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U.S. ICD-10-CM · FY 2027

S25.399A ICD-10-CM Code: Other specified injury of unspecified innominate or subclavian vein, initial encounter

A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.

Code definition

Official description

S25.399A

Other specified injury of unspecified innominate or subclavian vein, initial encounter

ICD-10-CM diagnosis code · United States clinical modification

Classification

Where S25.399A sits

  1. 1

    Chapter 19

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

  2. 2

    Section

    Injuries to the thorax (S20-S29)

  3. 3

    Category S25

    Injury of blood vessels of thorax

  4. 4

    Subcategory S25.399

    Other specified injury of unspecified innominate or subclavian vein

  5. 5

    Code S25.399A

    Other specified injury of unspecified innominate or subclavian vein, initial encounter

Documentation details

Notes for this code

Inclusion terms

No inclusion terms are listed for S25.399A.

Code first

No “code first” instruction is listed for S25.399A.

Use additional code

No “use additional code” instruction is listed for S25.399A.

Excludes1

Conditions that should not be reported together with this code.

No Excludes1 note is listed for S25.399A.

Excludes2

Conditions not included here that may be reported separately when present.

No Excludes2 note is listed for S25.399A.

Transparency

Source and release

Data release

U.S. ICD-10-CM · FY 2027

Effective date

Oct 1, 2026

This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.

Review the CDC/NCHS ICD-10-CM source

Code-specific guidance

Frequently asked questions

What does ICD-10-CM code S25.399A mean?

S25.399A is the FY 2027 U.S. ICD-10-CM code for “Other specified injury of unspecified innominate or subclavian vein, initial encounter.”

Is S25.399A a billable or specific ICD-10-CM code?

Yes. In the FY 2027 reference data used on this page, S25.399A has no child codes and is presented as a billable/specific code. Always confirm the active code set and payer requirements before use.

Where is S25.399A located in ICD-10-CM?

S25.399A is listed in Chapter 19, Injury, poisoning and certain other consequences of external causes (S00-T88), within Injuries to the thorax (S20-S29) (S20–S29), under category S25, Injury of blood vessels of thorax and subcategory S25.399, Other specified injury of unspecified innominate or subclavian vein.

What coding notes are listed for S25.399A?

No inclusion terms are listed for S25.399A in this reference record. No code-first instruction is listed. No Excludes1 note is listed. No Excludes2 note is listed.

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