| T78 | Adverse effects, not elsewhere classified | NON-BILLABLE CODE |
| T78.0 | Anaphylactic reaction due to food | NON-BILLABLE CODE |
| T78.00 | Anaphylactic reaction due to unspecified food | NON-BILLABLE CODE |
| T78.00XA | Anaphylactic reaction due to unspecified food, initial encounter | BILLABLE CODE |
| T78.00XD | Anaphylactic reaction due to unspecified food, subsequent encounter | BILLABLE CODE |
| T78.00XS | Anaphylactic reaction due to unspecified food, sequela | BILLABLE CODE |
| T78.01 | Anaphylactic reaction due to peanuts | NON-BILLABLE CODE |
| T78.01XA | Anaphylactic reaction due to peanuts, initial encounter | BILLABLE CODE |
| T78.01XD | Anaphylactic reaction due to peanuts, subsequent encounter | BILLABLE CODE |
| T78.01XS | Anaphylactic reaction due to peanuts, sequela | BILLABLE CODE |
| T78.02 | Anaphylactic reaction due to shellfish (crustaceans) | NON-BILLABLE CODE |
| T78.02XA | Anaphylactic reaction due to shellfish (crustaceans), initial encounter | BILLABLE CODE |
| T78.02XD | Anaphylactic reaction due to shellfish (crustaceans), subsequent encounter | BILLABLE CODE |
| T78.02XS | Anaphylactic reaction due to shellfish (crustaceans), sequela | BILLABLE CODE |
| T78.03 | Anaphylactic reaction due to other fish | NON-BILLABLE CODE |
| T78.03XA | Anaphylactic reaction due to other fish, initial encounter | BILLABLE CODE |
| T78.03XD | Anaphylactic reaction due to other fish, subsequent encounter | BILLABLE CODE |
| T78.03XS | Anaphylactic reaction due to other fish, sequela | BILLABLE CODE |
| T78.04 | Anaphylactic reaction due to fruits and vegetables | NON-BILLABLE CODE |
| T78.04XA | Anaphylactic reaction due to fruits and vegetables, initial encounter | BILLABLE CODE |
| T78.04XD | Anaphylactic reaction due to fruits and vegetables, subsequent encounter | BILLABLE CODE |
| T78.04XS | Anaphylactic reaction due to fruits and vegetables, sequela | BILLABLE CODE |
| T78.05 | Anaphylactic reaction due to tree nuts and seeds | NON-BILLABLE CODE |
| T78.05XA | Anaphylactic reaction due to tree nuts and seeds, initial encounter | BILLABLE CODE |
| T78.05XD | Anaphylactic reaction due to tree nuts and seeds, subsequent encounter | BILLABLE CODE |
| T78.05XS | Anaphylactic reaction due to tree nuts and seeds, sequela | BILLABLE CODE |
| T78.06 | Anaphylactic reaction due to food additives | NON-BILLABLE CODE |
| T78.06XA | Anaphylactic reaction due to food additives, initial encounter | BILLABLE CODE |
| T78.06XD | Anaphylactic reaction due to food additives, subsequent encounter | BILLABLE CODE |
| T78.06XS | Anaphylactic reaction due to food additives, sequela | BILLABLE CODE |
| T78.07 | Anaphylactic reaction due to milk and dairy products | NON-BILLABLE CODE |
| T78.07XA | Anaphylactic reaction due to milk and dairy products, initial encounter | BILLABLE CODE |
| T78.07XD | Anaphylactic reaction due to milk and dairy products, subsequent encounter | BILLABLE CODE |
| T78.07XS | Anaphylactic reaction due to milk and dairy products, sequela | BILLABLE CODE |
| T78.08 | Anaphylactic reaction due to eggs | NON-BILLABLE CODE |
| T78.08XD | Anaphylactic reaction due to eggs, subsequent encounter | BILLABLE CODE |
| T78.08XS | Anaphylactic reaction due to eggs, sequela | BILLABLE CODE |
| T78.09 | Anaphylactic reaction due to other food products | NON-BILLABLE CODE |
| T78.09XA | Anaphylactic reaction due to other food products, initial encounter | BILLABLE CODE |
| T78.09XD | Anaphylactic reaction due to other food products, subsequent encounter | BILLABLE CODE |
| T78.09XS | Anaphylactic reaction due to other food products, sequela | BILLABLE CODE |
| T78.1 | Other adverse food reactions, not elsewhere classified | NON-BILLABLE CODE |
| T78.1XXA | Other adverse food reactions, not elsewhere classified, initial encounter | BILLABLE CODE |
| T78.1XXD | Other adverse food reactions, not elsewhere classified, subsequent encounter | BILLABLE CODE |
| T78.1XXS | Other adverse food reactions, not elsewhere classified, sequela | BILLABLE CODE |
| T78.2 | Anaphylactic shock, unspecified | NON-BILLABLE CODE |
| T78.2XXA | Anaphylactic shock, unspecified, initial encounter | BILLABLE CODE |
| T78.2XXD | Anaphylactic shock, unspecified, subsequent encounter | BILLABLE CODE |
| T78.2XXS | Anaphylactic shock, unspecified, sequela | BILLABLE CODE |
| T78.3 | Angioneurotic edema | NON-BILLABLE CODE |
| T78.3XXA | Angioneurotic edema, initial encounter | BILLABLE CODE |
| T78.3XXD | Angioneurotic edema, subsequent encounter | BILLABLE CODE |
| T78.3XXS | Angioneurotic edema, sequela | BILLABLE CODE |
| T78.4 | Other and unspecified allergy | NON-BILLABLE CODE |
| T78.40 | Allergy, unspecified | NON-BILLABLE CODE |
| T78.40XA | Allergy, unspecified, initial encounter | BILLABLE CODE |
| T78.40XD | Allergy, unspecified, subsequent encounter | BILLABLE CODE |
| T78.40XS | Allergy, unspecified, sequela | BILLABLE CODE |
| T78.41 | Arthus phenomenon | NON-BILLABLE CODE |
| T78.41XA | Arthus phenomenon, initial encounter | BILLABLE CODE |
| T78.41XD | Arthus phenomenon, subsequent encounter | BILLABLE CODE |
| T78.41XS | Arthus phenomenon, sequela | BILLABLE CODE |
| T78.49 | Other allergy | NON-BILLABLE CODE |
| T78.49XA | Other allergy, initial encounter | BILLABLE CODE |
| T78.49XD | Other allergy, subsequent encounter | BILLABLE CODE |
| T78.49XS | Other allergy, sequela | BILLABLE CODE |
| T78.8 | Other adverse effects, not elsewhere classified | NON-BILLABLE CODE |
| T78.8XXA | Other adverse effects, not elsewhere classified, initial encounter | BILLABLE CODE |
| T78.8XXD | Other adverse effects, not elsewhere classified, subsequent encounter | BILLABLE CODE |
| T78.8XXS | Other adverse effects, not elsewhere classified, sequela | BILLABLE CODE |
