Z77.121
BillableContact with and (suspected) exposure to harmful algae and algae toxins
Z77.121 is the ICD-10-CM code for Contact with and (suspected) exposure to harmful algae and algae toxins. It is a billable, specific code valid for reimbursement.
Z00-Z99 Factors influencing health status and contact with health services
What this means — in plain language
MedlinePlus · NIHWe all need clean water. People need it to grow crops and to operate factories, and for drinking and recreation. Fish and wildlife depend on it to survive. Many different pollutants can harm our rivers, streams, lakes, and oceans. The three most common are soil, nutrients, and bacteria. Rain washes soil into streams and rivers. The soil can kill tiny animals and fish eggs. It can clog the gills of fish and block…
Read more about Water Pollution at MedlinePlus ↗Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.
Includes
- •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
Medications indicated for this condition
FDA labelingDrugs whose FDA labeling lists this condition's category among its indications. Informational only — not a treatment recommendation or medical advice.
Conditions mapped to this code
MedlinePlus · NIHPlain-language health-topic references grounded in MedlinePlus (NIH/NLM).
Frequently asked questions
- What is ICD-10 code Z77.121?
- Z77.121 is the ICD-10-CM code for "Contact with and (suspected) exposure to harmful algae and algae toxins". It falls under Z00-Z99 Factors influencing health status and contact with health services.
- Is Z77.121 a billable code?
- Yes — Z77.121 is a billable, specific ICD-10-CM code valid for reimbursement.
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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