ICD-10 X30
Non-Billable HeaderExposure to excessive natural heat
About ICD-10-CM X30
ICD-10-CM code X30 represents Exposure to excessive natural heat. This is a non-billable header code in the External Causes of Morbidity chapter (block X30). The 2026 edition of ICD-10-CM X30 became effective on October 1, 2025. Non-billable codes cannot be used as a primary or secondary diagnosis on a claim, use a more specific child code instead.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under X30. Per CMS ICD-10-CM Tabular 2026.
- Exposure to excessive heat as the cause of sunstroke
- Exposure to heat NOS
Type 1 Excludes
Pure excludes, these codes can never be coded together with X30. The conditions are mutually exclusive (e.g., congenital vs acquired forms).
- excessive heat of man-made origin (W92)
- exposure to man-made radiation (W89)
- exposure to sunlight (X32)
- exposure to tanning bed (W89)
Coding Notes
Seven Chr Note
- The appropriate 7th character is to be added to code X30
Medicare LCD Coverage for X30
Local Coverage Determinations (LCDs) from CMS MACs that list X30 as a covered diagnosis.
This doesn't mean the code isn't covered, it means no MAC has issued a Local Coverage Determination naming this specific code. Coverage may still apply under National Coverage Determinations or general medical-necessity rules.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing X30.
Our payer policy database covers Aetna, Cigna, Anthem, BCBS, Humana, and Medicare Advantage plans, but X30 doesn't currently appear in any indexed policy. The code may still be covered under standard plan benefits.
CPT Codes Commonly Billed with X30
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
We don't have CPT pairings indexed for this specific code yet. Use the CPT search above to find common procedures, or check your payer's published medical policy for code-specific guidance.
Codes Adjacent To X30
Other codes in section X30-X39 (Exposure to forces of nature).
ICD-10 X30, Billing FAQ
Is ICD-10 code X30 billable? +
No, X30 is a non-billable header code. Use a more specific child code from block X30 when submitting claims.
What other names or terms map to X30? +
ICD-10 X30 includes: Exposure to excessive heat as the cause of sunstroke; Exposure to heat NOS.
What codes are Type 1 Excludes for X30? +
Type 1 Excludes (never code together with X30): excessive heat of man-made origin (W92); exposure to man-made radiation (W89); exposure to sunlight (X32)
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on June 1, 2026.
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