ICD-10-CM Billable Code

T65.821

Toxic effect of harmful algae and algae toxins, accidental (unintentional)

Clinical Classification Guidelines

Inclusion Terms

  • Toxic effect of harmful algae and algae toxins NOS

Medical Intelligence & Overview

ICD-10 Code T65.821 refers to the accidental intoxication caused by harmful algae and algae toxins. This condition occurs when individuals are exposed unintentionally to toxins produced by certain algae, leading to a range of health issues. Recognizing the causes, symptoms, and available treatments can help in understanding and managing such cases effectively.

Causes & Symptoms

Clinical Causes: Swimming or wading in waters contaminated with harmful algae blooms Ingesting contaminated seafood, such as shellfish or fish that have accumulated algae toxins Accidental inhalation of aerosolized toxins during recreational activities near affected water bodies Environmental exposure in areas with documented harmful algal blooms Occupational exposure for workers involved in harvesting or inspecting seafood from contaminated waters

Key Symptoms: Nausea and vomiting Diarrhea or abdominal pain Headache and dizziness Respiratory issues like coughing or shortness of breath Skin irritation or rashes upon contact Muscle weakness or fatigue In severe cases, neurological symptoms such as seizures or confusion

Diagnostic & Treatment

Diagnosis Path: Diagnosis involves reviewing exposure history—such as recent swimming, seafood consumption, or environmental contact—and clinical evaluation of symptoms. Laboratory tests may include:

Treatment Protocols: Management of algal toxin poisoning primarily focuses on symptom relief and supportive care. Specific treatments may include:

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

Clinical Advice & FAQs

Billing Guidance

Is T65.821 a billable ICD-10 code?
Yes, T65.821 is a specific, billable code that can be used to indicate a diagnosis for reimbursement purposes.

Documentation

How do I report T65.821?
Clinical documentation must specify the nature of Toxic effect of harmful algae and algae toxins, accidental (unintentional) and any associated comorbidities for accurate reporting.

Cite this Clinical Reference