T65.82 Toxic effect of harmful algae and algae toxins

The ICD-10-CM code for Toxic effect of harmful algae and algae toxins is T65.82 (FY2026). It is a non-billable category code — select a more specific code below for claims.

Classification

Chapter

19: Injury, poisoning and certain other consequences of external causes (S00-T88)

Section

T51-T65: Toxic effects of substances chiefly nonmedicinal as to source (T51-T65)

Category T65

84 codes (60 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to T65.82:

• Red tide
• Poisoning (acute) › algae and toxins

Inclusion Terms

• Toxic effect of (harmful) algae bloom NOS
• Toxic effect of blue-green algae bloom
• Toxic effect of brown tide
• Toxic effect of cyanobacteria bloom
• Toxic effect of Florida red tide
• Toxic effect of pfiesteria piscicida
• Toxic effect of red tide

Official Coding Guidelines

Sequence blood vessel/nerve injury first (fragment)

injury is to the blood vessels or nerves, that injury should be sequenced first.

Do not assign injury codes for iatrogenic injuries; code complication

3) Iatrogenic injuries Injury codes from Chapter 19 should not be assigned for injuries that occur during, or as a result of, a medical intervention. Assign the appropriate complication code(s).

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool

Cite This Page

Reference T65.82 with the canonical source and edition:

T65.82 — Toxic effect of harmful algae and algae toxins. ICD-10 Coding Pro (ICD-10-CM FY2026). https://icd10codingpro.com/codes/T65.82

Canonical URL: https://icd10codingpro.com/codes/T65.82