T28.9 ICD-10-CA code: Corrosion of other and unspecified internal organs
T28.9 is the ICD-10-CA code for “Corrosion of other and unspecified internal organs” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.
Official description
T28.9Corrosion of other and unspecified internal organs
Short description: Corrosion of oth/unspec internal organs
ICD-10-CA · Canada · Also written T289
Index terms
Entries in CIHI’s alphabetical index that lead to T28.9. Searching the index by the condition the note names is how coders reach this code.
- Corrosion (injury) (acid) (caustic) (chemical) (external) (internal) (lime), internal organs NEC
- Burn (electricity) (flame) (hot gas, liquid or object) (radiation) (steam) (thermal), internal organs NEC, from caustic or corrosive substance (swallowing) NEC
Notes for T28.9
As CIHI prints them, with any note T28.9 takes from the headings above it.
Includes
- Burns:• air and hot gases• electrical heating appliances• electricity• flame• friction• lightning• objects• radiationchemical burns [corrosions] (external)(internal)scaldsFrom T20-T32 Burns and corrosions
Excludes
Conditions classified elsewhere.
- Erythema [dermatitis] ab igne (L59.0)radiation-related disorders of the skin and subcutaneous tissue (L55-L59)sunburn (L55.-)From T20-T32 Burns and corrosions
- Birth trauma (P10-P15)obstetric trauma (O70-O71)From Chapter 19: Injury, poisoning and certain other consequences of external causes (S00-T98)
Note
- Burns of internal organs are classified according to the site rather than the degree of the burnFrom T28 Burn and corrosion of other internal organs
- 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 T28.9 sits
- 1ChapterChapter 19: Injury, poisoning and certain other consequences of external causes (S00-T98)
- 2Block T20-T32Burns and corrosions
- 3Block T26-T28Burns and corrosions confined to eye and internal organs
- 4Category T28Burn and corrosion of other internal organs
- 5Valid code T28.9Corrosion of other and unspecified internal organs
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 T28.9 mean?
T28.9 is the ICD-10-CA code for “Corrosion of other and unspecified internal organs” in CIHI’s ICD-10-CA FY 2026–2027 release.
Where is T28.9 in ICD-10-CA?
T28.9 sits under T28 Burn and corrosion of other internal organs, within T26-T28 Burns and corrosions confined to eye and internal organs, within T20-T32 Burns and corrosions, within Chapter 19: Injury, poisoning and certain other consequences of external causes (S00-T98).
What coding notes apply to T28.9?
ICD-10-CA lists Note, Includes, Excludes notes for T28.9, 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 T28.9
View T28T28.0Burn of mouth and pharynxT28.1Burn of oesophagusT28.2Burn of other parts of alimentary tractT28.3Burn of internal genitourinary organsT28.4Burn of other and unspecified internal organsT28.5Corrosion of mouth and pharynxT28.6Corrosion of oesophagusT28.7Corrosion of other parts of alimentary tractT28.8Corrosion of internal genitourinary organs