Expertise of Sylvester Onyishi, MD

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A strong call to help others inspired Sylvester Onyishi, MD, to become a doctor. Channeling his skills, talents and passion into his work as a urologist, he helps patients of all ages manage or resolve the urological issues holding them back from the activities they love.

Dr. Onyishi believes the best way to help you is to listen carefully to your concerns while building a strong person-to-person connection. That way, he'll better understand how your health issues are affecting your life and personalize his recommendations.

Dr. Onyishi received his medical degree from the University of Tennessee Health Science Center in Memphis and completed his residency at the University of Arizona College of Medicine, Tucson. He's a board-certified urologist and a member of the American Urological Association. A native of Nigeria, Dr. Onyishi also speaks Igbo.

Knowing that feeling whole requires fueling your body, mind and spirit, Dr. Onyishi is intentional with his time when he isn't helping patients. To stay physically strong, he enjoys playing tennis and lifting weights. And when he simply needs time to unwind and recharge, he spends quality time with his wife and their young son.

Personal Interests

Weight lifting, tennis.

Care Philosophy

Dr. Onyishi values the relationships he builds with his patients and respects the trust they place in his team.

You can count on him and his team to treat you with the same level of dignity and compassion they would want for their own loved ones. Dr. Onyishi and his team will listen carefully to your concerns to understand your needs and improve your outcomes.

Areas Served
Sebring, FL | Lake Placid, FL
Languages Spoken
English, Lgbo

The University of Tennessee Health Science Center


Urology at The University of Arizona

Medical Organization Memberships and Committees

American Urological Association


(2014). Pressure Flow studies in Men and Women. Urodynamics. 41(3), 453–467.

(2014). Detrusor Underactivity and Detrusor Hyperactivity with Impaired Contractility. Current Bladder Dysfunction Reports. 9(4), 341.

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Ages Accepted

Insurances accepted by Sylvester Onyishi, MD


The list below is for reference purposes only and is subject to change. Please check with your health plan to confirm that this doctor is included before scheduling an appointment.

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  • AdventHealth Advantage Plan

Reviews and Comments for Sylvester Onyishi, MD

4.8stars rating (307reviews)


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