2027 ICD-10-CM Diagnosis Code T59.894SToxic effect of other specified gases, fumes and vapors, undetermined, sequela
T59.894S is a billable ICD-10-CM diagnosis code for toxic effect of other specified gases, fumes and vapors, undetermined, sequela. The 7th character S marks it as a sequela code, which reports a problem that remains after the original condition has resolved. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 922 through 923. The code is exempt from POA reporting. Coders also document this condition as injury undetermined whether accidentally or purposely inflicted, poisoning by gases in domestic use. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Poisoning/toxic effect/adverse effects/underdosing, sequela.
Code Identity
Code Classification
Present on Admission (POA)Billing
T59.894S is exempt from POA reporting on inpatient claims to general acute care hospitals. Review the other POA exempt codes in Toxic effects of substances chiefly nonmedicinal as to source (T51-T65).
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Injury undetermined whether accidentally or purposely inflicted, poisoning by gases in domestic use
- Injury undetermined whether accidentally or purposely inflicted, poisoning by liquefied petroleum gas distributed in mobile containers
Coding GuidelinesGuidance
The appropriate 7th character is to be added to each code from block Toxic effect of other gases, fumes and vapors (T59). Use the following options for the applicable episode of care:
- A - initial encounter
- D - subsequent encounter
- S - sequela
Source: ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, published by CMS and the National Center for Health Statistics.
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to T59.894S: its own notes plus those printed at T59, block T51-T65, and Chapter 19. A note printed at a category, block or chapter applies to every code under it.
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
- chlorofluorocarbons (T53.5)
- contact with and (suspected) exposure to toxic substances (Z77.-)
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
Use Additional Code
Add a second code, after this one, to fully describe the condition.
- code to identify any retained foreign body, if applicable (Z18.-)
Notes
General instructions on how these codes are used.
- When no intent is indicated code to accidental. Undetermined intent is only for use when there is specific documentation in the record that the intent of the toxic effect cannot be determined.
- 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.
7th Character
Every code in the category takes a 7th character from the listed values, with the placeholder X filling any empty positions before it.
- The appropriate 7th character is to be added to each code from category T59
- Ainitial encounter
- Dsubsequent encounter
- Ssequela this code
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name T59.894S, its category, or a range that includes it.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Table of Drugs and ChemicalsClinical
Substances in the Table of Drugs and Chemicals that reference this code family. Always confirm in the Tabular List before coding.
| Substance | Accidental | Self-harm | Assault | Undetermined | Adverse Effect | Underdosing |
|---|---|---|---|---|---|---|
| Acetylene (gas) | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Acetylene (gas)::industrial | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Acridine::vapor | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Acrolein (gas) | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Alcohol::vapor (from any type of Alcohol) | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Ammonia (fumes) (gas) (vapor) | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Ammonium::compounds (household) NEC::fumes (any usage) | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Amyl::acetate::vapor | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Anticholinesterase::organophosphorus::nerve gas | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Boron::trifluoride | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Brake fluid vapor | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Bromine::vapor | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Butane (distributed in mobile container) | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Butane (distributed in mobile container)::distributed through pipes | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Cholinergic (drug) NEC::organophosphorus::nerve gas | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Coal (carbon monoxide from) [See Also: Carbon, monoxide, coal]::tar::fumes | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Combustion gas (after combustion) [See: Carbon, monoxide]::prior to combustion | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Cordite::vapor | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Cyanic acid (gas) | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Cyanogen (chloride) (gas) NEC | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Decaborane::fumes | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Diazomethane (gas) | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Diborane (gas) | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Dichloroethyl sulfide, not in war | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Dichloroformoxine, not in war | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Dimethyl::sulfate (fumes) | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Dinitrobenzene::vapor | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Dinitrobenzol::vapor | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Domestic gas (after combustion) [See: Gas, utility]::prior to combustion | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Dynamite::fumes | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Ethidium chloride (vapor) | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Ethyl::aldehyde (vapor) | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Ethylene (gas) | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Ethylene (gas)::oxide (fumigant) (nonmedicinal) | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Ferrovanadium (fumes) | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Firedamp | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Formic acid::vapor | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Fuel::gas (domestic use) [See Also: Carbon, monoxide, fuel, utility] | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Fuel::gas (domestic use) [See Also: Carbon, monoxide, fuel, utility]::utility | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Fuel::gas (domestic use) [See Also: Carbon, monoxide, fuel, utility]::utility::in mobile container | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Fuel::gas (domestic use) [See Also: Carbon, monoxide, fuel, utility]::utility::piped (natural) | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Fumes (from)::hydrocarbons | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Fumes (from)::hydrocarbons::petroleum (liquefied) | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Fumes (from)::hydrocarbons::petroleum (liquefied)::distributed through pipes (pure or mixed with air) | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Fumes (from)::petroleum (liquefied) | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Fumes (from)::petroleum (liquefied)::distributed through pipes (pure or mixed with air) | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Fumes (from)::polyester | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Fumes (from)::specified source NEC [See Also: substance specified] | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Gas NEC::acetylene | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Gas NEC::from utility (for cooking, heating, or lighting) (after combustion) [See: Carbon, monoxide, fuel, utility]::prior to combustion | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Gas NEC::fuel (domestic use) (after combustion) [See Also: Carbon, monoxide, fuel]::prior to combustion | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Gas NEC::fuel (domestic use) (after combustion) [See Also: Carbon, monoxide, fuel]::utility | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Gas NEC::fuel (domestic use) (after combustion) [See Also: Carbon, monoxide, fuel]::utility::in mobile container | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Gas NEC::fuel (domestic use) (after combustion) [See Also: Carbon, monoxide, fuel]::utility::piped (natural) | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Gas NEC::hydrocarbon NEC | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Gas NEC::hydrocarbon NEC::liquefied [See: butane]::piped | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Gas NEC::illuminating (after combustion)::prior to combustion | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Gas NEC::marsh | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Gas NEC::mustard, not in war | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Gas NEC::natural | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Gas NEC::petroleum (liquefied) (distributed in mobile containers) | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Gas NEC::petroleum (liquefied) (distributed in mobile containers)::piped (pure or mixed with air) | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Gas NEC::piped (manufactured) (natural) NEC | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Gas NEC::refrigerant (chlorofluoro-carbon)::not chlorofluoro-carbon | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Gas NEC::stove (after combustion)::prior to combustion | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Gas NEC::utility (for cooking, heating, or lighting) (piped) NEC | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Gas NEC::utility (for cooking, heating, or lighting) (piped) NEC::in mobile container | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Gas NEC::utility (for cooking, heating, or lighting) (piped) NEC::piped (natural) | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Helium (nonmedicinal) NEC | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Hexahydrocresol (s)::cyanide::gas | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Hexahydrocresol (s)::Fluoride (liquid)::vapor | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Hydrocarbon gas | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Hydrocarbon gas::liquefied (mobile container) | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Hydrocarbon gas::liquefied (mobile container)::piped (natural) | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Hydrochloric acid (liquid)::vapor | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Hydrofluoric acid (liquid)::vapor | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Hydrogen | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Hydroquinone::vapor | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Illuminating gas (after combustion)::prior to combustion | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Industrial::fumes | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Iodine (antiseptic, external) (tincture) NEC::vapor | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Ligroin (e) (solvent)::vapor | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Liquefied petroleum gases | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Liquefied petroleum gases::piped (pure or mixed with air) | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Marsh gas | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Methane | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Methanethiol | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Methyl::bromide (gas) | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Methyl::chloride (gas) | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Methyl::mercaptan | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Methyl::sulfate (fumes) | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Natural::gas (piped) | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Nitric::acid (liquid)::vapor | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Nitroaniline::vapor | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Nitrous::acid (liquid)::fumes | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Oil (of)::fumes | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Ozone | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Paint NEC::fumes NEC | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Phosgene (gas) | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Polyester fumes | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Polyester resin hardener::fumes | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Polytetrafluoroethylene (inhaled) | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Propane (distributed in mobile container) | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Propane (distributed in mobile container)::distributed through pipes | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Propylene | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Pyridine::vapor | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Refrigerant gas (chlorofluoro-carbon)::not chlorofluoro-carbon | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Selenium NEC::fumes | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Sternutator gas | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Sulfur, sulfurated, sulfuric, sulfurous, sulfuryl (compounds NEC) (medicinal)::vapor NEC | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Tar NEC::fumes | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Toluidine::vapor | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Vapor [See Also: Gas]::specified source NEC | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
| Vinyl::chloride | T59.891 | T59.892 | T59.893 | T59.894 | – | – |
Patient EducationClinical
Poisoning
A poison is any substance that is harmful to your body. You might swallow it, inhale it, inject it, or absorb it through your skin. Any substance can be poisonous if too much is taken. Poisons can include:
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert T59.894S to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code History & ChangesHistory
Replaced This code was replaced in the FY 2027 code set by:
- T59.824S - Toxic effect of hexamethylene diisocyanate, undet, sequela
Questions About T59.894SOverview
Is T59.894S a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report toxic effect of other specified gases, fumes and vapors, undetermined, sequela on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What does the 7th character S in T59.894S mean?
The final character S makes this a sequela code: it reports a lingering problem that remains after the toxic effect of other specified gases, fumes and vapors, undetermined itself has resolved, not the original event.
What MS-DRG does T59.894S group to?
When toxic effect of other specified gases, fumes and vapors, undetermined, sequela is the principal diagnosis on an inpatient stay, it groups to MS-DRG 923, 922, with relative weights from 0.9980 to 1.6248 depending on complications. Higher weights mean higher Medicare reimbursement.
Is T59.894S exempt from POA reporting?
Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for toxic effect of other specified gases, fumes and vapors, undetermined, sequela on inpatient claims. The code appears in the Toxic effects of substances chiefly nonmedicinal as to source (T51-T65) range of the CMS exempt list.
Can T59.894S be reported with T53.5?
Not as a rule. The Excludes1 note at T59, which applies to T59.894S, lists "chlorofluorocarbons (T53.5)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).
