Z58.6 Inadequate drinking-water supply

Billable ICD-10-CM code, FY2026. Exempt from present-on-admission (POA) reporting.

Applicable to

• Lack of safe drinking water

Excludes2 (not included here)

• deprivation of water (T73.1)

Applies from Z58 Problems related to physical environment

Excludes2 (not included here)

• occupational exposure (Z57.-)

MS-DRG index

Defines the logic of DRG(s) 951 in MDC 23.

Medicare Code Edits (MCE v43.1 (April 2026))

• Unacceptable principal diagnosis: These codes describe a circumstance which influences care but is not a current illness or injury, or capture only an underlying condition, and are unacceptable as principal diagnosis.

Code annotations containing back-references to Z58.6

Back-references to Z58

• Type 2 Excludes: Z72 Problems related to lifestyle ("problems related to socioeconomic and psychosocial circumstances (Z55-Z65)")
• Type 2 Excludes: Z73 Problems related to life management difficulty ("problems related to socioeconomic and psychosocial circumstances (Z55-Z65)")

Diagnosis Index entries for Z58.6

• Inadequate, inadequacy › drinking-water supply
• Lack of › safe drinking water
• Lack of › water › safe drinking
• Water › lack of › safe drinking

Nearby codes

• Z58 Problems related to physical environment
• Z58.6 Inadequate drinking-water supply (this code)
• Z58.8 Other problems related to physical environment
• Z58.81 Basic services unavailable in physical environment
• Z58.89 Other problems related to physical environment