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ICD-10-CM 2027

ICD-10 code for shellfish poisoning

T61.78

Other shellfish poisoning

Header — needs a more specific code

From the official ICD-10-CM alphabetic index entry “Poisoning (acute) › shellfish (amnesic) (azaspiracid) (diarrheic) (neurotoxic) (noxious) (paralytic)”. Page updated September 29, 2026.

About coding shellfish poisoning

The ICD-10-CM code for shellfish poisoning is T61.78 (Other shellfish poisoning).

Within T61.7 (other fish and shellfish poisoning), T61.78 is specifically for other shellfish poisoning. Related codes cover fish poisoning (T61.77).

Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

More specific shellfish poisoning codes (official index)

  • bacterial
  • ciguatera mollusk

Common questions about shellfish poisoning ICD-10 codes

What is the ICD-10 code for shellfish poisoning?

T61.78 — Other shellfish poisoning (a header code; report a more specific subcode).

Is T61.78 billable?

No. T61.78 is a header code. Report one of its more specific subcodes instead.