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2. ICD-10 Codes
3. Chapter - Z00-Z99
4. Section - Z77-Z99
5. Category - Z77
6. Z77.121

Z77.121 - Contact with and (suspected) exposure to harmful algae and algae toxins

• Applicable to Contact with and (suspected) exposure to harmful algae and algae toxins
• The 2025 edition of ICD10-CM Z77.121 became effective on October 1, 2024.
• This is the American ICD10-CM version of Z77.121 - other international versions of ICD10 Z77.121 may differ.
• Z77.121 is a Billable / Specific ICD10-CM code that can be used to indicate a diagnosis for reimbursement purposes.

• Contact with and (suspected) exposure to (harmful) algae bloom NOS
• Contact with and (suspected) exposure to blue-green algae bloom
• Contact with and (suspected) exposure to brown tide
• Contact with and (suspected) exposure to cyanobacteria bloom
• Contact with and (suspected) exposure to Florida red tide
• Contact with and (suspected) exposure to pfiesteria piscicida
• Contact with and (suspected) exposure to red tide

The following codes above Z77.121 contain annotation back-references that may be applicable to Z77.121:

• Chapter: Z00-Z99 - Factors influencing health status and contact with health services
• Section: Z77-Z99 - Persons with potential health hazards related to family and personal history and certain conditions influencing health status
• Category: Z77 - Other contact with and (suspected) exposures hazardous to health

Browse other similar CM codes:

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.