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U.S. ICD-10-CM · FY 2027

T70.20XD ICD-10-CM Code: Unspecified effects of high altitude, subsequent 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

T70.20XD

Unspecified effects of high altitude, subsequent encounter

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

Classification

Where T70.20XD sits

  1. 1

    Chapter 19

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

  2. 2

    Section

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

  3. 3

    Category T70

    Effects of air pressure and water pressure

  4. 4

    Subcategory T70.20

    Unspecified effects of high altitude

  5. 5

    Code T70.20XD

    Unspecified effects of high altitude, subsequent encounter

Documentation details

Notes for this code

Inclusion terms

No inclusion terms are listed for T70.20XD.

Code first

No “code first” instruction is listed for T70.20XD.

Use additional code

No “use additional code” instruction is listed for T70.20XD.

Excludes1

Conditions that should not be reported together with this code.

No Excludes1 note is listed for T70.20XD.

Excludes2

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

No Excludes2 note is listed for T70.20XD.

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 T70.20XD mean?

T70.20XD is the FY 2027 U.S. ICD-10-CM code for “Unspecified effects of high altitude, subsequent encounter.”

Is T70.20XD a billable or specific ICD-10-CM code?

Yes. In the FY 2027 reference data used on this page, T70.20XD 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 T70.20XD located in ICD-10-CM?

T70.20XD is listed in Chapter 19, Injury, poisoning and certain other consequences of external causes (S00-T88), within Other and unspecified effects of external causes (T66-T78) (T66–T78), under category T70, Effects of air pressure and water pressure and subcategory T70.20, Unspecified effects of high altitude.

What coding notes are listed for T70.20XD?

No inclusion terms are listed for T70.20XD in this reference record. No code-first instruction is listed. No Excludes1 note is listed. No Excludes2 note is listed.

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