ICD-10-CM T61: Toxic effect of noxious substances eaten as seafood

ICD-10-CM Diagnosis Code (2025)

Official Description for T61

Toxic effect of noxious substances eaten as seafood

Coding Notes & Guidelines for T61

Excludes1: Not Coded Here
  • allergic reaction to food, such as:
  • anaphylactic reaction or shock due to adverse food reaction (T78.0-)
  • bacterial foodborne intoxications (A05.-)
  • dermatitis (L23.6, L25.4, L27.2)
  • food protein-induced enterocolitis syndrome (K52.21)
  • food protein-induced enteropathy (K52.22)
  • gastroenteritis (noninfective) (K52.29)
  • toxic effect of aflatoxin and other mycotoxins (T64)
  • toxic effect of cyanides (T65.0-)
  • toxic effect of harmful algae bloom (T65.82-)
  • toxic effect of hydrogen cyanide (T57.3-)
  • toxic effect of mercury (T56.1-)
  • toxic effect of red tide (T65.82-)
Inclusion Terms

Histamine-like syndrome

7th Character Guidance

The appropriate 7th character is to be added to each code from category T61

7th Character Definitions
  • A: initial encounter
  • D: subsequent encounter
  • S: sequela

Child Codes (More Specific Codes for T61):

T61.0 - Ciguatera fish poisoning T61.01 - Ciguatera fish poisoning, accidental (unintentional) T61.02 - Ciguatera fish poisoning, intentional self-harm T61.03 - Ciguatera fish poisoning, assault T61.04 - Ciguatera fish poisoning, undetermined T61.1 - Scombroid fish poisoning T61.11 - Scombroid fish poisoning, accidental (unintentional) T61.12 - Scombroid fish poisoning, intentional self-harm T61.13 - Scombroid fish poisoning, assault T61.14 - Scombroid fish poisoning, undetermined T61.7 - Other fish and shellfish poisoning T61.77 - Other fish poisoning T61.771 - Other fish poisoning, accidental (unintentional) T61.772 - Other fish poisoning, intentional self-harm T61.773 - Other fish poisoning, assault T61.774 - Other fish poisoning, undetermined T61.78 - Other shellfish poisoning T61.781 - Other shellfish poisoning, accidental (unintentional) T61.782 - Other shellfish poisoning, intentional self-harm T61.783 - Other shellfish poisoning, assault T61.784 - Other shellfish poisoning, undetermined T61.8 - Toxic effect of other seafood T61.8X - Toxic effect of other seafood T61.8X1 - Toxic effect of other seafood, accidental (unintentional) T61.8X2 - Toxic effect of other seafood, intentional self-harm T61.8X3 - Toxic effect of other seafood, assault T61.8X4 - Toxic effect of other seafood, undetermined T61.9 - Toxic effect of unspecified seafood T61.91 - Toxic effect of unspecified seafood, accidental (unintentional) T61.92 - Toxic effect of unspecified seafood, intentional self-harm T61.93 - Toxic effect of unspecified seafood, assault T61.94 - Toxic effect of unspecified seafood, undetermined

About ICD-10-CM Code T61 (Toxic effect of noxious substances eaten as seafood)

ICD-10-CM code T61 is a billable or specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2025 edition of ICD-10-CM T61 became effective on October 1, 2024.

This page provides detailed information about T61 - Toxic effect of noxious substances eaten as seafood. It includes common terminology, coding guidelines such as "Includes," "Excludes1," and "Excludes2" notes, and information on required 7th characters. Utilizing this information correctly is essential for accurate medical coding and claims submission for conditions like Toxic effect of noxious substances eaten as seafood.