About John Stasiewicz, MD

Welcome to John Stasiewicz, MD, a trusted Family Practice Physician serving patients in Barranca Pkwy Suite 200, 4050 Barranca Pkwy Suite 200. With a 5.00 rating from 177 reviews, we are committed to providing personalized care, great service and quality, and convenient accessible facilities for families in every stage of life.

Last updated: May 28, 2026

Business Hours

Closed · Monday 8 AM-5 PM
Thursday 8 AM-5 PM
Friday 8 AM-5 PM
Saturday Closed
Sunday Closed
Monday 8 AM-5 PM
Tuesday 8 AM-5 PM
Wednesday 8 AM-5 PM

Customer Reviews

5.00
Based on 177 reviews
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Ron Evans

Dr Staz is the best! He's been my GP for over 40 years. He listens, explains things well and has given me excellent care. He's the best!

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Percy Zelnick

Dr Stasiewicz cares about me, is thoughtful and always takes time to carefully explain any new conditions that crop up. He connects me to excellent specialists when required. He quickly makes himself available when I need help and am Concerned. I feel very secure in his hands.

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Sheri Madrid

Dr Stasewicz is knowledgeable, honest, helpful and supportive. I truly value his expertise. He has helped me make important changes in my life that has benefited me and my family. He’s the best. I highly recommend him.

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Jayaram Rao

Dr. Stassiewicz is very thorough, to the point and appreciates the effort and encourages to stay healthy. Have been going to him for 15+ yrs. Extremely happy and whole heartedly recommend him for future patients.

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Travis Smith

I always feel he hears my concerns and addresses them with care.

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Chu wailei

Dr. Stasiewicz is very patient and knowledgeable. He listens and gives good medical advice. I feel comfortable to talk to him. His nurse is friendly too which is a plus.

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Annie Fu

I just had my appointment with Dr. Stasiewicz for the first time and he is one of the best doctors I’ve ever had. He is knowledgeable, kind, and funny. He takes time to truly listen to your concerns to find the right solution. I will continue to see him for sure! Thank you Dr. Stasiewicz and your kind team members!

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Guadalupe Lambaren

I had my first appointment with Dr. Stasiewicz today, and I couldn't be more impressed! From the moment I walked in, he made me feel like a valued patient rather than just a number. He took the time to thoroughly explain my condition, which turned out to be different from what I initially thought. I really appreciated his approach—he didn't …

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Kim Kirkbride

Dr. S is kind, patient, informative and truly interested in his patients. I have a complicated medical history and he didn’t blink an eye at knowing what to do next and respected my knowledge about my own conditions. He is a wonderful doctor and person! Not to mention good staff is AMAZING! Just as kind and interested as he is. …

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Ingrid Lawrence

Dr.Stas has been my primary care doctor for over 30 years. He's the BEST, very thorough, and has answered all my questions. Referred me other specialists when necessary.

People Also Ask

Where is John Stasiewicz, MD located?
John Stasiewicz, MD is located at 4050 Barranca Pkwy Suite 200, Irvine, CA 92604, United States , Barranca Pkwy Suite 200, 4050 Barranca Pkwy Suite 200, United States. You can get directions here.
What is John Stasiewicz, MD rated?
John Stasiewicz, MD has a rating of 5.00 out of 5 stars based on 177 customer reviews.
What are John Stasiewicz, MD's hours?
John Stasiewicz, MD's hours vary by day. Please check the Business Hours section above for the full weekly schedule.
How do I contact John Stasiewicz, MD?
You can reach John Stasiewicz, MD by phone at +1 877-696-3622.
What type of business is John Stasiewicz, MD?
John Stasiewicz, MD is a health & wellness business located in Barranca Pkwy Suite 200, 4050 Barranca Pkwy Suite 200. <!-- VOILA_REWRITTEN --> Welcome to John Stasiewicz, MD, a trusted Family Practice Physician serving patients in Barranca Pkwy Suite 200, 4050 Barranca Pkwy Suite 200. With a 5.00 rating from …