T78.121D

Other adverse food reaction due to egg with reactivity to baked egg, subsequent encounter

Billable / specificPOA exempt

T78.121D is a billable, specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes in FY2027.

Inclusion terms

Includes (from T78)

  • Note: 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
  • Note: 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.

Excludes1

Not coded here — never report together with this code.

  • Other adverse food reaction due to egg with tolerance to baked egg (T78.120) (from T78.121)
  • anaphylactic reaction or shock due to adverse food reaction (T78.0-) (from T78.1)
  • anaphylactic reaction due to food (T78.0-) (from T78.1)
  • bacterial food borne intoxications (A05.-) (from T78.1)

Excludes2

Not included here — may be reported together when both conditions exist.

  • allergic and dietetic gastroenteritis and colitis (K52.29) (from T78.1)
  • allergic rhinitis due to food (J30.5) (from T78.1)
  • dermatitis due to food in contact with skin (L23.6, L24.6, L25.4) (from T78.1)
  • dermatitis due to ingested food (L27.2) (from T78.1)
  • food protein-induced enterocolitis syndrome (K52.21) (from T78.1)
  • food protein-induced enteropathy (K52.22) (from T78.1)
  • birth trauma (P10-P15) (from T78)
  • obstetric trauma (O70-O71) (from T78)
  • complications of surgical and medical care NEC (T80-T88) (from T78)

Use additional code

Add a code to identify the following, if applicable.

  • code to identify the type of reaction, if applicable (from T78.1)
  • code to identify any retained foreign body, if applicable (Z18.-) (from T78)

Code also

An additional code may be needed.

  • , if applicable, place of occurrence, such as: (from T78)
  • highway rest stop (Y92.523) (from T78)
  • school (private) (public) (state) as the place of occurrence of the external cause (Y92.21-) (from T78)
  • service areas as the place of occurrence of the external cause (Y92.52-) (from T78)
  • single-family non-institutional (private) house as the place of occurrence of the external cause (Y92.01-) (from T78)
  • transport vehicle as the place of occurrence of the external cause (Y92.81-) (from T78)

7th character

The 7th character values that apply to this code (defined at T78). Use the placeholder "X" for missing positions.

CharacterMeaning
Ainitial encounter
Dsubsequent encounter
Ssequela

Parent code

  • T78.121Other adverse food reaction due to egg with reactivity to baked eggNeeds 7th char

Related codes

  • T78.121AOther adverse food reaction due to egg with reactivity to baked egg, initial encounterBillable
  • T78.121SOther adverse food reaction due to egg with reactivity to baked egg, sequelaBillable

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