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Brian T. O’Neill, MD

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Orthopedic Surgery, Board Certified Sports Medicine Subspecialty Certification Area of Focus in Direct Anterior Hip Replacement & Knee Replacement

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Areas of Focus

Hip Care
Knee Care
Sports Medicine

Practice Overview

Brian T. O’Neill, MD, is a board certified orthopedic surgeon with a subspecialty certification in Sports Medicine. His surgical interests focus on hip and knee replacements, including revision surgery. Dr. O’Neill’s special area of expertise is the Direct Anterior Hip Replacement, as he has performed over 1200 Direct Anterior Hip Replacement surgeries. He currently serves as a teaching consultant for Depuy Orthopedics, training visiting surgeons from the upper Midwest in this technique.  Dr. O’Neill has experience with hip resurfacing, including the Birmingham Hip Resurfacing (BHR) system. He has been the Director of the North Memorial Joint Replacement Center since its inception in 2008.

Dr. O’Neill has an active trauma and fracture care practice, as well as sports medicine. His professional responsibilities also include service on the Twin Cities Orthopedics Board of Governors and Executive Committee.

Dr. O’Neill has two teenage boys, and as a result, spends many hours at hockey rinks, ski hills, football games and lacrosse fields. He also enjoys time at the lake, as well as competing in the Escape from Alcatraz Triathlon annually.

Clinical Interest

Hip Care, including Anterior Approach Hip Replacement, Hip Joint Revision, Hip Resurfacing and Hip Joint Replacement

Knee Care, including Knee Joint Replacement and Knee Joint Revision

Sports Medicine


Board Certified, American Board of Orthopedic Surgery
Subspecialty Certification in Sports Medicine

Mayo Clinic

Medical Degree
Mayo Clinic

Hospital & Surgery Center Affiliations

Fairview – Maple Grove Surgery Center
Maple Grove Hospital
North Memorial Maple Grove Same-day Surgery Center*
North Memorial Medical Center*
West Health Same Day Surgery Center

*Dr. O’Neill is the Birmingham Hip Replacement physician of choice at North Memorial Medical Center.

Professional Affiliations

American Academy of Orthopaedic Surgeons
American Association of Hip & Knee Surgeons
Director of North Memorial Joint Replacement Center (2008 – Present)
Mid-America Orthopaedic Association
Minnesota Orthopaedic Society
Twin Cities Orthopedics Board of Governors & Executive Committee

Achievements and Awards

Voted “Best Doctor” in Minnesota Monthly (2016)
Dr. O’Neill was recognized by Medtronic Advanced Energy as a 2013 Advanced Energy Surgeon of the Year.


Jennifer Greseth, PA-C
Certified Physician Assistant

Patient Testimonials

March 14, 2018

Cheryl B.

Met Dr. O’Neill many years ago and he has provided care on both knees from start to finish. Dr O’Neill, Bethany and Jen have been an amazing staff to work with. My life has changed with 2 brand new knees! The physical therapy department, Kyle and Eric were a team that helped me regain my strength and worked with me to get through exercises that were not always pleasant, but necessary to get me back on the road to recovery! I never hesitate to refer students, friends and family to TCO for orthopedic injuries. For any friends with knee issues, I guide them to Dr. Brian O’Neill as the go to doctor! Thank you TCO for a life changing experience.

Sincerely, Cheryl B.

October 28, 2017


I can’t believe how life-changing this procedure was for me. I went from virtually not being able to walk to walking a mile within 10 days of the operation! This is miraculous and I am truly grateful to Dr. Brian O’Neill.

October 11, 2017

Otto N.

Each time I am in Dr. O’Neill’s care, I get the feeling I am his only patient.  He and his entire staff are completely patient centered. You can rest assured that when Dr. O’Neill performs surgery, it will be done perfectly.  He has performed knee and hip replacement surgery on several of my friends and neighbors, and they all feel the same way.

July 21, 2017

Denice H.

My experience with Twin Cities Orthopedics was wonderful. I was unable to work due to my hip and Dr. Brian O’Neill took care of my hip replacement. Surgery was done at West Health surgery. Interlude was great! The whole experience was very organized. EXCEL program was the best. I am now back working.

January 31, 2017

Bill W.

I first met Dr. O’Neill in the Fall of 2014.  I was having problems with my right hip. He did a total anterior hip replacement on Feb. 26th, 2015.

I had grade 4 osteoarthritis diagnosis in my left knee last year from old football injuries. I had a total knee replacement on Dec. 20th.

Both surgeries went well.  The hip was a bit complex as my hip issue stemmed from an osteoid osteoma removed back when I was age 16 (45 years ago). There was a lot of buried scar tissue.

I am so grateful to Dr. O’Neill and his team. The skills and experience of Dr. O’Neill, I believe, compete on a very high level. The service provided to me by him and his team was impeccable. I ask a million questions!

November 8, 2016

Gary R.

I had a hip replacement over 6 years ago and have had problems with the hip ever since.  I went to about ten different orthopedic surgeons to try and figure out what was wrong and nobody could figure out what the problem was.  I went to Dr. O’Neill and he determined what the problem was and performed a hip revision in April 2016.  I still have a little muscle soreness but the hip is much improved from before.  Unfortunately, I was unable to have the anterior approach performed but a number of people I know did have that procedure with Dr. O’Neill and they had excellent results.  Also, the staff at North Memorial were superb.

September 1, 2016

Fred K.

I am another very satisfied patient of Dr. O’Neill‘s. Since my surgery a little over a year ago I have recommended Dr. O’Neill to a half dozen friends who are also in need of a replacement hip. He is the best!

August 19, 2016

Randy W.

Randy Wittman, former NBA player and coach, had been experiencing continual knee and hip pain for 20-plus years before he came to Twin Cities Orthopedics’ Brian O’Neill. Dr. O’Neill performed hip surgery for Randy, and then a knee replacement 6 weeks later.

With help from TCO’s EXCEL Program and Dr. O’Neill, Randy was able to return to his regular lifestyle, traveling, playing golf, and walking without pain. “I’ve gone through a lot of surgeries—back, three knee replacement operations—and the EXCEL Program was the best. It wasn’t like being in a hospital. I went from the surgery to a private suite, and was connected to a nurse for the whole process of both my hip and kneethat nurse is like a sister to me now,” says Wittman. “And for insurance and billing, you get one bill. That’s it, at the end of the process. It made everything so much easier for me to use the EXCEL Program.”

*Randy Wittman’s story was featured in the September ’16 Issue of MPLS St. Paul Magazine. See more here

August 10, 2016

Lyn H.

Bill H., my husband, had a total left knee done in April of 2015 and then he had his right knee done in January of 2016.  He is back on his bicycle and did his first Tour de Tonka last Saturday.  Bill just recently retired from nursing (he had a 40 year career in pulmonary and critical care/trauma) and I am also a nurse, so we understand how extraordinary his experience was and how well he has progressed. As Bill’s wife, I am just thrilled with the outcome of his surgeries.  Dr. O’Neill and his team gave him back his mobility and enhanced his quality of life.

July 11, 2016

Sidney J.

The hip replacement surgery went better than I could have ever expected, just like Dr. O’Neill said it would. Very impressed with every single staff member and the EXCEL Program. It was great. I have referred a friend who took another friend with her. That is how much I believe in your program.

July 11, 2016

Jennifer K.

I had been seeing Dr. Brian O’Neill for several years for arthritis in my knee. I finally reached the point where it made sense to schedule my TKA surgery, and I was so pleased when Dr. O’Neill suggested the EXCEL Program. Knowing that infection is a serious risk with the surgery, and also knowing that the risk of contracting an infection in the hospital was even higher, I was ecstatic to find out that I could avoid hospitalization altogether. I was also thrilled to be given the opportunity to recuperate in a non-hospital setting that wasn’t a transitional care facility.

The entire experience was positive. The staff was amazing. My primary care nurse, Ashley Swenson, was fantastic. She was supportive and gave me all the information I needed in a way that was respectful and informational. Her care during my stay at the EXCEL suites couldn’t have been better, as well as the PT. I so much appreciated the comfortable environment that didn’t feel like a clinical setting. It was so helpful to have the physical therapy room right across the hall, and to be able to work with the PT during my stay in an environment that was so inviting. Ashley’s discharge instructions were thorough and easy to understand. She was even willing to talk with me and respond to emails following my surgery, which was so appreciated and helpful.

Marni Gorowsky, my EXCEL RN contact, was an absolute angel throughout my recuperation after I left the EXCEL facility. I cannot overly express how incredibly comforting, helpful and essential it was to be able to email Marni throughout my recovery. I had the added hassle and discomfort of coming down with severe bronchitis at the same time, and Marni’s coaching and advice helped me and my husband through some pretty dark hours. She allayed my fears and gave me fantastic direction on how to manage my pain, swelling, anemia and general recovery.

I honestly cannot imagine going through the TKA experience any other way. And, finally, the PT experience at the TCO PT office with Seth Engberg was equally positive. Seth personalized my PT so that I always felt my unique physical abilities were taken into account. I was adamant about increasing my strength and range of motion, and Seth worked with me to find the best exercises that fit my personal goals.

It has been six months since my surgery. While I have to say it was by far the physically most difficult and painful thing I have ever experienced, I couldn’t be happier with the outcome. I have my full range of motion back, far beyond what I had hoped. My knee is less swollen than it has been in many years. I am virtually pain-free and drug-free. I rarely, if at all, even take an ibuprofen, where it previously was part of my regular “diet” along with much stronger drugs.

I am golfing, biking, walking, and back to work at a much higher level of physical stamina than before. And I do believe that Dr O’Neill’s elegant work and the outstanding care model of the EXCEL Program are largely responsible. I’ve spoken to other TKA patients who did not have any where near the positive recovery experience that I have had.

Thank you Dr. Brian O’Neill, TCO, Ashley, Marni, and Seth! Keep doing what you are doing.

July 11, 2016

Julie Q.

Who’d want to have surgery again?
DON’T point a finger at me
for once was enough
till the pain was so tough
if I had one more hip, I’d do three!

I’m thankful for Dr. O’Neill
who opened me up once before
with a saw and a chisel
my blood, it did drizzle
and my hip, he did then restore!

Oh, hippity doo dah day
the “Sunshine” is bright and intense!
Hip Two has been done
and now I can run
and stand in my own defense!

The tools in the surgeons’ hands
plus such gifted use of recall
since the brains in his head
with “study” were fed
and our God created it all!

Thank you dear Lord for this doc
you’ve so blessed him with talents and gifts
as he’s shared all these skills
one now needs less pills
NO PAIN, thus their spirit uplifts!

A new person I now have become
and old person, not anymore!
This doctor has given
new life that’s now driven
A life that he thus did restore!

A man’s life is much like a river
God can mold it to twist and to turn
If he follows God’s leading
his skills thus exceeding
yet he’s forever still open to learn!

May our focus be less on the material
for all things soon wither and die
but the gifts from above
are given in love
to extend humanity’s cry!

Lord bless this dear doctor his life
and continue to fill and restore
his pep and his skill
along with goodwill
to share with a hundredfold more!

Two hip poems I thus now have written
my surgeries have come to an end
these poems are sincere
about a surgeon’s career
and a surgeon I still recommend!

June 1, 2016

Faye B.

I am back again after my second hip replacement with Dr. Brian O’Neill. This is also my second testimonial for him. Although I wasn’t looking for more surgery, I knew my other hip was failing like my right one had done earlier. Once again Dr. O’Neill did an outstanding job. I came home the next day and recovery was a breeze. The pain was gone immediately. His anterior approach makes recovery so much easier. Some of my acquaintances have had the posterior approach and still suffer and hurt. I had my surgery at the Maple Grove Hospital and would also recommend that facility. I highly recommend Dr. O’Neill. Thank you for giving me back the ability to be able to walk and move with ease.

May 27, 2016

Mike D.

I should have written this sooner. It has been almost a year since my hip replacement surgery and I just wanted to say that Dr. Brian O’Neill did an amazing job. His type of hip replacement (anterior approach) is less invasive and thus, I felt, contributed to a quicker recovery time for me. 3-4 hours after surgery I took a short walk with a walker. I was discharged the next day after my physical therapy and went home using only a cane. I took just two weeks off of work (my decision) and was walking without my cane the second day of work. My hip has been great ever since. I am able to walk 18 holes of golf and couldn’t do that before surgery. Before my decision to have hip surgery I was a 62 year-old man walking like a 92 year-old and now I feel as good as new and often wonder why I waited so long.
I also wanted to mention that his coordinator Bethany and all the staff and nurses at Maple Grove Hospital were fantastic. It was a pleasant experience.
In all I highly recommend Dr. O’Neill, his staff, and Maple Grove Hospital.

May 10, 2016

Craig S.

I returned home this morning from my right hip replacement done by Dr. Brian O’Neill yesterday morning. Having already filled out a survey for the entire program and given it high marks in all regards, I felt I needed to give an additional shout out to my Excel nurses, in particular Ashley. 

She is an amazing combination of encouragement, calm and concern. She could handle the “business at hand” and also some light-hearted conversation. She met my wife and daughters who also were impressed with her. She is a definite asset to your program.

Many thanks to all involved in the program, and especially to Ashley, for making my experience a truly awesome one!

April 22, 2016

Angie C.

I had my right knee done March 2nd, 2015, and my left knee March 7th, 2016, at the Maple Grove Hospital. It was a good experience. The whole staff was very caring and helpful in my speedy recovery. I had a positive attitude that everything was going to be okay. I am still doing my exercises daily. Thank you.

February 8, 2016

Janelle K.

I haven’t felt this good in years and finally have my life back. According to my family, friends, and neighbors, my recovery was incredible and amazing. The neighbors saw me walking to the corner when I got the home the day after surgery and around the block the third day after surgery. By the fourth day post-surgery I was shopping with a friend. I used a walker until I came home from that shopping trip, then decided I didn’t need it and went to a cane for a few days. My surgery was June 15; by the middle of July I marched in the Aquatennial Parade and went hiking in the Grand Canyon the beginning of August. I haven’t felt one twinge of pain since I went in for surgery and had stopped all pain medicine after four days.

A woman from church encouraged me to see Dr. Brian O’Neill at Twin Cities Orthopedics, where she works. She told me about the great results his patients had and that most came to their two week checkup walking normally. I had the anterior approach total hip replacement surgery. I was very pleased with the information I was given to prepare myself for surgery. The class was helpful also, not only for me but for my husband to know what to expect after surgery. I found that the anterior approach had much fewer restrictions during recovery. I cannot say enough about the level of care I received, as well as the friendliness of everyone. I won’t hesitate to have the same surgery on my other hip.

January 28, 2016

Jennifer K.

I wanted to extend my sincere appreciation for the care and treatment for my total knee arthroplasty I received from Dr. O’Neill and his team. I couldn’t be happier with the results!
I am so glad that you recommended the EXCEL Program. Everything about that program was positive, and I can’t help but attribute my positive recovery to Dr. O’Neill‘s skill and that program. Coming to the end of week seven, my range of motion is normal—better than expected. I’m at least 0 to 140°, and being an over-achiever, I’m working towards -2 to 145°. The swelling in my knee hasn’t been this mild for many years. I’m doing exercises I had given up, like squats and lunges, and back on the treadmill. I can’t wait to get outside and back into my fitness walking, golf and gardening!

November 16, 2015

Mary W.

My hip replacement experience was excellent and life changing. Prior to surgery I had significant pain that limited my mobility and restricted me from the activities I enjoy as well as limited my ability to run my business. The pain initiated in my hip, but my back and right knee were also in pain. It was hard for me to believe that at just 61 years arthritis was to a point that I needed replacement. I also didn’t believe that replacing my hip would resolve my back and knee pain, but it did. I first consulted my general practitioner and on advice of a doctor within my insurance coverage, I had a steroid injection as a first step. With no improvement, I researched options for hip replacement, information on procedures and chose Dr. Brian O’Neill at TCO.

My experience was exceptional from the beginning through my final re-check. From a basic patient perspective, I had no long waits, had my questions answered and felt that Dr. Brian O’Neill listened to my concerns. The surgery was fast, the experience at the Interlude Center was fantastic, and best of all I am completely out of pain and back to a very active, pain free life.

Details that worked well for me:

– I appreciate that surgery was scheduled early in the morning. I had minimal general anesthetic issues.
– The bundled billing and ability to pre-pay was a very convenient option. It is also helpful as a patient to have one contact person should there have been a question on the billing.
– The education meeting with the TCO/Excel nurse Marni was very helpful to know what to expect.
– The printed booklet was helpful as it is easy to forget details.
– Recovering in the Interlude Center through the Excel program was a perfect after surgery experience. Private room, private nurses, physical therapy and a follow-up with an internist gave me access to care in one package and eliminated the chaos that can come with a hospital experience.
– The nurses that cared for me were wonderful and well suited to that kind of care.
– The room at the Interlude Center was great-it is nice to be surrounded by comfort while being focused on recovery.

I have only 2 recommendations based on my experience. It would be helpful to receive a chart or spreadsheet that scheduled the pain medications to be taken at home. I was familiar with the drugs and the nurses educated me, but for some patients this could be confusing and easy to forget what to take and when. There was a written list of medications prescribed, but not a specific schedule outlining how and when to take the meds.

The other recommendation is a printed handout from the therapist with pictures of the Phase 1 and Phase 2 exercises. Even though I could have used my laptop to access the videos, I created hard copies of exercises and included a chart of completion to make it easier to get it done.

I rate my experience A++. I would be giving my testimony in person but I am celebrating my 39th wedding anniversary with my husband in Florida. We walk 4 miles on the beach each morning and that was my goal when scheduling the surgery in early August. Life is good, thank you Twin Cities Orthopedic team!

December 10, 2014

Roger A.

Thank you for the opportunity to give you my comment on my procedures. The results of my new hips could not have been better. North Memorial, all of the nurses, and Dr. Brian O’Neill were the best. Both times, my progress in healing was so fast, after 12 to 14 days I was walking without even a cane. I never took the pain medication because I never needed them. My hips were one year apart and the second one was about a year and a half ago. I have been pain free, no problems at all. So again, I thank all those involved in resolving me to a pain free life. My wife has two new knees and our daughter has a new hip with the same results from Dr. Brian O’Neill. We couldn’t be more pleased. Thank you all. 

December 2, 2014

Rose Marie G.

Twice Dr. Brian O’Neill has given me a new life. In 2003 he performed my knee surgery and in 2014 he performed my hip surgery. Each time I was what I was calling “given the miracle of walking again.” Each surgery turned out to be so successful. Thank you Dr. O’Neill. I would refer him to everyone who is in need of surgery. Thank you for allowing me to share. 

November 24, 2014

Faye B.

I was in disbelief when my doctor confirmed after an x-Ray that I had no hip joint space left on my right hip and precious little on the left. That explained my intense pain in my hip and groin, my clicking as I bent forward (bone on bone) and my leg giving out with certain movements. No one in my family history had hip issues. Hip surgery meant I had work to do. I read all I could find and questioned everyone I could on their replacement experience. I heard horror stories and my first visit to a surgeon left me in tears. I needed a second opinion.I had heard and read that the anterior approach was the easiest in terms of recovery. One of my acquaintances who had both her hips done told me her first surgery was awful in terms of recovery. She told me Dr. Brian  O’Neill did her other hip and it was done with the anterior approach and she said she had done a ton of research, viewed videos, went to classes and ultimately chose Dr. O’Neill. So, I made an appointment.When I arrived I was told he was running behind and I had a fairly early appointment. I did appreciate their honesty so I waited. I sat next to a woman probably five years older than my 67 years. We talked and she said she was there for a follow up appointment after her hip replacement. I thought how lucky for her she was way ahead of me. She had had Dr. O’Neill and told me what success she had with her surgery.When I met Dr. O’Neill, I understood why he was running late that day. He spent time with me, explained everything, gave me options, showed me x-rays (before and after) and although I was fighting surgery, I knew I would be okay under his care.I shed tears in his office and on the day of surgery. The hospital gives you a huge three ring notebook to read. It spoke of donating blood “just in case” and raised more questions for me. Dr. O’Neill helped me check off all my concerns and questions. I always came to see him, even after the surgery, with my list of uncertainties. He assured me he did hundreds of these surgeries every year but this was my first. I reminded him of that.May 5, 2014 came and off we went. Everyone was so nice but it was me having surgery. They told me I would be asleep before I left the room my family and I were in and I reminded them as we started out that I was still awake. Some time later, I woke up–DONE.The day went by, a few visitors came (family) and my husband stayed the night. I was at the Maple Grove Hospital and can’t say enough good things about that hospital. I walked the halls with a walker that night and breathed a sigh of relief. I did have pain that night but morning came and I managed to freshen up in the bathroom, get dressed, fix my hair to look as presentable as I could the day after surgery.Dr. O’Neill was in early to check on me. I was sitting in a chair and he looked at me and said I looked like I was ready to go home. I said “yes”. He said, “then go”. WHAT? He said if I could do the physical therapy class and do the steps, I could go home. Who ever heard of going home the day after hip replacement surgery, but I did.Recovery was in my hands–do the exercises, move, ice the hip and come back the end of May. I was free to call him or his assistant with any questions. I had only three formal physical therapy sessions and always exceeded the goals set for me.My follow up visits with Dr. O’Neill were so comforting. He pushed me to give up the walker and the cane. He said at my last visit he would see me in two years but I know he knows my other hip is now wearing thin and won’t make two years. I am thinking probably another May surgery. This time I am more prepared having been through it once. While not looking forward to it, I know I have the best surgeon and would and have recommended Dr. O’Neill to anyone with hip replacement surgery in their future.Thank you Dr. O’Neill.

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