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    v1.0.28
    OpenPayerBilling CodesPoisoning by, adverse effects of and underdosing of drugs, medicaments and biological substancesICD-10-CM t41-anesthetics-and-therapeutic-gases
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    ICD-10-CM Code For Poisoning By Adverse Effect Of And Underdosing Of Anesthetics And Therapeutic Gases: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group T41 includes poisoning, adverse effects, and underdosing of anesthetic agents and therapeutic gases used for anesthesia and respiratory therapy, covering overdoses, adverse reactions, and subtherapeutic dosing. These ICD-10-CM diagnosis codes are used to document clinical scenarios such as medication-related respiratory compromise, perioperative anesthetic complications, and errors in dosing that affect patient safety and treatment outcomes. Accurate coding within the ICD-10-CM T41 group supports proper claim adjudication and complete clinical documentation and appropriate reimbursement.

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    ICD-10-CM T41: Poisoning By, Adverse Effect Of And Underdosing Of Anesthetics And Therapeutic Gases Overview

    The ICD-10-CM T41 code group represents poisoning, adverse effects, and underdosing related to anesthetic agents and therapeutic gases that affect the nervous and respiratory systems. These diagnoses capture incidents ranging from accidental overdose and therapeutic complications to insufficient dosing leading to inadequate anesthesia or analgesia. Accurate coding matters for proper claim adjudication and to reflect clinical complexity and resource use.

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    When to Use

    Use a code from this group when a patient experiences poisoning, an adverse effect, or clinically significant underdosing related to anesthetics or therapeutic gases documented by the treating clinician. Codes are selected based on intent, encounter type, and whether the issue occurred during therapeutic use, as well as any associated complications.

    ICD-10-CM Codes

    126 rows

    ICD-10-CM CodeDescription
    T41.0X1APoisoning by inhaled anesthetics, accidental (unintentional), initial encounter
    T41.0X1DPoisoning by inhaled anesthetics, accidental (unintentional), subsequent encounter
    T41.0X1SPoisoning by inhaled anesthetics, accidental (unintentional), sequela
    T41.0X2APoisoning by inhaled anesthetics, intentional self-harm, initial encounter
    T41.0X2DPoisoning by inhaled anesthetics, intentional self-harm, subsequent encounter
    T41.0X2SPoisoning by inhaled anesthetics, intentional self-harm, sequela
    T41.0X3APoisoning by inhaled anesthetics, assault, initial encounter
    T41.0X3DPoisoning by inhaled anesthetics, assault, subsequent encounter
    T41.0X3SPoisoning by inhaled anesthetics, assault, sequela
    T41.0X4APoisoning by inhaled anesthetics, undetermined, initial encounter
    T41.0X4DPoisoning by inhaled anesthetics, undetermined, subsequent encounter
    T41.0X4SPoisoning by inhaled anesthetics, undetermined, sequela
    T41.0X5AAdverse effect of inhaled anesthetics, initial encounter
    T41.0X5DAdverse effect of inhaled anesthetics, subsequent encounter
    T41.0X5SAdverse effect of inhaled anesthetics, sequela
    T41.0X6AUnderdosing of inhaled anesthetics, initial encounter
    T41.0X6DUnderdosing of inhaled anesthetics, subsequent encounter
    T41.0X6SUnderdosing of inhaled anesthetics, sequela
    T41.1X1APoisoning by intravenous anesthetics, accidental (unintentional), initial encounter
    T41.1X1DPoisoning by intravenous anesthetics, accidental (unintentional), subsequent encounter

    Showing 1–20 of 126

    DRG Codes

    9 rows

    DRG CodeDescription
    791Prematurity with Major Problems
    793Full Term Neonate with Major Problems
    917Poisoning and Toxic Effects of Drugs with MCC
    918Poisoning and Toxic Effects of Drugs without MCC
    922Other Injury, Poisoning and Toxic Effect Diagnoses with MCC
    923Other Injury, Poisoning and Toxic Effect Diagnoses without MCC
    949Aftercare with CC/MCC
    950Aftercare without CC/MCC
    951Other Factors Influencing Health Status

    Typical Clinical Scenarios

    • An adult patient in the post-anesthesia care unit develops sudden respiratory depression and reduced consciousness immediately after a general anesthetic that included intravenous propofol for induction; staff suspect anesthetic overdose during surgery and the patient is emergently treated with airway support and observation. A code from this group is assigned to capture poisoning by an anesthetic agent due to excessive dosing during the procedure. Typical codes: T41.201A, T41.291A
    • An outpatient scheduled for a minor procedure reports persistent numbness and prolonged motor weakness in the limb after a regional/local anesthetic injection performed weeks earlier; the clinician documents a late adverse effect of the local anesthetic requiring follow-up and physical therapy. A code from this group is used to indicate an adverse effect of a therapeutic anesthetic agent manifesting after the procedure. Typical codes: T41.1X4D, T41.3X4D
    • An elderly nursing home resident receives a reduced dose of inhaled therapeutic gas during a chronic respiratory therapy regimen and subsequently experiences worsening hypoxemia and increased dyspnea, prompting hospitalization for respiratory support. A code from this group is assigned to indicate underdosing of a therapeutic gas leading to clinical deterioration and need for inpatient care. Typical codes: T41.42XA, T41.42XD

    Related Codes

    T36-POISONING-BY-SYSTEMIC-ANTIBIOTICS

    ICD-10-CM Code For Poisoning By, Adverse Effect Of And Underdosing Of Systemic Antibiotics: Group Overview

    T37-OTHER-SYSTEMIC-ANTI-INFECTIVES

    ICD-10-CM Code For Poisoning By Other Systemic Anti Infectives And Antiparasitics: Group Overview

    T38-HORMONE-POISONING-AND-UNDERDOSING

    ICD-10-CM Code For Poisoning By Adverse Effect And Underdosing Of Hormones And Their Synthetic Substitutes And Antagonists Not Elsewhere Classified: Group Overview

    T39-NONOPIOID-ANALGESIC-POISONING

    ICD-10-CM Code For Poisoning By Nonopioid Analgesics Antipyretics And Antirheumatics: Group Overview

    T40-POISONING-BY-NARCOTICS-AND-HALLUCINOGENS

    ICD-10-CM Code For Poisoning By Narcotics And Psychodysleptics: Group Overview

    T42-ANTIEPILEPTIC-SEDATIVE-HYPNOTIC-ANTIPARKINSONISM-DRUGS

    ICD-10-CM Code For Poisoning By Antiepileptic Sedative Hypnotic And Antiparkinsonism Drugs: Group Overview

    T43-POISONING-AND-ADVERSE-EFFECTS-PSYCHOTROPIC

    ICD-10-CM Code For Poisoning By Adverse Effect Of And Underdosing Of Psychotropic Drugs Not Elsewhere Classified: Group Overview

    T44-AUTONOMIC-NERVOUS-SYSTEM-DRUG-EVENTS

    ICD-10-CM Code For Poisoning By Adverse Effect Of And Underdosing Of Drugs Primarily Affecting The Autonomic Nervous System: Group Overview

    T45-PRIMARILY-SYSTEMIC-AND-HEMATOLOGICAL-AGENTS

    ICD-10-CM Code For Poisoning By Adverse Effect And Underdosing Of Primarily Systemic And Hematological Agents Not Elsewhere Classified: Group Overview

    T46-POISONING-CARDIOVASCULAR-AGENTS

    ICD-10-CM Code For Poisoning By Adverse Effect Of And Underdosing Of Agents Primarily Affecting The Cardiovascular System: Group Overview

    Showing 1–10 of 14

    Frequently Asked Questions

    References

    1. 1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
    2. 2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
    3. 3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.
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