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.
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
Use Additional Code
Additional codes that should follow this code
7th Character Definitions
- A - initial encounter
- D - subsequent encounter
- S - sequela
Child Codes (6)
ICD-11 Equivalents(1)
ICD-11 Equivalents
View full mappingCorresponding ICD-11 codes from the WHO crosswalk mapping
Also Known As / Clinical Terms(1)
Frequently Asked Questions
What is the ICD-10 code for adverse effects, not elsewhere classified?
The ICD-10-CM code for adverse effects, not elsewhere classified is T78. The full clinical description is "Adverse effects, not elsewhere classified". T78 is a non-billable header code. Use a more specific child code for billing purposes.
What does ICD-10 code T78 mean?
ICD-10-CM code T78 represents “Adverse effects, not elsewhere classified”. It is classified under Chapter 19: Injury, Poisoning and Certain Other Consequences of External Causes and 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, also report: 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.
How does T78 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like adverse effects, not elsewhere classified affect a person's functioning — body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.
What is the ICD-11 equivalent of T78?
T78 maps to the ICD-11 code: NF0Z (Unspecified effects of external causes).
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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.