T78.079 — Anaphylactic reaction due to milk and dairy products, unspecified
T78.079 is a non-billable header ICD-10-CM code for anaphylactic reaction due to milk and dairy products, unspecified. 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
Excludes2 inherited from the categories above T78.079
Also inherited, and the opposite of Excludes1: these conditions are not part of T78.079, but a patient can have both, so you may code both.
Other codes that can never be billed with T78.079
These codes carry an Excludes1 note pointing at T78.079. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading T78.079 alone.
- T75Other and unspecified effects of other external causes
Risk adjustment
T78.079 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 T78.079 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 T78.079.
- Allergy, allergic›dairy products›anaphylactic reaction
- Allergy, allergic›milk protein›anaphylactic reaction
- Shock›anaphylactic›due to food›dairy products
- Shock›anaphylactic›due to food›milk
Code history
T78.079 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.
Code to one of these instead T78.079
3 child codes. Green means billable.
Related codes at this level
Codes that share T78.07. If T78.079 is not quite right, the correct code is usually one of these.
Questions about T78.079
- Is T78.079 a billable ICD-10-CM code?
- No. T78.079 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does T78.079 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).