Meet the Team

VISOC is led by a multidisciplinary team of knowledgeable, experienced and board-certified physicians.

Vascular Specialists


D. Preston Flanigan, M.D., FACS D. Preston Flanigan, M.D., FACS
1140 W. La Veta Ave, Ste 850
Orange, CA 92868
(714) 560-4450
Fax: (714) 560-4455
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Timothy R.S. Harward, M.D., FACS Timothy R.S. Harward, M.D., FACS
1140 W. La Veta Ave, Ste 850
Orange, CA 92868
(714) 560-4450
Fax: (714) 560-4455
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Tiffany Y. Wu, M.D. Tiffany Y. Wu, M.D.
1140 W. La Veta Ave, Ste 850
Orange, CA 92868
(714) 560-4450
Fax: (714) 560-4455
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Interventional Specialists


Kurt Openshaw, M.D. Kurt Openshaw, M.D.
1140 W. La Veta Ave, Ste 850
Orange, CA 92868
(714) 560-4450
Fax: (714) 560-4455
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Mahmood Razavi, M.D. Mahmood Razavi, M.D.
1140 W. La Veta Ave, Ste 850
Orange, CA 92868
(714) 560-4450
Fax: (714) 560-4455
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Chris Loh, M.D. Chris Loh, M.D.
1140 W. La Veta Ave, Ste 850
Orange, CA 92868
(714) 560-4450
Fax: (714) 560-4455
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Physician's Assistants


Stacey Tien, PA-C Stacey Tien, PA-C
1140 W. La Veta Ave, Ste 850
Orange, CA 92868
(714) 560-4450
Fax: (714) 560-4455
View Biography