Doctor examining patient's back pain with hands while patient holds lower back in discomfort

SCHEDULING MADE EASY

Choose your provider, pick your time, and book online. No back-and-forth needed.

To book an appointment with your preferred provider, please visit their profile on our website and book directly at the link found under their photo!

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Proliance Surgery Center at Valley

Named Best Ambulatory Surgery Center by U.S. News for 2025

Proliance Surgery Center at Valley has been named one of the 2025 Best Ambulatory Surgery Centers fororthopedic and spine care by U.S. News & World Report. Out of thousands of facilities reviewed nationwide, only aselect few earned this honor — Proliance Surgery Center at Valley among them.

a set of keys

POA: Named Top Orthopedic & Surgical Care Provider in WA!

We are excited to announce that we have been named one of the top orthopedic and surgical care providers in Washington by Castle Connolly for 2025!

a group of surgeons performing surgery


Proliance Surgery Center at Valley

Recognized as Top 20 ASC Performing Most Knee Replacements!

POA is among the top 20 ASCs that performed the most total knee replacement procedures in U.S. in 2022, click through to view the entire list!

Introducing Our Newest Physician Assistants

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Terrianna Emerson, PA-C

Terrianna Emerson, PA-C, joined Proliance Orthopedic Associates in 2026 and brings a depth of expertise to our team. Terrianna currently works in both our Renton and Covington clinic locations.

To book an appointment with Terrianna, click the link below!

Book An Appointment
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Gian Kho, PA-C

Gian Kho, PA-C is an orthopedic Physician Assistant working with the sports medicine team, where he is dedicated to helping patients recover from injury and return to active, healthy lifestyles.

To book an appointment with Gian, click the link below!

Book An Appointment

UNMATCHED
SPECIALIZED
CARE

Find the care you need, when and where you need it, with the region's most comprehensive orthopedic care.

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Relief for Chronic Back Pain



At Proliance Orthopedic Associates, we’re proud to provide compassionate, patient-centered orthopedic care that helps you get back to doing what you love. In this video, Dr. Gregorio shares how our team combines advanced techniques, surgical precision, and personalized treatment to restore mobility and improve quality of life.
Doctor explaining spine model to female patient in a bright office with window blinds and greenery outside.

Overcoming Debilitating Neck Pain



When pain limits your movement, every step can feel uncertain. In this video, Alicia shares how the specialists at Proliance Orthopedic Associates helped her return to an active, fulfilling life through expert orthopedic care and genuine compassion.
Orthopedic doctor in scrubs consulting a seated patient in a modern clinic room with Proliance logo visible.

A Surgery Center with Care Built Around You



At our Ambulatory Surgery Center (ASC), advanced technology meets personalized care. Our board-certified surgeons and dedicated staff deliver world-class orthopedic procedures in a comfortable, patient-focused environment — helping you heal faster and return to the activities you love.

HELPFUL RESOURCES

PATIENT SUCCESS STORIES

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Dear Dr. Barrett,Thank you for taking my husband under your care and facilitating a very successful left total hip replacement outcome.During his follow-up visit you asked him how he viewed his recovery with the anterior approach.  His response...

- Wendy

In June 2010, I had surgery on my lower back. Until then, I was in serious and debilitating constant pain and had been for many years. I was on large dosages of pain meds that only took the edge off of the pain I was experiencing. The meds were...

- Lynne

// Jason H. Thompson, M.D.

From the beginning to end, the staff associated with Dr. Shrivastava and he himself have put me at ease, spent the time needed to answer questions and made sure the surgery was successful.  He was patient and kind, answering any and all...

- Alice

// Niket Shrivastava, M.D.

Dr. Cero has successfully operated on my youngest daughter Rebecca, my wife Lyn, and me on five  occasions. I had three “industrial incidents” that created much pain in my left knee on one occasion and my right knee on 2 occasions. After...

- James

Cliff, a VOA patient of Dr. Barrett who underwent bilateral knee replacements has documented his process via social media. Below is a video of Cliff’s progress 4 days after surgery. Yes, 4 days!Cliff made another video 12 days later. In...

- Cliff

Dr. Veith,Thank you for the wonderful experience of being in your care. It is so important to have a surgeon you can trust, and from the moment I first met you, I knew I was in expert hands. You not only knew what you were doing, but you spent a...

- Alison

Dear Doctor Arntz,I have finished my course with Christine and Jan at the Kent gymnasium center. What superb and sensitive therapists they are! Never a moment wasted in trying to discern what to do, using my right side and shoulder. They already...

- Herb Coursey

// Craig T. Arntz, M.D.

Dr. Shrivastava is very polite, caring, and positive.  I feel that he is truly concerned about my well-being. Jeannie (his medical assistant) is always cheerful and helpful, she is very efficient too. Since coming to Proliance Orthopedic...

- Margaret

// Niket Shrivastava, M.D.

I first injured my shoulder when I was lifting an electric motor. I felt a pop and immediate pain. The pain was so limiting, I knew I really injured my shoulder. At my first visit with Dr. Merritt, I was very impressed. He really listened to me...

- Mark

// Andrew L. Merritt, M.D.

Anterior approach patient Largo, 67, received hip replacement surgery from POA surgeon Dr. William Barrett. After 5-6 years of knee and back pain, Largo’s hip became a problem. Dr. Barrett had performed orthopedic surgery on her husband and...

- POA Patient Largo