ICD-10-CM 2027
ICD-10 code for vascular complication
From the official ICD-10-CM alphabetic index entry “Complication (s) (from) (of) › vascular”. Page updated September 29, 2026.
About coding vascular complication
The ICD-10-CM code for vascular complication is I99.9 (Unspecified disorder of circulatory system). The official index lists 61 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on I99.9.
Within I99, choose I99.9 (Unspecified disorder of circulatory system) only when documentation doesn't support a more specific option: other disorder of circulatory system (I99.8).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 302 (Atherosclerosis with MCC, relative weight 1.1984) and DRG 303 (Atherosclerosis without MCC, relative weight 0.6612), in MDC 05 (Diseases and Disorders of the Circulatory System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific vascular complication codes (official index)
- device or implant T82.9 — Unspecified complication of cardiac and vascular prosthetic device, implant and graft
- embolism T82.818 — Embolism due to vascular prosthetic devices, implants and grafts
- fibrosis T82.828 — Fibrosis due to vascular prosthetic devices, implants and grafts
- hemorrhage T82.838 — Hemorrhage due to vascular prosthetic devices, implants and grafts
- infection or inflammation T82.7 — Infection and inflammatory reaction due to other cardiac and vascular devices, implants and grafts
- mechanical
- breakdown T82.519 — Breakdown (mechanical) of unspecified cardiac and vascular devices and implants
- specified device NEC T82.518 — Breakdown (mechanical) of other cardiac and vascular devices and implants
- displacement T82.529 — Displacement of unspecified cardiac and vascular devices and implants
- specified device NEC T82.528 — Displacement of other cardiac and vascular devices and implants
- leakage T82.539 — Leakage of unspecified cardiac and vascular devices and implants
- specified device NEC T82.538 — Leakage of other cardiac and vascular devices and implants
- malposition T82.529 — Displacement of unspecified cardiac and vascular devices and implants
- specified device NEC T82.528 — Displacement of other cardiac and vascular devices and implants
- obstruction T82.599 — Other mechanical complication of unspecified cardiac and vascular devices and implants
- specified device NEC T82.598 — Other mechanical complication of other cardiac and vascular devices and implants
- perforation T82.599 — Other mechanical complication of unspecified cardiac and vascular devices and implants
- specified device NEC T82.598 — Other mechanical complication of other cardiac and vascular devices and implants
- protrusion T82.599 — Other mechanical complication of unspecified cardiac and vascular devices and implants
- specified device NEC T82.598 — Other mechanical complication of other cardiac and vascular devices and implants
- pain T82.848 — Pain due to vascular prosthetic devices, implants and grafts
- specified type NEC T82.898 — Other specified complication of vascular prosthetic devices, implants and grafts
- stenosis T82.858 — Stenosis of other vascular prosthetic devices, implants and grafts
- thrombosis T82.868 — Thrombosis due to vascular prosthetic devices, implants and grafts
- dialysis catheter
- following infusion, therapeutic injection or transfusion T80.1 — Vascular complications following infusion, transfusion and therapeutic injection
- graft T82.9 — Unspecified complication of cardiac and vascular prosthetic device, implant and graft
- embolism T82.818 — Embolism due to vascular prosthetic devices, implants and grafts
- fibrosis T82.828 — Fibrosis due to vascular prosthetic devices, implants and grafts
- hemorrhage T82.838 — Hemorrhage due to vascular prosthetic devices, implants and grafts
- mechanical
- breakdown T82.319 — Breakdown (mechanical) of unspecified vascular grafts
- aorta (bifurcation) T82.310 — Breakdown (mechanical) of aortic (bifurcation) graft (replacement)
- carotid artery T82.311 — Breakdown (mechanical) of carotid arterial graft (bypass)
- specified vessel NEC T82.318 — Breakdown (mechanical) of other vascular grafts
- displacement T82.329 — Displacement of unspecified vascular grafts
- aorta (bifurcation) T82.320 — Displacement of aortic (bifurcation) graft (replacement)
- carotid artery T82.321 — Displacement of carotid arterial graft (bypass)
- specified vessel NEC T82.328 — Displacement of other vascular grafts
- leakage T82.339 — Leakage of unspecified vascular graft
- aorta (bifurcation) T82.330 — Leakage of aortic (bifurcation) graft (replacement)
- carotid artery T82.331 — Leakage of carotid arterial graft (bypass)
- femoral artery T82.332 — Leakage of femoral arterial graft (bypass)
- specified vessel NEC T82.338 — Leakage of other vascular grafts
- malposition T82.329 — Displacement of unspecified vascular grafts
- aorta (bifurcation) T82.320 — Displacement of aortic (bifurcation) graft (replacement)
- carotid artery T82.321 — Displacement of carotid arterial graft (bypass)
- specified vessel NEC T82.328 — Displacement of other vascular grafts
- obstruction T82.399 — Other mechanical complication of unspecified vascular grafts
- aorta (bifurcation) T82.390 — Other mechanical complication of aortic (bifurcation) graft (replacement)
- carotid artery T82.391 — Other mechanical complication of carotid arterial graft (bypass)
- specified vessel NEC T82.398 — Other mechanical complication of other vascular grafts
- perforation T82.399 — Other mechanical complication of unspecified vascular grafts
- aorta (bifurcation) T82.390 — Other mechanical complication of aortic (bifurcation) graft (replacement)
- carotid artery T82.391 — Other mechanical complication of carotid arterial graft (bypass)
- specified vessel NEC T82.398 — Other mechanical complication of other vascular grafts
- protrusion T82.399 — Other mechanical complication of unspecified vascular grafts
- aorta (bifurcation) T82.390 — Other mechanical complication of aortic (bifurcation) graft (replacement)
- carotid artery T82.391 — Other mechanical complication of carotid arterial graft (bypass)
- specified vessel NEC T82.398 — Other mechanical complication of other vascular grafts
- pain T82.848 — Pain due to vascular prosthetic devices, implants and grafts
- specified complication NEC T82.898 — Other specified complication of vascular prosthetic devices, implants and grafts
- stenosis T82.858 — Stenosis of other vascular prosthetic devices, implants and grafts
- thrombosis T82.868 — Thrombosis due to vascular prosthetic devices, implants and grafts
- postoperative
Common questions about vascular complication ICD-10 codes
What is the ICD-10 code for vascular complication?
- I99.9 — Unspecified disorder of circulatory system. More specific codes apply when the documentation supports them: T82.9, T82.818, T82.828, T82.838 and others below.
What is the ICD-10 code for device or implant vascular complication?
- T82.9 — Unspecified complication of cardiac and vascular prosthetic device, implant and graft (header code; choose a more specific subcode).
What is the ICD-10 code for graft vascular complication?
- T82.9 — Unspecified complication of cardiac and vascular prosthetic device, implant and graft (header code; choose a more specific subcode).
Is I99.9 billable?
- Yes. I99.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can I99.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict I99.9 as a principal diagnosis.
Is I99.9 a CC or MCC?
- No. I99.9 is neither a CC nor an MCC under MS-DRG v44.0.