ICD-10-CM Diagnosis Code T78.4

The appropriate 7th character is to be added to each code from category T78

code to identify any retained foreign body, if applicable (Z18.-)

specified types of allergic reaction such as:

allergic diarrhea (K52.29)

allergic gastroenteritis and colitis (K52.29)

dermatitis (L23-L25, L27.-)

food protein-induced enterocolitis syndrome (K52.21)

food protein-induced enteropathy (K52.22)

hay fever (J30.1)

birth trauma (P10-P15)

obstetric trauma (O70-O71)

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

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.