T61

ICD-10Non-billable category

Toxic effect of noxious substances eaten as seafood

Official ICD-10-CM descriptor (FY2026)

Toxic effect of noxious substances eaten as seafood

T61 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.

Excludes1

Not coded here. An Excludes1 code should never be reported at the same time as the code above it.

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-)

7th character

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

Permitted 7th characters

A	initial encounter
D	subsequent encounter
S	sequela

More specific codes under T61

Where this code sits

Chapter: 19. Injury, poisoning and certain other consequences of external causes (S00-T88)
Block: Toxic effects of substances chiefly nonmedicinal as to source (T51-T65)

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Source

ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.