Exposure to excessive natural heat (X30)
The ICD-10 code X30 and its variants are used specifically to document cases of exposure to excessive natural heat. These codes help identify and classify health issues related to heat-related conditions caused by environmental heat stress.
The code X30 covers general exposure to excessive natural heat, while the extensions X30.XXXA, X30.XXXD, and X30.XXXS specify the stage of care: initial encounter, subsequent encounter, and sequela, respectively. Conditions often referred to using terms like heatwave, accident due to hot weather, heat-induced dermatosis, or simply exposure to heat fall under these codes. Using the ICD-10 code for exposure to excessive natural heat assists healthcare professionals in accurately recording heat-related illnesses or injuries caused by prolonged heat exposure, guiding treatment decisions and tracking public health trends related to heat emergencies.
External causes of morbidity and mortality (V01–Y99)
Exposure to forces of nature (X30-X39)
X30 Exposure to excessive natural heat
- X30.XXXA Exposure to excessive natural heat, initial encounter
- X30.XXXD Exposure to excessive natural heat, subsequent encounter
- X30.XXXS Exposure to excessive natural heat, sequela
Exposure to excessive natural heat (X30)
Instructional Notations
Inclusion Terms
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
- Exposure to excessive heat as the cause of sunstroke
- Exposure to heat NOS
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
- excessive heat of man-made origin W92
- exposure to man-made radiation W89
- exposure to sunlight X32
- exposure to tanning bed W89
7th Character Note
Certain ICD-10-CM categories have applicable 7th characters. The applicable 7th character is required for all codes within the category, or as the notes in the Tabular List instruct. The 7th character must always be the 7th character in the data field. If a code that requires a 7th character is not 6 characters, a placeholder X must be used to fill in the empty characters.
- The appropriate 7th character is to be added to code X30
7th Character
Indicates that a seventh character is to be assigned to codes in a subcategory.
- A - initial encounter
- D - subsequent encounter
- S - sequela
