Guidance for ICD-9-CM and ICD-10-CM discharge diagnosis codes associated with emergency department visits and/or hospitalisations for all drug, all opioids, heroin and all stimulant overdose
| Drug type | ICD-9-CM, any mention of diagnosis or external cause of injury code | ICD-10-CM | ||
| Any mention of diagnosis | And a fifth/sixth character of: | And a seventh character of: | ||
| All Drugs | 960–979: poisoning by drugs, medicinal and biological substances. E850-E858: accidental poisoning by drugs, medicinal substances and biologicals. E950.0-E950.5: suicide and self-inflicted poisoning by solid or liquid substances (note: this is analysed separately in OD2A* guidance). E980.0-E980.5: poisoning by solid or liquid substances undetermined whether accidentally or purposely inflicted. E962.0: assault by drugs and medicinal substances (note: not included in OD2A* guidance). | T36-T5: poisoning by drugs, medicaments and biological substances. | Intent is noted in the sixth character of ICD-10-CM codes between T36 and T50, with exceptions† where the fifth character shows intent. Character values: 1: accidental (unintentional). 2: intentional self-harm. 3: assault.‡ 4: undetermined intent. Does not include: 5: adverse effect.§ 6: underdosing.§ | A: initial encounter. Does not include: D: subsequent encounter. S: sequela. |
| All opioids | 965.00: poisoning by opium. 965.01: poisoning by heroin. 965.02: poisoning by methadone. 965.09: poisoning by other opiates and related narcotics. E850.0: accidental poisoning by heroin. E850.1: accidental poisoning by methadone. E850.2: accidental poisoning by other opiates and related narcotics. |
Before October 1 2020:
T40.0X: poisoning by opium. T40.1X: poisoning by heroin. T40.2X: poisoning by other opioids. T40.3X: poisoning by methadone. T40.4X: poisoning by synthetic narcotics.¶ T40.60: poisoning by unspecified narcotics. T40.69: poisoning by other narcotics. After 1 October 2020, T40.4X will become: T40.41: poisoning by fentanyl or fentanyl analogues. T40.42: poisoning by tramadol. T40.49: poisoning by other synthetic narcotics. | ||
| Heroin | 965.01: poisoning by heroin. E850.0: accidental poisoning by heroin. | T40.1X: poisoning by heroin. | ||
| All stimulants | 969.70: poisoning by psychostimulant, unspecified. 969.71: poisoning by caffeine. 969.72: poisoning by amphetamines. 969.73: poisoning by methylphenidate. 969.79: poisoning by other psychostimulants. 970.0: poisoning by analeptics. 970.81: poisoning by cocaine. 970.89: poisoning by other central nervous system stimulants. E854.2: accidental poisoning by psychostimulants. E854.3: accidental poisoning by central nervous system stimulants. E855.2: accidental poisoning by local anaesthetics. | T40.5X: poisoning by cocaine. T43.60: poisoning by unspecified psychostimulants. T43.61: poisoning by caffeine. T43.62: poisoning by amphetamines. T43.63: poisoning by methylphenidate. T43.64: poisoning by ecstasy. T43.69: poisoning by other psychostimulants. | ||
*OD2A is an acronym for CDC’s Overdose Data to Action funding - https://www.cdc.gov/drugoverdose/od2a/index.html.
†The exception to this rule, where the fifth character denotes the intention: T36.9, T37.9, T39.9, T41.4, T42.7, T43.9, T45.9, T47.9 and T49.9.
‡Assault intents are not included in CDC’s OD2A* guidance.
§When applicable, not all codes have an option for adverse effect or underdosing (eg, T40.1X does not include ‘5’ or ‘6’).
¶On 1 October 2020 revisions to this code will allow a more granular look at synthetic narcotic overdose – T40.4X will be replaced by three new codes: T40.41 (poisoning by fentanyl), T40.42 (poisoning by tramadol) and T40.49 (poisoning by other synthetic narcotics).
ICD-9-CM, International Classification of Diseases, Ninth Revision, Clinical Modification; ICD-10-CM, International Classification of Diseases, 10th Revision, Clinical Modification.