T78.120S

Other adverse food reaction due to egg with tolerance to baked egg, sequela

Billable FY2026 2025-10-01 → 2026-09-30 FY2026–2027 only

Exclusions 12 never code together

T78.1code

Excludes1

anaphylactic reaction or shock due to adverse food reaction (T78.0-)T78.0-
anaphylactic reaction due to food (T78.0-)T78.0-
bacterial food borne intoxications (A05.-)A05.-

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)L23.6 L24.6 L25.4
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

T78code

Excludes2

complications of surgical and medical care NEC (T80-T88)T80-T88

S00-T88chapter

Excludes2

birth trauma (P10-P15)P10-P15
obstetric trauma (O70-O71)O70-O71

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 this code

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 1 filed at T78.120

The index files this at T78.120. The tabular extends it — laterality, staging, or the 7th character — so these entries lead to the family rather than to T78.120S exactly.

Allergy, allergic (reaction) (to) T78.40
- eggs
  - adverse reaction NEC T78.129
    - with
      - tolerance to baked egg T78.120

Alongside this code 2 same parent — T78.120

T78.120A Other ad food react d/t egg with tolerance to bkd egg, init T78.120D Other ad food react d/t egg with tolerance to bkd egg, subs

Additional references

AHA Coding Clinic® Licence required

Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.

Risk adjustment

Maps to no condition category in any loaded model.

Presence is a property of the code. Untick a model to hide it everywhere.

This code

Billable: yes
Code set: FY2026
Parent: T78.120
Block: T07-T88
Siblings: 2

Present FY2026–FY2027.