T50.9 ICD-10-CA code: Poisoning by other and unspecified drugs, medicaments and biological substances
T50.9 is the ICD-10-CA code for “Poisoning by other and unspecified drugs, medicaments and biological substances” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.
Official description
T50.9Poisoning by other and unspecified drugs, medicaments and biological substances
Short description: Poisn oth NOS drgs medicaments biol subs
ICD-10-CA · Canada · Also written T509
Index terms
Entries in CIHI’s alphabetical index that lead to T50.9. Searching the index by the condition the note names is how coders reach this code.
- Overdose, overdosage (drug)
- Wrong drug (given in error) NEC
- Reaction, drug NEC, overdose or poisoning
- Shock, drug, overdose or wrong drug given or taken
- Reaction, drug NEC, wrong substance given or taken in error
- Ingestion, drug or medicament, overdose or wrong substance given or taken
- Lyell's syndrome, due to drug, overdose or wrong substance given or taken
- Medicine poisoning (by overdose) (wrong substance given or taken in error)
- Arthus' phenomenon or reaction, due to, overdose or wrong substance given or taken
- Necrolysis, toxic epidermal, due to drug, overdose or wrong substance given or taken
- Effect, adverse NEC, drugs and medicaments NEC, overdose or wrong substance given or taken
- Shock, anaphylactic, drug or medicinal substance, overdose or wrong substance given or taken
- Porphyria (South African) (Swedish), due to drugs, overdose or wrong substance given or taken
- Constipation (atonic) (simple) (spastic), drug induced, overdose or wrong substance given or taken
- Epidermolysis, necroticans combustiformis, due to drug, overdose or wrong substance given or taken
- Dermatitis, due to, vaccine or vaccination (correct substance properly administered), wrong substance given or taken
- Polyneuropathy (peripheral) (critical illness), in (due to), drug or medicament, overdose or wrong substance given or taken
- Dermatitis, due to, drugs and medicaments (correct substance properly administered) (generalized) (internal use), wrong substance given or taken
- Dermatitis, due to, ingestion, ingested substance, drugs and medicaments (correct substance properly administered) (generalized), wrong substance given or taken
- Allergy, allergic (reaction), drug, medicament and biological (any) (correct medicinal substance properly administered) (external) (internal), wrong substance given or taken NEC
Notes for T50.9
As CIHI prints them, with any note T50.9 takes from the headings above it.
Includes
- Acidifying agentsAlkalizing agentsImmunoglobulinImmunologicalsLipotropic drugsParathyroid hormones and derivatives
- Overdose of these substanceswrong substance given or taken in errorFrom T36-T50 Poisoning by drugs, medicaments and biological substances
Excludes
Conditions classified elsewhere.
- Abuse of non-dependence-producing substances (F55)adverse effects ["hypersensitivity", "reaction", etc.] of correct substance properly administered; such cases are to be classified according to the nature of the adverse effect, such as:• aspirin gastritis (K29.-)• blood disorders (D50-D76)• dermatitis• contact (L23-L25)• due to substances taken internally (L27.-)• nephropathy (N14.0-N14.2)• unspecified adverse effect of drug (T88.7)drug:• intoxication meaning inebriation (F10-F19)• reaction and poisoning affecting the fetus and newborn (P00-P96)pathological drug intoxication (F10-F19)From T36-T50 Poisoning by drugs, medicaments and biological substances
- Birth trauma (P10-P15)obstetric trauma (O70-O71)From Chapter 19: Injury, poisoning and certain other consequences of external causes (S00-T98)
Note
- The chapter uses the S-section for coding different types of injuries related to single body regions and the T-section to cover injuries to multiple or unspecified body regions as well as poisoning and certain other consequences of external causes.Where multiple sites of injury are specified in the titles, the word "with" indicates involvement of both sites, and the word "and" indicates involvement of either or both sites.The principle of multiple coding of injuries should be followed wherever possible.Combination categories for multiple injuries is provided for use when there are insufficient detail as to the nature of the individual conditions, or for primary tabulation purposes when it is more convenient to record single code; otherwise, the component injuries should be coded separately.Reference should also be made to the coding rules and guidelines.The blocks of the S-section as well as (T00-T14 and T90-T98) contain injuries at the three-character level classified by type as follows:Superficial injury including:abrasionblister (nonthermal)contusion, including bruise and haematomainjury from superficial foreign body (splinter) without major open woundinsect bite (nonvenomous)Open wound including:animal bitecutlacerationpuncture wound:• NOS• with (penetrating) foreign bodyFracture including:Fracture:closed: comminuted, depressed, elevated, fissured, greenstick, impacted, linear, simple, slipped epiphysis, spiral — with or without delayed healingdislocateddisplacedFracture:open: compound, infected, missile, puncture, with foreign body — with or without delayed healingExcludes:malunion of fracture (M84.0)nonunion of fracture [pseudoarthrosis] (M84.1)pathological fracture (M84.4):• with osteoporosis (M80.-)stress fracture (M84.3)Dislocation, sprain and strain including:avulsion, laceration, sprain, strain, traumatic: haemarthosis, rupture, subluxation, tear of cartilage, joint (capsule), ligamentInjury to nerves and spinal cord including:complete or incomplete lesion of spinal cordlesion incontinuity of nerves and spinal cordtraumatic:• division of nerve• haematomyelia• paralysis (transient)• paraplegia• quadriplegiaInjury to blood vessels includingavulsion, cut, laceration, traumatic: aneurysm or fistula (arteriovenous), arterial haematoma, rupture of blood vesselsInjury of muscle, fascia and tendon including:avulsion, cut, laceration, strain, traumatic rupture of muscle, fascia and tendonCrushing InjuryTraumatic amputationInjury to internal organs including:blast injuries, bruise, concussion injuries, crushing, laceration, traumatic: haematoma, puncture, rupture, tear of internal organsOther and unspecified injuriesFrom Chapter 19: Injury, poisoning and certain other consequences of external causes (S00-T98)
Where T50.9 sits
- 1ChapterChapter 19: Injury, poisoning and certain other consequences of external causes (S00-T98)
- 2Block T36-T50Poisoning by drugs, medicaments and biological substances
- 3Category T50Poisoning by diuretics and other and unspecified drugs, medicaments and biological substances
- 4Valid code T50.9Poisoning by other and unspecified drugs, medicaments and biological substances
Source and release
- Data release
- ICD-10-CA · FY 2026–2027
- Effective date
- Apr 1, 2026
- Publisher
- CIHI
This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.
Frequently asked questions
What does ICD-10-CA code T50.9 mean?
T50.9 is the ICD-10-CA code for “Poisoning by other and unspecified drugs, medicaments and biological substances” in CIHI’s ICD-10-CA FY 2026–2027 release.
Where is T50.9 in ICD-10-CA?
T50.9 sits under T50 Poisoning by diuretics and other and unspecified drugs, medicaments and biological substances, within T36-T50 Poisoning by drugs, medicaments and biological substances, within Chapter 19: Injury, poisoning and certain other consequences of external causes (S00-T98).
What coding notes apply to T50.9?
ICD-10-CA lists Includes, Excludes, Note notes for T50.9, including those from the headings it sits under. They are listed on this page with where each one comes from.
Which ICD-10-CA release does this page use?
It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.
Codes beside T50.9
View T50T50.0Poisoning by mineralocorticoids and their antagonistsT50.1Poisoning by loop [high-ceiling] diureticsT50.2Poisoning by carbonic-anhydrase inhibitors, benzothiadiazides and other diureticsT50.3Poisoning by electrolytic, caloric and water-balance agentsT50.4Poisoning by drugs affecting uric acid metabolismT50.5Poisoning by appetite depressantsT50.6Poisoning by antidotes and chelating agents, not elsewhere classifiedT50.7Poisoning by analeptics and opioid receptor antagonistsT50.8Poisoning by diagnostic agents