2026 ICD-10-CM Diagnosis Code T41Poisoning by, adverse effect of and underdosing of anesthetics and therapeutic gases
T41 is a non-billable ICD-10-CM category code for poisoning by, adverse effect of and underdosing of anesthetics and therapeutic gases, so it cannot be submitted on claims. Use a more specific code from this category instead, such as T41.0X1A, T41.0X1D, T41.0X1S, and T41.0X2A.
Code Identity
Code Classification
Specific Coding for Anesthetics and therapeutic gasesOverview
Non-specific codes like T41 require more characters. Use one of these billable codes instead:
T41.0 for Poisoning by, adverse effect of and underdosing of inhaled anesthetics
T41.0X for Poisoning by, adverse effect of and underdosing of inhaled anesthetics
T41.1 for Poisoning by, adverse effect of and underdosing of intravenous anesthetics
T41.1X for Poisoning by, adverse effect of and underdosing of intravenous anesthetics
T41.2 for Poisoning by, adverse effect of and underdosing of other and unspecified general anesthetics
T41.20 for Poisoning by, adverse effect of and underdosing of unspecified general anesthetics
T41.29 for Poisoning by, adverse effect of and underdosing of other general anesthetics
T41.3 for Poisoning by, adverse effect of and underdosing of local anesthetics
T41.3X for Poisoning by, adverse effect of and underdosing of local anesthetics
T41.4 for Poisoning by, adverse effect of and underdosing of unspecified anesthetic
T41.41 for Poisoning by unspecified anesthetic, accidental (unintentional)
T41.42 for Poisoning by unspecified anesthetic, intentional self-harm
T41.43 for Poisoning by unspecified anesthetic, assault
T41.44 for Poisoning by unspecified anesthetic, undetermined
T41.45 for Adverse effect of unspecified anesthetic
T41.46 for Underdosing of unspecified anesthetics
T41.5 for Poisoning by, adverse effect of and underdosing of therapeutic gases
T41.5X for Poisoning by, adverse effect of and underdosing of therapeutic gases
Coding GuidelinesGuidance
When coding a poisoning or reaction to the improper use of a medication (e.g., overdose, wrong substance given or taken in error, wrong route of administration), first assign the appropriate code from categories T36-T50. The poisoning codes have an associated intent as their 5th or 6th character (accidental, intentional self-harm, assault and undetermined). If the intent of the poisoning is unknown or unspecified, code the intent as accidental intent. The undetermined intent is only for use if the documentation in the record specifies that the intent cannot be determined. Use additional code(s) for all manifestations of poisonings.
The appropriate 7th character is to be added to each code from block Poisoning by, adverse effect of and underdosing of anesthetics and therapeutic gases (T41). 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 2026, published by CMS and the National Center for Health Statistics.
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Type 1 Excludes
- benzodiazepines T42.4
- cocaine T40.5
- complications of anesthesia during pregnancy O29
- complications of anesthesia during labor and delivery O74
- complications of anesthesia during the puerperium O89
- opioids T40.0 T40.2
7th Character Note
- The appropriate 7th character is to be added to each code from category T41
7th Character
- A - initial encounter
- D - subsequent encounter
- S - sequela
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.
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.
Indicates that a seventh character is to be assigned to codes in a subcategory.
Patient EducationClinical
Anesthesia
Anesthesia is the use of medicines, called anesthetics, to prevent pain during surgery and other medical procedures. Medicine may be given by injection, inhalation, topical lotion, spray, eye drops, or a skin patch.
The full article covers:
- What is anesthesia?
- What is anesthesia used for?
- What are the types of anesthesia?
- What are the risks of anesthesia?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Code HistoryHistory
Questions About T41Overview
Is T41 a billable code?
No. This is a category header that groups the codes for poisoning by, adverse effect of and underdosing of anesthetics and therapeutic gases, and headers cannot be submitted on claims. Claims for poisoning by, adverse effect of and underdosing of anesthetics and therapeutic gases need a more specific code from this category, such as T41.0X1A, T41.0X1D, and T41.0X1S.
