ICD-10-CM > S00-T88 > T66-T78 > T78 > T78.0 > T78.02 T78.02 Anaphylactic reaction due to shellfish (crustaceans) Non-Billable/Non-Specific Codes T78.02XA..., initial encounterT78.02XD..., subsequent encounterT78.02XS..., sequela