U.S. ICD-10-CM · FY 2027

T66-T78 ICD-10-CM Codes: Other and unspecified effects of external causes

Browse the official section hierarchy and 660 code records in Vero’s FY 2027 U.S. ICD-10-CM reference dataset.

Official classification

About this section

T66-T78

Other and unspecified effects of external causes

Chapter 19 · Injury, poisoning and certain other consequences of external causes (S00-T88)

Category index

Categories in T66-T78

Open a category to browse its progressively more specific child codes. This hierarchy gives you access to all 660 records in the section.

Transparency

Source and release

Data release

U.S. ICD-10-CM · FY 2027

Effective date

Oct 1, 2026

This section reference is generated from Vero’s repository-backed ICD-10-CM section, description, and hierarchy datasets. The visible range, record count, links, FAQs, and structured data share those sources.

Review the CDC/NCHS ICD-10-CM source

Section guidance

Frequently asked questions

What does the ICD-10-CM range T66-T78 include?

T66-T78 is the FY 2027 U.S. ICD-10-CM section for “Other and unspecified effects of external causes.” This page lists 660 records from Vero’s repository-backed dataset.

Which ICD-10-CM chapter contains T66-T78?

T66-T78 is listed in Chapter 19, Injury, poisoning and certain other consequences of external causes (S00-T88).

How many ICD-10-CM records are listed in T66-T78?

Vero’s FY 2027 reference dataset contains 660 records in T66-T78. Use the individual code pages to review descriptions, hierarchy, and coding notes.

Is T66-T78 itself a billable ICD-10-CM code?

T66-T78 is a section range, not a billable diagnosis code. Select the most specific code supported by the documentation and confirm the active code set and payer requirements.

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