2026 ICD-10-CM Diagnosis Code T39Poisoning by, adverse effect of and underdosing of nonopioid analgesics, antipyretics and antirheumatics
T39 is a non-billable ICD-10-CM category code for poisoning by, adverse effect of and underdosing of nonopioid analgesics, antipyretics and antirheumatics, so it cannot be submitted on claims. Use a more specific code from this category instead, such as T39.011A, T39.011D, T39.011S, and T39.012A.
Code Identity
Code Classification
Specific Coding for Nonopioid analgesics, antipyretics and antirheumaticsOverview
Non-specific codes like T39 require more characters. Use one of these billable codes instead:
T39.0 for Poisoning by, adverse effect of and underdosing of salicylates
T39.01 for Poisoning by, adverse effect of and underdosing of aspirin
T39.09 for Poisoning by, adverse effect of and underdosing of other salicylates
T39.1 for Poisoning by, adverse effect of and underdosing of 4-Aminophenol derivatives
T39.1X for Poisoning by, adverse effect of and underdosing of 4-Aminophenol derivatives
T39.2 for Poisoning by, adverse effect of and underdosing of pyrazolone derivatives
T39.2X for Poisoning by, adverse effect of and underdosing of pyrazolone derivatives
T39.3 for Poisoning by, adverse effect of and underdosing of other nonsteroidal anti-inflammatory drugs [NSAID]
T39.31 for Poisoning by, adverse effect of and underdosing of propionic acid derivatives
T39.39 for Poisoning by, adverse effect of and underdosing of other nonsteroidal anti-inflammatory drugs [NSAID]
T39.4 for Poisoning by, adverse effect of and underdosing of antirheumatics, not elsewhere classified
T39.4X for Poisoning by, adverse effect of and underdosing of antirheumatics, not elsewhere classified
T39.8 for Poisoning by, adverse effect of and underdosing of other nonopioid analgesics and antipyretics, not elsewhere classified
T39.8X for Poisoning by, adverse effect of and underdosing of other nonopioid analgesics and antipyretics, not elsewhere classified
T39.9 for Poisoning by, adverse effect of and underdosing of unspecified nonopioid analgesic, antipyretic and antirheumatic
T39.91 for Poisoning by unspecified nonopioid analgesic, antipyretic and antirheumatic, accidental (unintentional)
T39.92 for Poisoning by unspecified nonopioid analgesic, antipyretic and antirheumatic, intentional self-harm
T39.93 for Poisoning by unspecified nonopioid analgesic, antipyretic and antirheumatic, assault
T39.94 for Poisoning by unspecified nonopioid analgesic, antipyretic and antirheumatic, undetermined
T39.95 for Adverse effect of unspecified nonopioid analgesic, antipyretic and antirheumatic
T39.96 for Underdosing of unspecified nonopioid analgesic, antipyretic and antirheumatic
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 nonopioid analgesics, antipyretics and antirheumatics (T39). 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.
7th Character Note
- The appropriate 7th character is to be added to each code from category T39
7th Character
- A - initial encounter
- D - subsequent encounter
- S - sequela
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
Drug Reactions
Most of the time, medicines make our lives better. They reduce aches and pains, fight infections, and control problems such as high blood pressure or diabetes. But medicines can also cause unwanted reactions, such as drug interactions, side effects, and allergies.
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Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Code HistoryHistory
Questions About T39Overview
Is T39 a billable code?
No. This is a category header that groups the codes for poisoning by, adverse effect of and underdosing of nonopioid analgesics, antipyretics and antirheumatics, and headers cannot be submitted on claims. Claims for poisoning by, adverse effect of and underdosing of nonopioid analgesics, antipyretics and antirheumatics need a more specific code from this category, such as T39.011A, T39.011D, and T39.011S.
