X30.XXXA ICD-10-CM Code: Exposure to excessive natural heat, initial encounter
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Code Set: Valid FY2026 and FY2027. FY2026 took effect October 1, 2025.
Official Registry Overview & Definition
Exposure to excessive natural heat, initial encounter is a billable ICD-10-CM diagnosis code (X30A).
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for X30.XXXA in the official ICD-10-CM tabular list.
Inclusion Terms
Alternative terms the tabular list files under this code.
- Exposure to excessive heat as the cause of sunstroke
- Exposure to heat NOS
Excludes1 — Not Coded Here
Conditions that can never be reported with this code; the two are mutually exclusive.
- excessive heat of man-made origin (W92)
- exposure to man-made radiation (W89)
- exposure to sunlight (X32)
- exposure to tanning bed (W89)
Frequently Asked Questions (FAQ) & Clinical Guidance
Does X30.XXXA require a 7th character?
Yes. The appropriate 7th character is to be added to code X30.
Nearest Codes in This Family
Official ICD-10-CM classifications closest to X30.XXXA in its code family, with their registry titles.