Z77.121 is a billable/specific and POA-exempt diagnosis code from the 2025 ICD-10-CM used to classify the following condition: Contact with and (suspected) exposure to harmful algae and algae toxins.
Inclusion term
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
Versions
2025
No changes
2024
No changes
2023
No changes
2022
No changes
2021
No changes
2020
No changes
2019
No changes
2018
No changes
2017
No changes
2016
New code