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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.

OUR APPROACH TO ASC CARE

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!

What Sets Us Apart

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!

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Introducing Our Newest Providers

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Matthew Lyons, MD

Matthew Lyons, joins Proliance Orthopedic Associates in July, 2026 and brings a depth of expertise to our Shoulder and Sports Medicine teams. Dr. Lyons currently works in both our Renton and Maple Valley clinic locations.

To book an appointment with Dr. Lyons, click the link below!

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Tim Stensby, PT

Tim provides care for a wide range of conditions and has experience working with student athletes, including enhancing running techniques for track and field participants.

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

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UNMATCHED
SPECIALIZED
CARE

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

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.

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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.

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

I came into Proliance Orthopedic Associates to see Dr. Shrivastava because I was unable to lift anything more than a couple of pounds without severe pain in my thumbs. Dr. Shrivastava was very caring and professional. He explained every option...

- Nancy

// Niket Shrivastava, M.D.

Dear Dr. Arntz,I am writing this letter to thank you for your total shoulder replacement surgery you performed on Oct 25, 2012.Before the surgery I was in pain all the time. I had trouble sleeping at night and doing simple household chores was...

- Robert

// Craig T. Arntz, M.D.

I had my right hip replaced 7 weeks ago with Dr. Alton and I am very pleased. I came to see Dr. Alton at Proliance Orthopedic Associates because my right hip kept dislocating and it was extremely painful. My hip dislocated 4 times in 8 months,...

- Janice

// Timothy B. Alton, M.D.

Dear Dr. Howlett,I have had many surgeries, but I have seldom had the care that you took to explain the process I would go through. After the surgery, when I saw the X-rays, and the incision, I could tell that you had done an excellent job. More...

- Dawn

// John Howlett, M.D.

Over the years, Pauline has had four surgeries with Proliance Orthopedic Associates orthopedic physician Dr. Craig Arntz. She has had two hand surgeries, as well as both right and left shoulder surgery. She discusses how she is virtually...

- Pauline

// Craig T. Arntz, M.D.

In 1984, at age 3, I broke my arm badly after I fell off my swing set. No one would ever know I had compartment syndrome, multiple surgeries, and almost lost the use of my right arm. Our pastor and my family prayed over my arm as talks of...

- Noelle

“I am 64 years of age and on February 21, 2012 I had an Anterior Approach Total Hip Replacement at Valley Medical Center. Choosing the right orthopedic surgeon to me was very important to a successful surgery and recovery. My primary...

- Sherrie

Dear Dr. Barrett,I just got back from my Physical Therapy session. I walked in, and I walked out. The other day, I stood at a window, (without having to use a walking aid or lean on someone) and watched the world go by. (I don’t remember the...

- Deb

The surgeries I received in 2016 were a major shoulder surgery from Dr. Arntz in April and a total knee replacement in June by Dr. Merritt. I was referred by Dr. David Sweiger who took the time and interest to try to help me. So glad I switched...

- Jay S.

// Andrew L. Merritt, 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