T18 ICD-10-CA category: Foreign body in alimentary tract
T18 isn’t a code on its own. Choose one of the 8 codes beneath it, the one the documentation supports.
Official description
T18Foreign body in alimentary tract
ICD-10-CA · Canada
Codes in T18
T18 isn’t a code on its own. Open the code that matches what the note documents.
T18.0Foreign body in mouthT18.1Foreign body in oesophagusT18.2Foreign body in stomachT18.3Foreign body in small intestineT18.4Foreign body in colonT18.5Foreign body in anus and rectumT18.8Foreign body in other and multiple parts of alimentary tractT18.9Foreign body in alimentary tract, part unspecifiedNotes for T18
As CIHI prints them, with any note T18 takes from the headings above it.
Excludes
Conditions classified elsewhere.
- Foreign body in pharynx (T17.2)
- Foreign body:• accidentally left in operation wound (T81.5)• in puncture wound - see open wound by body region• residual, in soft tissue (M79.5)splinter, without major open wound - see superficial injury by body regionFrom T15-T19 Effects of foreign body entering through natural orifice
- 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 T18 sits
- 1ChapterChapter 19: Injury, poisoning and certain other consequences of external causes (S00-T98)
- 2Block T15-T19Effects of foreign body entering through natural orifice
- 3Category T18Foreign body in alimentary tract
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
Is T18 a valid ICD-10-CA code?
No. T18 (Foreign body in alimentary tract) is a category heading in CIHI’s ICD-10-CA FY 2026–2027 release. It holds 8 codes; record the one the documentation supports.
Where is T18 in ICD-10-CA?
T18 sits under T15-T19 Effects of foreign body entering through natural orifice, within Chapter 19: Injury, poisoning and certain other consequences of external causes (S00-T98).
What coding notes apply to T18?
ICD-10-CA lists Excludes, Note notes for T18, 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.