I99 ICD-10-CA code: Other and unspecified disorders of circulatory system
I99 is the ICD-10-CA code for “Other and unspecified disorders of circulatory system” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.
Official description
I99Other and unspecified disorders of circulatory system
Short description: Other & unspec disrd circulatory system
ICD-10-CA · Canada
Index terms
Entries in CIHI’s alphabetical index that lead to I99. Searching the index by the condition the note names is how coders reach this code.
- Damage, vascular
- Ischemia, ischemic
- Disturbance, vascular
- Circulation, defective
- Angiopathia, angiopathy
- Angiectasis, angiectopia
- Change(s) (of), vascular
- Dilatation, blood vessel
- Disturbance, circulatory
- Fluctuating blood pressure
- Atrophy, atrophic, vascular
- Change(s) (of), circulatory
- Disease, diseased, vascular
- Blood, pressure, fluctuating
- Defect, defective, circulation
- Deficiency, deficient, vascular
- Lesion (nontraumatic), vascular
- Disease, diseased, blood, vessel
- Circulation, collateral, any site
- Occlusion, occluded, vascular NEC
- Defect, defective, vascular (local)
- Occlusion, occluded, vessel (blood)
- Insufficiency, insufficient, vascular
- Disease, diseased, vascular, occlusive
- Insufficiency, insufficient, arteriovenous
- Disease, diseased, circulatory (system) NEC
- Insufficiency, insufficient, circulatory NEC
- Obstruction, obstructed, obstructive, vessel NEC
- Complication, complications (from) (of), vascular
- Obstruction, obstructed, obstructive, circulatory
- Complication, complications (from) (of), circulatory
- Congestion, congestive (chronic) (passive), circulatory NEC
Notes for I99
As CIHI prints them, with any note I99 takes from the headings above it.
Excludes
Conditions classified elsewhere.
- Certain:• conditions originating in the perinatal period (P00-P96)• infectious and parasitic diseases (A00-B99)complications of pregnancy, childbirth and the puerperium (O00-O99)congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)endocrine, nutritional and metabolic diseases (E00-E90)injury, poisoning and certain other consequences of external causes (S00-T98)neoplasms (C00-D48)symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)systemic connective tissue disorders (M30-M36)transient cerebral ischaemic attacks and related syndromes (G45.-)From Chapter 9: Diseases of the circulatory system (I00-I99)
Where I99 sits
- 1ChapterChapter 9: Diseases of the circulatory system (I00-I99)
- 2Block I95-I99Other and unspecified disorders of the circulatory system
- 3Valid code I99Other and unspecified disorders of circulatory system
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 I99 mean?
I99 is the ICD-10-CA code for “Other and unspecified disorders of circulatory system” in CIHI’s ICD-10-CA FY 2026–2027 release.
Where is I99 in ICD-10-CA?
I99 sits under I95-I99 Other and unspecified disorders of the circulatory system, within Chapter 9: Diseases of the circulatory system (I00-I99).
What coding notes apply to I99?
ICD-10-CA lists Excludes notes for I99, 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.