Exposure to electric current, radiation and extreme ambient air temperature and pressure (W85-W99) ICD-10-CM
The W85–W99 section covers exposure to electric current, radiation and extreme ambient air temperature and pressure with 143 ICD-10-CM diagnosis codes, of which 99 are billable in fiscal year 2027. The section is organized into the 9 code ranges listed below.
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.
Code Ranges in This Section 9 ranges · 143 codes
The info icon previews the code ranges inside each row and its instructional notations from the official Tabular List.
About the W85–W99 Code Range
These categories describe exposure to electric current, radiation, man-made light, excessive man-made heat or cold, and high, low, or changing air pressure.
Electric current separates transmission lines (W85) from other sources, including domestic and industrial wiring (W86). Radiation separates X-rays and radioactive isotopes (W88) from man-made visible or ultraviolet light (W89) and sources such as infrared and lasers (W90).
W92 addresses excessive man-made heat. W93 addresses excessive man-made cold and distinguishes sources such as dry ice and deep freeze units. W94 separates prolonged high or low air pressure from rapid pressure changes during ascent or descent. W99 addresses other man-made environmental factors.
Each category uses a seventh character for an initial encounter, subsequent encounter, or sequela, meaning later effects.
Questions About This Page
How many codes are in the W85-W99 range?
The W85-W99 range contains 143 ICD-10-CM diagnosis codes in FY 2027. 99 of them are billable, and the rest are category headers that organize the section.
What conditions does W85-W99 cover?
The range covers exposure to electric current, radiation and extreme ambient air temperature and pressure. The code ranges listed above break it into groups of related conditions, and each one links to its own page with the full code list.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
