2026 ICD-10-CM Diagnosis Code T39.8X3APoisoning by other nonopioid analgesics and antipyretics, not elsewhere classified, assault, initial encounter
T39.8X3A is a billable ICD-10-CM diagnosis code for poisoning by other nonopioid analgesics and antipyretics, not elsewhere classified, assault, 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, assault; External cause codes: poisoning by drug; and Poisoning by drugs, initial encounter.
Code Identity
Code Classification
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
Clonixin
anti-inflammatory analgesic.Glafenine
an anthranilic acid derivative with analgesic properties used for the relief of all types of pain.Jamaica
an island in the greater antilles in the west indies. its capital is kingston. it was discovered in 1494 by columbus and was a spanish colony 1509-1655 until captured by the english. its flourishing slave trade was abolished in the 19th century. it was a british colony 1655-1958 and a territory of the west indies federation 1958-62. it achieved full independence in 1962. the name is from the arawak xaymaca, rich in springs or land of springs. (from webster's new geographical dictionary, 1988, p564 & room, brewer's dictionary of names, 1992, p267)Smilax
a plant genus of the family smilacaceae. members contain smiglasides (phenylpropanoid glycosides) and steroidal saponins. commercially it is sometimes adulterated with hemidesmus, which would affect experimental results. drinks called sarsaparilla and root beer have been prepared from the smilaz ornata (jamaican sarsaparilla) and sassafras.Ketorolac
a pyrrolizine carboxylic acid derivative structurally related to indomethacin. it is an nsaid and is used principally for its analgesic activity. (from martindale the extra pharmacopoeia, 31st ed)Ketorolac Tromethamine
a pyrrolizine carboxylic acid derivative structurally related to indomethacin. it is a non-steroidal anti-inflammatory agent used for analgesia for postoperative pain and inhibits cyclooxygenase activity.Meptazinol
a narcotic antagonist with analgesic properties. it is used for the control of moderate to severe pain.Nefopam
non-narcotic analgesic chemically similar to orphenadrine. its mechanism of action is unclear. it is used for the relief of acute and chronic pain. (from martindale, the extra pharmacopoeia, 30th ed, p26)Phenazopyridine
a local anesthetic that has been used in urinary tract disorders. its use is limited by problems with toxicity (primarily blood disorders) and potential carcinogenicity.Sumatriptan
a serotonin agonist that acts selectively at 5ht1 receptors. it is used in the treatment of migraine disorders.
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
Pain Relievers
Pain relievers are medicines that reduce or relieve headaches, sore muscles, arthritis, or other aches and pains. There are many different pain medicines, and each with advantages and risks. Some types of pain respond better to certain medicines than others. Each person may also have a slightly different response to a pain reliever.
The full article covers:
- What are pain relievers?
- What are the types of over-the-counter pain relievers?
- What are prescription pain relievers?
- What are some non-drug treatments for pain?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert T39.8X3A to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About T39.8X3AOverview
Is T39.8X3A a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report poisoning by other nonopioid analgesics and antipyretics, not elsewhere classified, assault, initial encounter on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What does the 7th character A in T39.8X3A mean?
The final character A marks the initial encounter: use it while the patient is receiving active treatment for poisoning by other nonopioid analgesics and antipyretics, not elsewhere classified, assault, such as an emergency visit or first evaluation.
What MS-DRG does T39.8X3A group to?
When poisoning by other nonopioid analgesics and antipyretics, not elsewhere classified, assault, 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 T39.8X3A?
Under the General Equivalence Mappings, poisoning by other nonopioid analgesics and antipyretics, not elsewhere classified, assault, initial encounter converts to ICD-9-CM 965.7 (pois-no-narc analges NEC) and E962.0 (assault-pois w medic agt). 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.
