X30.XXXS — Exposure to excessive natural heat, sequela
X30.XXXS is a billable, specific ICD-10-CM code for exposure to excessive natural heat, sequela. It is valid for submission on a claim.
7th character "S" — sequela
The appropriate 7th character is to be added to code X30
- A
- initial encounter
- D
- subsequent encounter
- S
- sequela
Excludes1 — never code together
These conditions cannot occur together. Billing both on the same encounter is a denial.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Exposure to excessive heat as the cause of sunstroke
- Exposure to heat NOS
Excludes1 inherited from the categories above X30.XXXS
These are not written on X30.XXXS, but they bind it: a note on a category applies to every code beneath it. Billing X30.XXXS with anything listed here is a denial.
Risk adjustment
X30.XXXS does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Code history
X30.XXXS has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.
Related codes at this level
Codes that share X30. If X30.XXXS is not quite right, the correct code is usually one of these.
Questions about X30.XXXS
- Is X30.XXXS a billable ICD-10-CM code?
- Yes. X30.XXXS is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does X30.XXXS sit in the tabular list?
- External causes of morbidity (V00-Y99), in the block Exposure to forces of nature (X30-X39).
- What cannot be coded together with X30.XXXS?
- X30.XXXS carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above X30.XXXS (X30) and apply to it just the same.