T61.11 – Scombroid fish poisoning, accidental (unintentional)

ICD-10-CM 2027 diagnosis code · Toxic effects of substances chiefly nonmedicinal as to source

Non-billable header

ICD-10-CM code T61.11

Code: T61.11 (claims format: T6111)
Description: Scombroid fish poisoning, accidental (unintentional)
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 19. Injury, poisoning and certain other consequences of external causes (S00-T88)
Block: T51-T65 Toxic effects of substances chiefly nonmedicinal as to source
Parent codes: T61 › T61.1

Billable codes under T61.11

T61.11 is a header code and cannot be used on claims. Choose the most specific code:

7th character values

Codes in this category need a 7th character to describe the encounter or episode of care (use placeholder X for empty positions).

Character	Meaning
`A`	initial encounter
`D`	subsequent encounter
`S`	sequela

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

T61 – Toxic effect of noxious substances eaten as seafood

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-)

7th character note:

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

T61.1 – Scombroid fish poisoning

Applicable to:

Histamine-like syndrome

Block T51-T65

Excludes1 (not coded here):

contact with and (suspected) exposure to toxic substances (Z77.-)

Use additional code:

code(s):
for all associated manifestations of toxic effect, such as: respiratory conditions due to external agents (J60-J70)
personal history of foreign body fully removed (Z87.821)
to identify any retained foreign body, if applicable (Z18.-)

Notes:

When no intent is indicated code to accidental. Undetermined intent is only for use when there is specific documentation in the record that the intent of the toxic effect cannot be determined.

Related codes in T61.1

Frequently asked questions

What is ICD-10 code T61.11?

T61.11 is the ICD-10-CM code for scombroid fish poisoning, accidental (unintentional), in the block T51-T65 (Toxic effects of substances chiefly nonmedicinal as to source).

Is T61.11 a billable code?

No. T61.11 is a header code with more specific child codes; report one of the billable codes listed above.

What category does T61.11 belong to?

It belongs to category T61 – Toxic effect of noxious substances eaten as seafood.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.