U.S. ICD-10-CM · FY 2027

X30 ICD-10-CM Code: Exposure to excessive natural heat

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

Code definition

Official description

X30

Exposure to excessive natural heat

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

Classification

Where X30 sits

  1. 1

    Chapter 20

    External causes of morbidity (V00-Y99)

  2. 2

    Section

    Accidents (V00-X58)

  3. 3

    Category X30

    Exposure to excessive natural heat

  4. 4

    Code X30

    Exposure to excessive natural heat

More specific choices

Codes under X30

X30 is a non-billable category. Choose the child code that best matches the documented diagnosis.

Documentation details

Notes for this code

Inclusion terms

  • Exposure to excessive heat as the cause of sunstroke
  • Exposure to heat NOS

Code first

No “code first” instruction is listed for X30.

Use additional code

No “use additional code” instruction is listed for X30.

Excludes1

Conditions that should not be reported together with this code.

  • excessive heat of man-made origin (W92)
  • exposure to man-made radiation (W89)
  • exposure to sunlight (X32)
  • exposure to tanning bed (W89)

Excludes2

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

No Excludes2 note is listed for X30.

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 X30 mean?

X30 is the FY 2027 U.S. ICD-10-CM code for “Exposure to excessive natural heat.”

Is X30 a billable or specific ICD-10-CM code?

No. X30 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.

Where is X30 located in ICD-10-CM?

X30 is listed in Chapter 20, External causes of morbidity (V00-Y99), within Accidents (V00-X58) (V00–X58), under category X30, Exposure to excessive natural heat.

What coding notes are listed for X30?

Its listed inclusion terms are Exposure to excessive heat as the cause of sunstroke; Exposure to heat NOS. No code-first instruction is listed. Excludes1 notes: excessive heat of man-made origin (W92); exposure to man-made radiation (W89); exposure to sunlight (X32); exposure to tanning bed (W89). No Excludes2 note is listed.

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