of social determinants such as socioeconomic status and geographic location.

Public Health

Documentation Requirements

Population health data, community assessments, and surveillance reports on water quality and health outcomes.

Common Clinical Scenarios

Epidemiological studies assessing the impact of water supply on community health.

Billing Considerations

Focus on health education and community interventions to improve water access.

Coding Guidelines

Inclusion Criteria

Use Z58.6 When
  • Z codes are used to indicate factors influencing health status and should be used in conjunction with a primary diagnosis
  • Proper sequencing is essential, and documentation must support the use of Z58
  • Payer requirements may vary, so coders should verify coverage policies

Exclusion Criteria

Do NOT use Z58.6 When
No specific exclusions found.

Related CPT Codes

99401CPT Code

Preventive counseling visit

Clinical Scenario

Used during visits where water supply issues are discussed.

Documentation Requirements

Document counseling provided regarding water safety and health impacts.

Specialty Considerations

Primary care focus on preventive health education.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of social determinants like inadequate water supply, improving data collection and health service planning.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of social determinants like inadequate water supply, improving data collection and health service planning.

Reimbursement & Billing Impact

impacts, and any preventive measures taken.

Resources

Clinical References

  • •
    CDC Water Quality and Health

Coding & Billing References

  • •
    CDC Water Quality and Health

Frequently Asked Questions

How should Z58.6 be documented in patient records?

Document the patient's living conditions, any health issues related to water supply, and any preventive measures discussed during visits.