T78.02 — Anaphylactic reaction due to shellfish (crustaceans)
T78.02 is a non-billable header ICD-10-CM code for anaphylactic reaction due to shellfish (crustaceans). It cannot be billed on its own: choose one of the more specific child codes below. This code also requires a 7th character before it is complete.
This code requires a 7th character
The appropriate 7th character is to be added to each code from category T78
- A
- initial encounter
- D
- subsequent encounter
- S
- sequela
Risk adjustment
T78.02 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
How T78.02 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to T78.02.
- Shock›anaphylactic›due to food›fish›shellfish
Code to one of these instead T78.02
3 child codes. Green means billable.
Related codes at this level
Codes that share T78.0. If T78.02 is not quite right, the correct code is usually one of these.
- T78.00Anaphylactic reaction due to unspecified food
- T78.01Anaphylactic reaction due to peanuts
- T78.03Anaphylactic reaction due to other fish
- T78.04Anaphylactic reaction due to fruits and vegetables
- T78.05Anaphylactic reaction due to tree nuts and seeds
- T78.06Anaphylactic reaction due to food additives
- T78.07Anaphylactic reaction due to milk and dairy products
- T78.08Anaphylactic reaction due to eggs
- T78.09Anaphylactic reaction due to other food products
Questions about T78.02
- Is T78.02 a billable ICD-10-CM code?
- No. T78.02 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does T78.02 sit in the tabular list?
- Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Other and unspecified effects of external causes (T66-T78).