2026 ICD-10-CM Diagnosis Code T39.392APoisoning by other nonsteroidal anti-inflammatory drugs [NSAID], intentional self-harm, initial encounter
T39.392A is a billable ICD-10-CM diagnosis code for poisoning by other nonsteroidal anti-inflammatory drugs [NSAID], intentional self-harm, initial encounter. The 7th character A marks it as an initial encounter code, used while the patient is receiving active treatment. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 917 through 918. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under External cause codes: intent of injury, self-harm; External cause codes: poisoning by drug; and Poisoning by drugs, initial encounter.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Acemetacin overdose
- Acemetacin poisoning
- Diclofenac overdose
- Diclofenac poisoning
- Etodolac overdose
- Etodolac poisoning
- Felbinac overdose
- Felbinac poisoning
- Fenbufen overdose
- Fenbufen poisoning
- Indomethacin overdose
- Intentional acemetacin overdose
- Intentional acemetacin poisoning
- Intentional diclofenac overdose
- Intentional diclofenac poisoning
- Intentional etodolac overdose
- Intentional etodolac poisoning
- Intentional felbinac overdose
- Intentional felbinac poisoning
- Intentional fenbufen overdose
- Intentional fenbufen poisoning
- Intentional indomethacin overdose
- Intentional indomethacin poisoning
- Intentional mefenamic acid overdose
- Intentional mefenamic acid poisoning
- Intentional nabumetone overdose
- Intentional nabumetone poisoning
- Intentional non-steroidal anti-inflammatory agent overdose
- Intentional piroxicam overdose
- Intentional piroxicam poisoning
- Intentional sulindac overdose
- Intentional sulindac poisoning
- Intentional tenoxicam overdose
- Intentional tenoxicam poisoning
- Intentional tolmetin overdose
- Intentional tolmetin poisoning
- Mefenamic acid overdose
- Mefenamic acid poisoning
- Nabumetone overdose
- Nabumetone poisoning
- Piroxicam overdose
- Piroxicam poisoning
- Poisoning by indomethacin
- Sulindac overdose
- Sulindac poisoning
- Tenoxicam overdose
- Tenoxicam poisoning
- Tolmetin overdose
- Tolmetin poisoning
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.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Diclofenac
a non-steroidal anti-inflammatory agent (nsaid) with antipyretic and analgesic actions. it is primarily available as the sodium salt.Etodolac
a non-steroidal anti-inflammatory agent and cyclooxygenase-2 (cox-2) inhibitor with potent analgesic and anti-arthritic properties. it has been shown to be effective in the treatment of osteoarthritis; rheumatoid arthritis; ankylosing spondylitis; and in the alleviation of postoperative pain (pain, postoperative).Flufenamic Acid
an anthranilic acid derivative with analgesic, anti-inflammatory, and antipyretic properties. it is used in musculoskeletal and joint disorders and administered by mouth and topically. (from martindale, the extra pharmacopoeia, 30th ed, p16)Indomethacin
a non-steroidal anti-inflammatory agent (nsaid) that inhibits cyclooxygenase, which is necessary for the formation of prostaglandins and other autacoids. it also inhibits the motility of polymorphonuclear leukocytes.Meclofenamic Acid
a non-steroidal anti-inflammatory agent with antipyretic and antigranulation activities. it also inhibits prostaglandin biosynthesis.Mefenamic Acid
a non-steroidal anti-inflammatory agent with analgesic, anti-inflammatory, and antipyretic properties. it is an inhibitor of cyclooxygenase.Nabumetone
a butanone non-steroidal anti-inflammatory drug and cyclooxygenase-2 (cox2) inhibitor that is used in the management of pain associated with osteoarthritis and rheumatoid arthritis.Piroxicam
a cyclooxygenase inhibiting, non-steroidal anti-inflammatory agent (nsaid) that is well established in treating rheumatoid arthritis and osteoarthritis and used for musculoskeletal disorders, dysmenorrhea, and postoperative pain. its long half-life enables it to be administered once daily.Sulindac
a sulfinylindene derivative prodrug whose sulfinyl moiety is converted in vivo to an active nsaid analgesic. specifically, the prodrug is converted by liver enzymes to a sulfide which is excreted in the bile and then reabsorbed from the intestine. this helps to maintain constant blood levels with reduced gastrointestinal side effects.Tolmetin
a non-steroidal anti-inflammatory agent (anti-inflammatory agents, non-steroidal) similar in mode of action to indomethacin.
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.
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 T39.392A to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About T39.392AOverview
Is T39.392A a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report poisoning by other nonsteroidal anti-inflammatory drugs [NSAID], intentional self-harm, initial encounter on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What does the 7th character A in T39.392A mean?
The final character A marks the initial encounter: use it while the patient is receiving active treatment for poisoning by other nonsteroidal anti-inflammatory drugs [NSAID], intentional self-harm, such as an emergency visit or first evaluation.
What MS-DRG does T39.392A group to?
When poisoning by other nonsteroidal anti-inflammatory drugs [NSAID], intentional self-harm, initial encounter is the principal diagnosis on an inpatient stay, it groups to MS-DRG 917, 918, with relative weights from 0.8571 to 1.5684 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of T39.392A?
Under the General Equivalence Mappings, poisoning by other nonsteroidal anti-inflammatory drugs [NSAID], intentional self-harm, initial encounter converts to ICD-9-CM 965.61 (pois-propionic acid derv) and E950.0 (poison-analgesics). The mapping is approximate, so confirm the match fits the documentation.
Footnotes
[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.
