T78.40XD

Billable

ChapterS00–T88

Ranksubcategory

Official Description

Allergy, unspecified, subsequent encounter

Metadata & Insights

•Billable/specific code (valid for reimbursement).
•Chapter 19: Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88).

General instructions are available for the parent sections:

BillableHas subcodes

CH19Injury, poisoning and certain other consequences of external causes (S00-T88)

T66-T78Other and unspecified effects of external causes (T66-T78)

T78Adverse effects, not elsewhere classified

T78.4Other and unspecified allergy

T78.40Allergy, unspecified

T78.40XDAllergy, unspecified, subsequent encounterBillable

The following parent sections contain instructions or notes that apply to T78.40XD:

subcategoryT78.40

Allergy, unspecified

subcategoryT78.4

Other and unspecified allergy

categoryT78

Adverse effects, not elsewhere classified

Other and unspecified effects of external causes (T66-T78)

chapterCH19

Injury, poisoning and certain other consequences of external causes (S00-T88)

2026 v43.1

This code is grouped within the following Diagnosis Related Group(s) for clinical reimbursement:

Find surgical and procedural codes related to Allergy, unspecified, subsequent encounter.