T61UpcomingCategory · further specificity required

Toxic effect of noxious substances eaten as seafood

Code-level instructions

A — initial encounter

D — subsequent encounter

S — sequela

Code-level instructions

Excludes 1

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-)

Chapters 19 · Inherited instructions

Use additional code

code to identify any retained foreign body, if applicable (Z18.-)

T51-T65 · Inherited instructions

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.-)

Excludes 1

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

Excludes 2 · 2

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

Excludes 2

birth trauma (P10-P15)
obstetric trauma (O70-O71)

More specific codes

T61.0Ciguatera fish poisoning T61.1Scombroid fish poisoning T61.7Other fish and shellfish poisoning T61.8Toxic effect of other seafood T61.9Toxic effect of unspecified seafood

Claims & coverage

When ICD-10-CM is required

For US diagnosis claims covered by HIPAA, ICD-10-CM is required from October 1, 2015.

Use the service date for outpatient/professional claims and the discharge date for hospital inpatient claims. Earlier encounters use ICD-9-CM; each individual code must also be valid for the applicable date.

Official coding guidelines → · CMS ↗

First observed · 2015-10-01

Code history

Latest recorded change · FY2025 · 04-01

ChangedUnchanged

FY2025 · 04-01

Effective from 2025-04-01

Inherited rules changed

Toxic effect of noxious substances eaten as seafood

Category — select a more specific code

CDC/NCHS · FY2025 · 04-01

All editions (19)

All editions	Effective from	Code history
FY2016	2015-10-01	First observed
FY2017	2016-10-01	Code-level rules changed
FY2018	2017-10-01	No tabular change
FY2019	2018-10-01	No tabular change
FY2020	2019-10-01	No tabular change
FY2020 · April	2020-04-01	No tabular change
FY2021	2020-10-01	No tabular change
FY2021 · 01-01	2021-01-01	No tabular change
FY2022	2021-10-01	No tabular change
FY2022 · 04-01	2022-04-01	No tabular change
FY2023	2022-10-01	No tabular change
FY2023 · 04-01	2023-04-01	No tabular change
FY2024	2023-10-01	No tabular change
FY2024 · 04-01	2024-04-01	No tabular change
FY2025	2024-10-01	No tabular change
FY2025 · 04-01	2025-04-01	Inherited rules changed
FY2026	2025-10-01	No tabular change
FY2026 · April	2026-04-01	No tabular change
FY2027	2026-10-01	No tabular change

Code-level instructions

Excludes 1

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-)

Seventh character

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

A — initial encounter

D — subsequent encounter

S — sequela

Inherited instructions

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

Excludes 2

birth trauma (P10-P15)
obstetric trauma (O70-O71)

Use additional code

code to identify any retained foreign body, if applicable (Z18.-)

Note

Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code
The chapter uses the S-section for coding different types of injuries related to single body regions and the T-section to cover injuries to unspecified body regions as well as poisoning and certain other consequences of external causes.

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

Excludes 1

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.-)

Note

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.

More specific codes

T61.0Ciguatera fish poisoningCategory · further specificity required T61.1Scombroid fish poisoningCategory · further specificity required T61.7Other fish and shellfish poisoningCategory · further specificity required T61.8Toxic effect of other seafoodCategory · further specificity required T61.9Toxic effect of unspecified seafoodCategory · further specificity required

Related codes

Official titles and instructions are preserved in their source language. Official sources ↗

References from other codes (3)

A05 · Other bacterial foodborne intoxications, not elsewhere classified

Excludes 1 · toxic effect of noxious foodstuffs (T61-T62)

T63 · Toxic effect of contact with venomous animals and plants

Excludes 2 · ingestion of toxic animal or plant (T61.-, T62.-)

T63.5 · Toxic effect of contact with venomous fish

Excludes 2 · poisoning by ingestion of fish (T61.-)

T61UpcomingCategory · further specificity required

Toxic effect of noxious substances eaten as seafood

Code-level instructions

A — initial encounter

D — subsequent encounter

S — sequela

Code-level instructions

Excludes 1

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-)

Chapters 19 · Inherited instructions

Use additional code

code to identify any retained foreign body, if applicable (Z18.-)

T51-T65 · Inherited instructions

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.-)

Excludes 1

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

Excludes 2 · 2

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

Excludes 2

birth trauma (P10-P15)
obstetric trauma (O70-O71)

More specific codes

T61.0Ciguatera fish poisoning T61.1Scombroid fish poisoning T61.7Other fish and shellfish poisoning T61.8Toxic effect of other seafood T61.9Toxic effect of unspecified seafood

Claims & coverage

When ICD-10-CM is required

For US diagnosis claims covered by HIPAA, ICD-10-CM is required from October 1, 2015.

Official coding guidelines → · CMS ↗

First observed · 2015-10-01

Code history

Latest recorded change · FY2025 · 04-01

ChangedUnchanged

FY2025 · 04-01

Effective from 2025-04-01

Inherited rules changed

Toxic effect of noxious substances eaten as seafood

Category — select a more specific code

CDC/NCHS · FY2025 · 04-01

All editions (19)

All editions	Effective from	Code history
FY2016	2015-10-01	First observed
FY2017	2016-10-01	Code-level rules changed
FY2018	2017-10-01	No tabular change
FY2019	2018-10-01	No tabular change
FY2020	2019-10-01	No tabular change
FY2020 · April	2020-04-01	No tabular change
FY2021	2020-10-01	No tabular change
FY2021 · 01-01	2021-01-01	No tabular change
FY2022	2021-10-01	No tabular change
FY2022 · 04-01	2022-04-01	No tabular change
FY2023	2022-10-01	No tabular change
FY2023 · 04-01	2023-04-01	No tabular change
FY2024	2023-10-01	No tabular change
FY2024 · 04-01	2024-04-01	No tabular change
FY2025	2024-10-01	No tabular change
FY2025 · 04-01	2025-04-01	Inherited rules changed
FY2026	2025-10-01	No tabular change
FY2026 · April	2026-04-01	No tabular change
FY2027	2026-10-01	No tabular change

Code-level instructions

Excludes 1

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-)

Seventh character

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

A — initial encounter

D — subsequent encounter

S — sequela

Inherited instructions

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

Excludes 2

birth trauma (P10-P15)
obstetric trauma (O70-O71)

Use additional code

code to identify any retained foreign body, if applicable (Z18.-)

Note

Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code
The chapter uses the S-section for coding different types of injuries related to single body regions and the T-section to cover injuries to unspecified body regions as well as poisoning and certain other consequences of external causes.

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

Excludes 1

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.-)

Note

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.

More specific codes

Related codes

Official titles and instructions are preserved in their source language. Official sources ↗

References from other codes (3)

A05 · Other bacterial foodborne intoxications, not elsewhere classified

Excludes 1 · toxic effect of noxious foodstuffs (T61-T62)

T63 · Toxic effect of contact with venomous animals and plants

Excludes 2 · ingestion of toxic animal or plant (T61.-, T62.-)

T63.5 · Toxic effect of contact with venomous fish

Excludes 2 · poisoning by ingestion of fish (T61.-)