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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I want to tell how much I’ve waited for my hand back. To help people, like you do doctor, it means so much to me to use my hand as a helping hand for others. I’ve prayed for this all year. Doing everything one handed, has been challenging.I...

- Marlene – Patient/Friend

POA patient Betty, 89, recently received hip replacement surgery from Dr. Merritt. She details the discomfort that led to her decision to schedule orthopedic surgery and her experience at Proliance Orthopedic Associates. Her peers call her “the...

- POA Patient Betty

// Andrew L. Merritt, M.D.

The anterior approach hip replacement surgery I had was a wonderful experience for me. I suffered from an awful hip with severe pain which bothered me for a long time. I was practically unable to walk. The anterior approach to a total hip...

- Arlene

// Andrew L. Merritt, M.D.

August, 2015As a 64 year old active male who has been in pain for the past couple of years, I scheduled an initial appointment with Dr. Andrew Merritt. I immediately had confidence in his ability to “help” me with getting back to my regular...

- Kenneth

// Andrew L. Merritt, M.D.

Dear Dr. Cero. Our Hero!! I have tried many times to find the words to say how much you have improved George's ability to walk. Every step he takes I think of you with excitement. How can I express our profound gratitude in the future of...

- Gin and George

Today I had an appointment with Dr. Cero. It has been 6 weeks since I had a total knee replacement on my right knee. At this appointment, Dr. Cero was very pleased with my progress and mobility, and lack of pain. The physical therapists are also...

- Willa

I broke my wrist while snowboarding, which is how I met Dr. Howlett. I came into the office for a consultation after I had my cast taken off, and Dr. Howlett recommended surgery. Since surgery was the recommendation, I reluctantly agreed. I was...

- Roy W.

// John Howlett, M.D.

Today marks my one week post op anniversary for my left hip surgery! I am amazed my pain is gone only tenderness in incision site.  I’m an old 70 year retired R.N. and recognize an outstanding medical office-which I found at your office from...

- Sallee

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 a hip replacement in September and am doing great. Dr.Cero and her staff were exceptional. Dr. Cero requested that the surgery and recovery would be a lot better if I was to lose some weight. I took her advice and extended my surgery a few...

- James