T40.3Methadone
Code usage status
Primary diagnosis
May be used as the primary diagnosis
Apply only when it matches the confirmed diagnosis and the documented clinical record.
Specificity
Complete code in the classification
Use when the diagnosis matches and no exclusion applies.
- Official Vietnamese name
- Ngộ độc methadone
Related T40 codes
T40
Poisoning by narcotics and psychodysleptics [hallucinogens]
T40.0
Primary diagnosis candidate
Opium
T40.1
Primary diagnosis candidate
Heroin
T40.2
Primary diagnosis candidate
Other opioids
T40.4
Primary diagnosis candidate
Other synthetic narcotics
T40.5
Primary diagnosis candidate
Cocaine
T40.6
Primary diagnosis candidate
Other and unspecified narcotics
T40.7
Primary diagnosis candidate
Cannabis (derivatives)
T40.8
Primary diagnosis candidate
Lysergide [LSD]
T40.9
Primary diagnosis candidate
Other and unspecified psychodysleptics [hallucinogens]
Clinical record checklist
View coding guide →- Confirm that the code matches the final documented diagnosis.
- Use one primary-diagnosis code and record only relevant additional conditions.
- Review Ministry indicators, inclusions, exclusions and notes.
- Do not infer a diagnosis beyond the clinical record.
2026 regulatory basis
Indicators are taken from columns 24–29 of the classification accompanying Circular 06/2026/TT-BYT, cross-referenced with Decision 1849/QĐ-BYT and Official Dispatch 4059/BYT-BH.
