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 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!

Book An Appointment
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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!

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.

Doctor in suit explaining spine model to patient inside bright medical office with Proliance logo

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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Thanks from a Mountain ClimberDr. Barrett performed total knee replacements on both of my knees. They are not like original equipment, but they do work well enough for me to do this!

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Proliance Orthopedic Associates and Dr. William Barrett are rare finds in healthcare and surgery.  In my 72 year lifetime, and 50 years as a health care professional, I have a multitude of experiences with doctors, health care systems and...

- B. Noelani Hong

I was referred to Dr. Howe by Dr. Wagner at the UW. I had been seeing Dr. Chapman at UW originally for several years because of my lower back issues. He wanted to do two surgeries a week a part fussing T7 thru S1. I would have lost 40% mobility...

- Karen G.

// Chris R. Howe, M.D.

Dr. Merritt performed a hip replacement on my dad, who was then 90, in the spring of 2015, using the anterior approach.In my opinion, this surgery saved my father’s life. At the time, he was spiraling downhill on several fronts. Because hip...

- Richard B.

// Andrew L. Merritt, 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.

I had degenerative disc in my right hip and suffered for four to five years in pain with the last two or three years being unbearable. I couldn’t tie my shoes, sitting in the car was difficult, and I could no longer participate in yoga classes...

- John

// Andrew L. Merritt, M.D.

All of the staff that I encountered were very helpful.  Never did I feel rushed and whenever I had a question, it was thoroughly answered.  For having surgery, Proliance Orthopedic Associates made it feel the best possible.  Dr. Shrivastava...

- Ted

// Niket Shrivastava, M.D.

My name is Annmari and I am 53.  I have been Dr. Howlett’s patient for a little over 3 years now.  I broke all three bones in my ankle and luckily Dr. Howlett was in the emergency room when I got there and he did my surgery that night.  When...

- Annmari D.

// John Howlett, M.D.

“I was diagnosed with a very sever rotator cuff tear and I was referred to Dr. Arntz from my doctor at MultiCare. I cannot be more thankful and blessed to have had Dr. Arntz perform my surgery. He is so dedicated to doing the best job he...

- Diane

// Craig T. Arntz, M.D.

Dear Dr. Merritt: I am 77 years old and had been fighting a steady decline and use of my right knee due to continuing pain for several years. I tried various treatments that were temporary at best. Several of my friends had gone through a similar...

- Clayton and Joann

// Andrew L. Merritt, M.D.