T65.824S
✓ BillableToxic effect of harmful algae and algae toxins, undetermined, sequela
Injury, poisoning and certain other consequences of external causes (S00-T88)
Clinical Description
ICD-10-CM code T65.824S represents toxic effect of harmful algae and algae toxins, undetermined, sequela. This code falls under the Injury, poisoning and certain other consequences of external causes (S00-T88) classification. It is a billable/specific code valid for HIPAA-covered transactions as of October 1, 2025 (FY2026). This code can be used to indicate a diagnosis for reimbursement purposes on insurance claims.
This is a 8-character code at the 7th level of specificity. This is the most specific code available in this subcategory.
Frequently Asked Questions
What is ICD-10 code T65.824S?
ICD-10-CM code T65.824S is "Toxic effect of harmful algae and algae toxins, undetermined, sequela". It belongs to the category: Injury, poisoning and certain other consequences of external causes (S00-T88).
Is T65.824S a billable ICD-10 code?
Yes, T65.824S is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
Related Codes in T65.824
Other codes in the same category that may be relevant for differential coding:
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Data Source
CMS ICD-10-CM 2026 Tabular List
Updated October 1, 2025 (FY2026)