I had both knees replaced 7 weeks apart and both were a huge success. From Dr Sima, his staff and the Posada Surgery Center all were extremely approachable, informative and caring to no end. All the support scheduled by Dr Sima at home and external PT helped recovery and supported my every need. Many many thanks to all. read more

William F Sima , MD - Left knee in January and right knee March. - Orthopedists Near Me - Templeton, California

I was back again to get the results of my SI joint pain pelvic Xrays, and to have a cortisone shot in right hip Bersa for hip pain while walking. Dr Sima is the best! He is right to the point and tells you the facts, but in a friendly way. He made me a referral to a pain specialist for the SI joint pain as there is nothing he can do for that. My Xrays show arthritis there. I had a cortisone shot in the hip which was done quickly and nearly pain free. I have had 3 surgeries with Dr. Sima, carpal tunnel, and both shoulders. I will keep coming back for quality care. read more

Dr Sima performed a hip replacement on me this week. A superb surgeon, from Assessment to the procedure and follow up, it was a very positive experience and am so grateful for him giving my life back. Dr Sima took the time to fully explain what was needed, how to prepare, the.actual procedure was quick and amazing what skill he showed. My recovery has been quick and relatively painless. I highly recommend Dr. Sima and his staff if you are in need of orthopedic surgeon. read more

I just had a Total Right Hip Replacement on 10/28/25. It was 100% successful, thanks to Dr. William Sima; an Orthopedic Surgeon in Templeton Ca. Dr. Sima is highly qualified in hip replacements; has years of extensive experience and uses the latest methods and equipment. He is professional, but you can also tell he is passionate about being able to improve the quality of his patients lives. He was straightforward when providing information to me but he also cared about how I was feeling; pain, etc. Dr. Sima was always happy to answer all my questions at every appt. He would also provide extensive written material after every appt to add detail, guidance and next steps for me. His medical team are also highly qualified, professional and very helpful. His office is very clean, well run with a friendly, polite and efficient staff. They were also happy to get answers to my many questions. I would highly recommend Dr. William Sima to anyone in need of a hip replacement! Carol in Creston, Ca read more

Dr Sima replaced my hip which was bone on bone in the joint due to osteoarthritis. He explained the procedure and gave me confidence. Dr Sima's post surgery protocol proved excellent in advancing my recovery. The office staff is friendly and helpful. The surgery was performed at the outpatient surgery center next to Dr Sima's office. The staff is professional and gives confidence in the preoperative procedure. After the surgery, I was pleased Awaking in the post operative area. I walked to my car using a walker. Overall Dr Sima and his team are the only choice. Chris M read more

Following your comment to mine: So you knew I only had a few meds from ER to last me until Mon yet failed to schedule me sooner than Thurs. I mentioned to your assistant I was worried that you would not prescribe to me without seeing me and her words were, "Don't worry -- I'll talk to Dr Sima." At the end of the day on Mon your office called back to tell me to get meds elsewhere, knowing it was too late to schedule with another doctor. After 30 years and several surgeries together of my kids and myself you knew I never abuse drugs (I worked as a drug counselor in fact with my MS degree) -- a broken kneecap obviously calls for initial pain medication. And what does all this have to do with canceling my appt with your PA wife on Thurs and saying I had to find another doctor as you would no longer treat me? No explanation! The irony is I was the one who first encouraged you to do stem cell and copied a folder full of research material to read re: it. How quickly we forget those supportive of us. read more

Dr. Sima is a excellent doctor and surgeon. In all the operations that I've ever had in my life, he is stood by what he did and he was excellent. I got to go back out and drive truck after he did my knee in 2004. I went back to on April 3 of 2025 and he helped me out a lot. He brought it to my attention on something that I was experiencing right now, I trust that man out of all the doctors I've run across. He's the best. read more

From scheduling to post op, everyone involved showed compassion, and commitment to quality care. Dr. Sima's enthusiasm and confidence that he could turn my husband's painful situation around and get him out of a wheelchair was so inspiring as we were at a low point in a year long saga of painful hip and health issues, where the surgeon we originally scheduled with at a different office not associated with Posada team, took no active interest in the steps leading to surgery. It all turned around when we switched to Dr. Sima! SO thankful as the hip replacement surgery was scheduled immediately and was a great success. Three months later and my husband is back to a normal routine. read more

Dr. Sima and his team replaced my right hip in April. So amazing, you can check in to his Posada Ambulatory Surgery Center, place yourself in the care of friendly, skilled staff, wake up , walk out, climb into your truck and go home! My hip had been so painful I had been using a walker for months. He has also replaced my left hip and repaired my broken wrist. Both procedures were a few years ago. Totally successful. My first experience at the Posada Surgery. My wrist required surgery and some hardware. As soon as the cast was off, hip surgery was scheduled. My son was getting married in June and I needed to be able dance at his wedding! Everyone was so helpful! Paperwork, lab work, etc., was like everyone was in overdrive! All went perfect because of the caring, skilled help I received from Dr. Sima, his office staff, nurses, assistants , and interns. I was post-op and healed in plenty of time. So thankful for all the simple things, like being able to get in and out of bed, put your shoes on, put your pants on without having to sit down. Such everyday things. Our community is so very blessed to have such a compassionate, highly skilled surgeon. My primary care Doctor told me Dr. Sima is the best. I agree. read more

Dr. Sima is the best. If you want incredible results, go see him! My knee surgery went super smooth, and I am able to do any activity as a result of his expertise! read more

Dr. Sima performed a rather complicated hip replacement surgery on me and I was amazed. Literally walked to my awaiting car 5 hours post surgery with aid of a walker. Four days post operation rode five semi rolling miles on my road bike with little discomfort and did another 12 the following day The surgery center he works out of next to his office is also fantastic and all his and the surgery staff are first rate across the board. Because of the complicated nature of my hip replacement I strongly considered going to Stanford or LA, I am so glad I chose Dr. Sima. Thank you and your very professional staff and the Posada Surgery Center read more

William F Sima , MD - A very messed up hip before replacement - Orthopedists Near Me - Templeton, California

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I need more stars please.......... Dr.Bill and staff at both offices are awesome .Just had my second joint replacement and am most pleased. I think the team goes above and beyond. A pleasure to work with such professionals. Oh and I got a personal evening call from Doc checking on me.... Ill be baaaack. read more

I received my second knee replacement surgery from Dr. Sima on January 27 of this year in the outpatient office. I can't say enough good things about Dr. Sima and staff. The whole process was very well organized, planned and executed. I was given a pre surgery regimen that I believe directly benefited and Expedited my healing process. Although I was a little nervous about having the surgery as an outpatient, my fears were well assuaged with plenty of pre-planning and extra preparation prior to surgery. Both my husband and I have had knee replacements with Dr. Sima, and we would never go anywhere else! Highly recommend for a professional, compassionate and efficient surgery!!! From Gerrie Zimmer (surgery on 1-27-21) read more

First appt this doc left me sitting for over an hour in his exam room. No one came in to say he's running late. My time is just as valuable as yours, doc. They called and apologized and I though great- will give another try. Went in discussed the appropriate Treatment plan. Told him both knees. He called in medication for only one and when I asked to have the other one added, office said I needed to come in for another appt. I'm sorry- what!? Pay for another visit when we talked about both knees? Then the office called back and cancelled seeing me as a patient. What a surprise. Totally unprofessional. What a scam read more

Dr. Sima has been fixing all my orthopedic injuries for years, most recently, I underwent Knee surgery, and everything went great! It was an outpatient procedure, and I was walking within a couple of hours after coming out of surgery. He sent me home with this awesome "Game Ready GRPro Cold and Compression Therapy Control Unit", which was a great tool for healing and drug-free pain relief. They have x-ray facilities right there in the office, so you don't have to trapse all over town getting them. That's pretty cool. His staff are very professional, and efficient. Everyone is helpful and polite. Dr. Sima is also quite the photographer. His offices are decorated with some really great photos from local landmarks and wineries. read more

William F Sima , MD - Orthopedists Near Me - Templeton, California

Thought I would have had more answers to my pain and situation not so sure all was done to help me? Maybe on nest visit?

After waiting more than a month to see Dr Sima I went to my appointment yesterday. I was required to print out a 7 page document before going in, in addition I had an interview with an assistant explaining my reason for the visit. But instead of the doctor himself I had another assistant named Jennifer I believe sent in to replace him. She hadn't looked at my paperwork or talked to the previous assistant about why I was there. I think I maybe have a shin split and it's painful but we'll never find out. She was focusing on trying to sell me another knee replacement or maybe stem cell injections or fat cell injections, only trying to run up huge medical bills I guess.. I kept trying to get her to discuss treatment for the shin pain, she told me I should see my regular doctor! Then she said she'd offered me 12 different suggestions that I refused, and walked out! Just to be clear I realize I have arthritis both knees but I was not seeking advice about that since I had a failed knee surgery and would never consider that again. read more

What a wonderful office! Jennifer, Bill, Kim and David are the nicest group! I highly recommend if you want a great medical team!

I own a small business that is my Livelihood.....so when my knee went out and greatly swelled I was very worried. Dr Sima and his PA were so clear and caring and understanding of my needs... thru out this whole process I have felt very heard very understood and never pressured I had surgery today... early in. wonderful nurse who relaxed my very worried nerves... I f there is one word to describe. Kind, Patient, capable oops there's more praise to be had.. On this Thanksgiving... You all will be in our prayers of thanks.... read more

After exhausting entire work comp list of Drs who would see my M.R. I , & say they could not help me or that I needed a reverse shoulder replacement. Not Dr.Sima I am climbing Telephone poles going on 50 ,5yrs later Prior to this Dr Sima repaired my left rotator cuff & Reconstructed my Right knee I just Re-enlisted in the Military!! God Bless Dr.SIMA ! read more

Dr. Sima has to be one of the best orthopedic surgeons in California! From my first visit to his office to my last "check-out" visit were 5-star experiences. Dr. Sima performs the latest and most comprehensive surgical techniques. He has been an orthopedic surgeon for more than 30 years and Is a graduate from one of the best medical schools in the country (Keck School of Medicine at USC). His surgeries are performed at his outpatient surgical center and his medical staff are very caring and professional. My outcome as a patient was absolutely perfect. It was the result of both Dr. Sima's skill as a surgeon and his staff's attention to detail. I highly recommend Dr. Sima to anyone who needs orthopedic surgery and, I believe you can find no better surgeon anywhere. read more

Dr Sima is the best! Staff, Dr, follow up are all top notch. Not a fan of Yelp, but the service I received from Dr Sima and his staff compelled me to jump through the loops to get a 5 star review for Dr Sima and his staff! read more

From the moment I walked through the doors of Dr. Sima's office I was impressed. His staff works hard, very professional, and efficient. Everyone's so helpful and polite. So, with such a well run office I was not surprised meeting Dr. Sima. He's friendly, approachable, and quite a good photographer! He was thorough in his findings. In fact he found an unrelated health issue that demanded immediate attention by my primary. His concern for a stranger was heartwarming and sincere. He didn't miss a bit of information about my treatment options. He covered an array scenarios for my torn meniscus and the healing process. I was well informed. A day after surgery I felt great! I only needed pain meds for the first day! His rehab plan worked miracles! I'm post surgery 6 weeks now. I'm getting stronger everyday. Why, I think I'll take a hike! Great experience all around! read more

Dr. Sima has been my orthopedic surgeon for four years and my last visit was just exemplainitory. has such wonderful bedside manner's and treates patients with loving care and his PA is excellent also I cannot recommend them enough read more

I've had multiple surgeries by Dr. Sima -- he's the greatest. Most recently, I had thumb CMC arthroplasty due to severe osteoarthritis in my CMC joint. My thumb was practically non-functional and caused me a lot of pain in almost all activities involving my hands. As a quilter, I was facing giving up on my favorite pastime. The surgery was about a year ago and it was a pretty long recovery. But today, I have no pain at all, I can do everything I used to do before the arthritis and it is such a relief. I encourage anyone suffering from arthritis in their hands or thumbs to consult Dr. Sima. Cheri Hendrickson read more

Hooray! I just visited Dr. Sima for my last post op visit after six weeks of being confined to a wheelchair or my bed! I am so overjoyed! For the last five years I have had to wear pads, braces, special inserts, PAIN, and as of now I am shocked and pleased to have a normal foot again, thanks to Dr. Sima. Dr. Sima was able to shorten my toes after previous doctors said I would never walk again, with very little pain. Dr. Sima is an intelligent, caring and loving doctor that made me feel right at home, and I have seen many doctors- they all told me to stop walking! Today I am now able to walk on my own, exercise and begin my rehabilitation, I am very thankful on this Thanksgiving for Dr. Sima and all he was able to accomplish for me. read more

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Dr sima and his staff were friendly, helpful, and puntual! I was having shoulder pain and had reached my limit. Dr Sima reviewed the mri and X-ray with me and came up with a plan. Thank you Dr sima read more

If you need total hip replacement, this is the ONLY place you need to go. Dr. Sima is using the anterior approach which makes recovery amazingly quick! There is no damage to the muscles and very few, if any, physical restrictions after the surgery. There is hardly any pain involved. You will be walking within 24 hours of your surgery and going home within a couple of days! By 2 to 3 weeks after surgery, you will forget you even had it done! My leg was actually shortened from walking on it so long, 2 1/2 years while I was trying to find a better approach) and that was able to be totally corrected!! No more limping! No more pain! My surgery was done at Twin Cities Hospital in Templeton, CA, a hospital that earned a "Blue Distinction" from Blue Cross and Blue Shield as a Center of Excellence for Hip and Knee Replacement Surgery. Twin Cities Hospital is the only hospital in my local area that uses the Hana Table which allows for better manipulation, smaller incision and more precise placement of socket and ball joint. read more

Dr. Sima did my left hip replacement in July, 2018, and it went amazingly well. I had it done outpatient, and was walking within a couple of hours after coming out of surgery. He did my right hip replacement in March, 2019, and it went even better! He is quite a good surgeon, and his office is efficient. The only time I really had to wait was when I had bumped the incision and it opened and bled on a Sunday. When I was at physical therapy the next day (the building next door to Dr. Sima's), I was advised to go there to get it checked. So I walked in with no appointment, and had to wait a bit. No big deal! read more

Dr. Sima has replaced both my knees, done surgery on my shoulder, did joint reconstruction on both thumbs and just removed a troublesome bunion from my left foot! I've gone to him over and over during the last 14 years and I've never ever been disappointed in his skill as a surgeon, or his obvious concern for his patients. I've never hesitated to see his PA and all his office staff are amazing. My last surgery experience with bunion removal went just as smoothly as the rest of my procedures with Dr. Sima, and I know that if I have to deal with yet another issue, I'm in good hands and won't hesitate to call him again. He's the best! read more

Surgery unsuccessful and the doctor was usually rude. My arm was worse after the surgery and after 10 months I have constant pain.

Great surgeon. Very knowledgeable and informative. Explained all options before I chose the course of action.

Dr Sima is great. Surgeons tend to have a poor bedside manner. But I thought his was fine. I like facts: what needs repairing, how, and length of recovery. That's exactly what I got. But what I really liked was when he was giving me a shot IN MY KNEE. The needle was deep IN MY KNEE and my phone rang. Since my phone was not in my pocket, the ring was LOUD. Dr Sima, while injecting deep inside my knee, did NOT flinch! That's awesome! Even if everything else was bad, a surgeon with steady hands gets a 5/5. read more

I waited 2 months to get an appointment with Dr. Sima. My appointment was today. After waiting over an hour, I was finally called back only to be told my appointment wasn't with the dr, but the pa (not what I was told when I made the appointment). I then sat in the exam room an additional 30 minutes and still wasn't seen so at that point I left. I will try another surgeon. read more

Dr Sima performed total hip replacement 16 days ago. I am walking perfectly now, after limping for the last 2 years. I went home the same day, no hospital, it was amazing. Thank you to him and his staff. read more

I believe Dr. Sima might be a good doctor - at least, based on some of the reviews I've read. But when I made an appointment to discuss a serious problem with my ankle, I found the Doctor and his staff to be very difficult to communicate with. I actually had TWO appointments with doctor Sima and I don't think my total face-time with him was more than five minutes, total. Just long enough for him to inform me that I need surgery, and when he had an opening for me. After the second visit, I left feeling like I still had a LOT of questions, so I called his office. After three calls, I finally got someone who would at least speak with me but when I asked if I could pose a few questions about my operation to the doctor, the answer was essentially "no". So, I asked about speaking with an assistant who could answer questions. Again - "no". Well, what if I emailed some questions.... "we don't do that". OK.... can I make a third appointment... I'll pay for another appointment if I can use the time to ask a few important questions about this procedure Dr. Sima wants to perform. I was given an appointment date two weeks after the surgery date! Thankfully, I found another doctor that specializes in the type of procedure I need, and she actually uses her words to explain things and answer questions. read more

The staff are less than professional. I was on time for my appt. But was passed up for the person who's appt was later than mine, but she so happened to come in just in front of me. I was unusually qustioned abouty insurance, Medicare, and it was openly discussed therefore everyone in the room could hear, making me very embarrassed. I sat down and waited almost an hour, but was never seen by the doctor. I asked for my records back, before leaving. I realized on the way home, that they didn't give them all back to me. NEVER AGAIN.... BAD STAFFING read more

EXCELLENCE IS IN OUR OWN BACK YARD. No more need to travel hundreds of miles to have a state of the art "anterior" hip replacement. I have just had my right hip replaced by Dr. Sima and I'd like to share some of my thoughts. For those of you who need a new hip and are wondering who should I have do it, let me give you a little insight based on my experience. I wholeheartedly believe that Dr. Sima is by far the best and most knowledgeable surgeon on the Central Coast to do the anterior approach to hip replacement. He was trained in the anterior approach to hip replacement by Dr. Joel Matta, the American Godfather of the procedure, and the Dr. who did my left hip years ago. Dr. Sima's hip replacement was every bit as good as Dr. Matta, his teacher. A little background: About 5 years ago I needed a left hip replacement. I was almost set to have a replacement done by a well know orthopedic surgeon in SLO who did the old fashioned Posterior approach. A friend called me from Los Angeles who told me his x wife just flew into LA for a hip replacement by a wonderful surgeon who was doing a revolutionary new procedure called an "anterior" hip replacement. She was operated on, walking the next day, and flew back to the Carolinas two days after her surgery with no limitations on movement and generally pain free except for the incision which was tender. I went back to this famous SLO orthopedic surgeon who told me it was voodoo surgery and he would do it the old way "posterior". It would take months of limited movement to avoid dislocating the hip. Well, I decided to go to Santa Monica and meet Dr. Joel Matta, the recommended surgeon who was performing miracles with hip replacement by the "anterior" method. Dr. Matta explained why it was so much better. One of the keys was this table which he helped invent to do this procedure. In fact, he could do both hips at the same time with great recovery. The reason no one was doing it on the Central Coast at the time was they didn't have the knowledge or this very expensive table to do the procedure. Dr. Matta replaced my left hip and I was walking and had my wife drive me home to SLO two days after the replacement. Sure, it took some time for the swelling to go down and the incision to heal, but the pain was gone. It was worth going down to L.A. for this new procedure. There is no need to travel 100's of miles to get this new anterior approach. Dr. Sima and Twin Cities have the new equipment and knowledge to do the same "anterior" replacement right here in our own back yard, Templeton. It was every bit as good as Dr. Matta, and in some ways better. Dr. Sima's follow-up, physical therapy regimen and surgical finesse are excellent. I wholeheartedly recommend going to him. The care at Twin Cities Hospital was also excellent. read more

If I could give zero stars I would, why hasn't yelp added that option yet?! Sima has a terrible bedside manner. Treats patients like they're stupid. ALWAYS always always a long wait, whether it is for a consultation, post op check, or follow up. Usually over 45 minute wait. The office uses Posada surgery center, which is the absolute WORST! Estimate was completely off. read more

Dr. Sima is FANTASTIC! He did surgery on my sons ACL and has gone the distance to help him. The night of surgery I had to call in because of the pain my son was in, and Dr Sima was so helpful and even called back twice to check on him. I can't possibly say enough nice things about Dr. Sima. I would definitely recommend him to anyone! He and his staff are the best! read more