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Welcome to California Sinus Centers

We’re dedicated to providing the highest level of sinus care throughout Northern California

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“I feel so blessed you came our way.

I’m so grateful we are on the road to recovery! Thank you for investing your knowledge, skills, and compassion towards my son.”

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“Your kindness, competency and efficiency make us feel very safe in your care.

Your top-notch office associates are truly the benchmark that we now measure all office encounters by!”

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Find an Office: Atherton · Pleasanton · Sonoma · Walnut Creek

Sinus Specialists in the Bay Area

California Sinus Centers are the premier centers of excellence in Northern California for the care of patients with disorders of the nose and sinuses. At Cal Sinus we aim to provide the best possible care to our patients in a comfortable and compassionate environment. Our providers are highly experienced surgeons (over 3000 cases) and are fellowship-trained surgeons who are national and international leaders in the field of rhinology. Through efforts in clinical care, education and research we strive to improve your sinuses and overall health.

Advanced Sinus Care

California Sinus Centers specialize in the diagnosis and treatment of complex disorders of the nose and paranasal sinuses.


Our sinus experts are available at locations throughout Northern California’s San Francisco Bay Area and Peninsula.

Your Upcoming Visit

Be prepared for your upcoming appointment by accessing our patient information area

In Office Technology

At the California Sinus Centers we are committed to incorporating technology into our practice to provide the safest, most effective and accessible sinus care to you and your family members.

Meet Our Providers

Karen J. Fong, M.D.
Karen J. Fong, MD
Winston C. Vaughan, M.D.
Winston C. Vaughan, MD
Kathleen Low, NP
Kathleen Low, NP

What Our Patients Are Saying

5 Stars

Dec 26, 2023

Dr. Vaughan has greatly improved my girlfriend’s sinus health. She has returned to be his patient after many years because she has never been able to find an ENT as good as him. Offers super convenient Saturday appointments as well for those like us who travel from out of town. Also appreciate the staffing here great customer service very clean environment. I will Highly recommend this place.
5 Stars

Dec 15, 2023

Best ENT I have seen! Both Dr. Vaughan and Kathleen Low are excellent! Very knowledgeable, thorough, and up-to-date with the state-of-the-art. Both take lots of time to explain everything very well, and it's always nice to talk to them in general. I highly recommend both of them, especially for sinus-related issues. They even have CT in the office which is very convenient, if needed.
5 Stars

Nov 6, 2023

Dr. Vaughn is so knowledgeable, conscientious, and good at what he does. The staff are always professional and courteous, and the office is impeccable. I feel grateful for having been referred to CSC when I was in need and can't thank their team enough for their care.
5 Stars

Nov 5, 2023

I highly recommend Dr. Vaughan and his staff. I've seen a number of ENTs and Dr. Vaughan is best for me. I have seen him for a number of years with a difficult case. He brings broad experience to bear on recommending treatment plans that are appropriate (not too aggressive or too mild). He discusses his findings and recommendations. And he will answer all of my questions thoroughly in an approachable and friendly manner. His staff is also very cordial and helpful.
5 Stars

Sep 1, 2023

I absolutely love Dr. Vaughn and his team! They are always so sweet, kind and very professional, thank you for helping me with my asthma issues. Noella Lelham
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What’s New at California Sinus Centers

Is Snoring A Sign Of Sleep Apnea?

Anyone who shares a bed or a room with a snorer knows how disruptive it is. You shake the bed, nudge them, and as a last resort, you might even throw your pillow at them. They keep you awake, and they may be causing themselves harm. Is snoring a sign of sleep apnea? Our sinus…

Spooktacular Shenanigans at California Sinus Centers

California Sinus Centers brought the Halloween spirit to life with a spooktacular party! Many of our staff embraced the holiday spirit by dressing up as characters from the Barbie movie, bringing a lighthearted and enjoyable atmosphere to our office. We hope you had a fantastic Halloween celebration too, filled with good times and laughter!

Is It a Sinus Headache–Or Something Else?

We’ve all had that achy pain in the forehead, cheekbones, and bridge of the nose, but what exactly is it? If it’s accompanied by a runny nose, facial swelling, or fullness in the ears, it’s most likely a sinus headache. If you are struggling with sinus headaches, contact our ENT clinic in California to have…

Ready to get started?

Contact us today to request an appointment with Northern California’s premier sinus center