T78.19
Other adverse food reactions, not elsewhere classified
Not billable — category only FY2026 2025-10-01 → 2026-09-30
FY2026–2027 only
Exclusions 12 never code together
T78.1code
Excludes1
Excludes2
- allergic and dietetic gastroenteritis and colitis (K52.29)K52.29
- allergic rhinitis due to food (J30.5)J30.5
- dermatitis due to food in contact with skin (L23.6, L24.6, L25.4)L23.6L24.6L25.4
- dermatitis due to ingested food (L27.2)L27.2
- food protein-induced enterocolitis syndrome (K52.21)K52.21
- food protein-induced enteropathy (K52.22)K52.22
Excludes1 — never code together. The excluded condition and this one are mutually exclusive.
Excludes2 — not included here, but the patient may have both. Code both when documented.
7th character 3
A initial encounter
D subsequent encounter
S sequela
Instructional notes 4
T78.1code
Use additional code
- code to identify the type of reaction, if applicable
S00-T88chapter
Notes
- Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code
- The chapter uses the S-section for coding different types of injuries related to single body regions and the T-section to cover injuries to unspecified body regions as well as poisoning and certain other consequences of external causes.
Use additional code
- code to identify any retained foreign body, if applicable (Z18.-)Z18.-
Index entries leading here 4
Alongside this code 2 same parent — T78.1
Medications 1
MED-RT files conditions by MeSH, which carves the world differently from ICD-10. These are name matches on this code's description, offered as candidates — not as an assertion that they are this code.
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.