T78
Non-billableAdverse effects, not elsewhere classified
Adverse effects, not elsewhere classified
This is a header/category code. For billing purposes, use a more specific child code from the list below.
Status
Non-billable / Header
Block
T66-T78
Child Codes
6
Coding Notes
Excludes 1
Codes that cannot be used together with this code (mutual exclusion)
Excludes 2
Conditions not included here, but the patient may have both
- complications of surgical and medical care NEC (T80-T88)
Use Additional Code
Additional codes that should follow this code
- code to identify any retained foreign body, if applicable (Z18.-)
7th Character Definitions
- A - initial encounter
- D - subsequent encounter
- S - sequela
Child Codes (6)
Also Known As / Clinical Terms
Frequently Asked Questions
What is ICD-10 code T78?
ICD-10-CM code T78 represents "Adverse effects, not elsewhere classified". It is a non-billable header code — use a more specific child code for billing purposes.
Is T78 a billable code?
No, T78 is a non-billable header code. You need to use one of its more specific child codes for billing. There are 6 child codes under T78.
What chapter is T78 in?
T78 is in Chapter 19: Injury, Poisoning and Certain Other Consequences of External Causes (codes S00-T88).
What codes cannot be used with T78?
T78 has Excludes1 notes indicating codes that cannot be used together with it, including: birth trauma (P10-P15); obstetric trauma (O70-O71).
What are the subcategories under T78?
T78 has 6 child codes, including: T78.0 (Anaphylactic reaction due to food), T78.1 (Other adverse food reactions, not elsewhere classified), T78.2 (Anaphylactic shock, unspecified), T78.3 (Angioneurotic edema), and 2 more.
Are additional codes required with T78?
Yes, when using T78 you should also code: code to identify any retained foreign body, if applicable (Z18.-).
What are the UMLS CUIs for T78?
T78 is linked to 1 UMLS Concept Unique Identifier: C0869220. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
Automate ICD-10 Coding With AI
Send clinical text to the AutoICD API and get back structured ICD-10 codes with confidence scores. Integrates into any EHR or billing system in minutes.
Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.