T59.4
Toxic effect of chlorine gas
Not billable — category only FY2026 2025-10-01 → 2026-09-30
Exclusions 3 never code together
Excludes1 — never code together. The excluded condition and this one are mutually exclusive.
Excludes2 — not included here, but the patient may have both. Code both when documented.
7th character 3
A initial encounter
D subsequent encounter
S sequela
Instructional notes 4
T59code
Includes
- aerosol propellants
S00-T88chapter
Notes
- Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code
- The chapter uses the S-section for coding different types of injuries related to single body regions and the T-section to cover injuries to unspecified body regions as well as poisoning and certain other consequences of external causes.
Use additional code
- code to identify any retained foreign body, if applicable (Z18.-)Z18.-
Index entries leading here filed at null
No alphabetic index entry points at this code.
Alongside this code 9 same parent — T59
T59.0 Toxic effect of nitrogen oxides category T59.1 Toxic effect of sulfur dioxide category T59.2 Toxic effect of formaldehyde category T59.3 Toxic effect of lacrimogenic gas category T59.5 Toxic effect of fluorine gas and hydrogen fluoride category T59.6 Toxic effect of hydrogen sulfide category T59.7 Toxic effect of carbon dioxide category T59.8 Toxic effect of other specified gases, fumes and vapors category T59.9 Toxic effect of unspecified gases, fumes and vapors category
Subordinate codes 1
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.