This chiropractic medical center is truly exceptional. Dr. Grenda is absolutely wonderful, and the staff is equally impressive.
jonathan canela
Mar 2026
I just want to give a big thank you to Dr. Grenda and the team at New Health Medical.
I was dealing with a really bad back injury that caused severe sciatic nerve pain for months. At one point, it got so bad I was basically stuck in bed for weeks. That’s when I reached out to Dr. Grenda.
Between the adjustments, the massages from Mercedes (she’s amazing), and the PRP shots he recommended, things really started to turn around. I ended up doing three rounds of PRP, and honestly, the combination of everything made a huge difference.
I’m finally back to living my normal life again, moving better, and even rebuilding strength in my back.
Super grateful for all the care and attention from Dr. Grenda and his team. I definitely recommend them to anyone dealing with back pain or sciatica.
Ivan Campos
Jan 2026
They don’t release medical records in a timely manner. The attorney’s office requested them in October, 2025 and after over three months they haven’t sent anything yet. No answer to phone calls or responses to multiple emails.
Dawn R.
Oct 2024
My husband and I have been going to New Health Medical for a few years now. We have always been super happy with the many services we are able to get there. Chiropractic, massage therapy and acupuncture. Recently, I threw my back out prior to my daughter's wedding. They were able to work me in and provide the best service I could ever ask for. From the front desk, Kari, is amazing, professional and very commutative. Dr. Grenda always takes his time with us but especially during this time of desperation. Dr. Yoshida worked her magic with Acupunture and cupping . She is incredible, but when the extra mile with me those harder days. Dr. Yoshida also does cupping and really takes her time in knowing one's body and how it reacts. Mercedes has been our massage therapist almost the entire time since starting our journey at this practice. She is one of a kind and displays compassion while being so knowledgeable. She is well versed and has a way with how she performs the therapy. During this time, all I wanted was relief and to enjoy our up coming event pain free. She really is an expert in her field. All three of them are, I don't know how I would have made it without them. They are the perfect team and we are just so grateful. Such a place exists. I am healthier, happier and over all better because of them.
Tami W.
Oct 2023
I have a torn meniscus and Google says acupuncture might help. I saw Dr. Yoshida. She was very knowledgeable, professional and empathetic. She advised me to stop my Spartan races for a while and focus on rehabilitation. I saw her once and I have another appointment coming up. I can't say it works, but I'm not worse. So I'm cautiously optimistic. And it doesn't hurt, it just looks medieval.
Jennifer Solomon
Dec 2022
The BEST! If you are like me and very apprehensive about chiropractors and nervous in general. Trust me that you will be very happy with Dr. Grenda and his staff. He is professional, caring and above all he will heal your pain and ailments. If I could give more than 5 stars, I would.
Dennis Vogt
Aug 2022
I was so happy to find a Gonstead chiropractor. That method is very precise, they take an x-ray on initial treatment then measure you and diagnose where the pain originates from before moving anything. Dr. Grenda is very thorough and precise. I always feel better after seeing him.
Frank “Fran” D
Aug 2022
Years ago I used to suffer from sciatica and what would happen is I'd have a flare up and then over time get better. However over a longer period of time my sciatica whenever it would flare up would get worse and worse. without wanting to go get surgery I didn't know what to do to relieve my pain so I ended up trying a chiropractor and after I went that first time I never had that horrible sciatica pain again. And when I did get a flare up they were much much less painful and eventually went away all together as I continued to get treated with Chiropractic care. The original sciatica pain is completely gone went away after just a few visit.I latee found a Gonstead chiropractor for a different issue and they took the time to take an x-ray and then measure me precisely and make sure they were adjusting what needed to be adjusted and nothing else. My original Johnston chiropractor helped me after a car accident and with other injuries I did to myself over time and each time when I went with consistent care I was able to heal and find relief.About 5 years ago I moved from Minnesota to California and I had to make sure when I moved here that I found a gunstead chiropractor which is Dr Grenda. Dr. Grenda I saw Dr Grenda initially only two times and then I didn't have to see him again because my issue was resolved. unfortunately over the past couple of years I've had a couple of injuries just from carelessness on my part and I've gone back to the doctor Grenda. Because I hadn't been in in so long he took an x-ray to get an updated picture of where my back was at and every time I come in he's very precise to measure to find where I'm having a problem
Erica Hui
Jun 2022
Thanks Dr Grenda and Mirna for helping me to maintain my quality of life. I am a very active person. The back pain started in 2017 has prevented me from doing a lot of activities/ exercises I like. Through periodic adjustment, rehab and massage therapy, my pain is totally under control. I regained my physical ability and active lifestyle.
Erica H.
May 2022
I started to have lower back pain since 2017 and started to see Dr. Grenda in 2018. Through regular adjustment, rehab and massage therapy, my back pain has improved tremendously. I was very desperate when the back pain started since I am a very active person and love exercising. The back pain basically stopped me from doing most of my activities. With Dr. Grenda's help, I was able to regain my ability to do everything I love again. Thanks Doc for helping me to get my quality of life back! Also big thanks to Mirna, the best massage therapist. Her magical hands just untie every knot on my body and help my sore muscles and joints to recover faster after my strenuous activities.
yvonne wallace
This chiropractic medical center is truly exceptional. Dr. Grenda is absolutely wonderful, and the staff is equally impressive.
jonathan canela
I just want to give a big thank you to Dr. Grenda and the team at New Health Medical.
I was dealing with a really bad back injury that caused severe sciatic nerve pain for months. At one point, it got so bad I was basically stuck in bed for weeks. That’s when I reached out to Dr. Grenda.
Between the adjustments, the massages from Mercedes (she’s amazing), and the PRP shots he recommended, things really started to turn around. I ended up doing three rounds of PRP, and honestly, the combination of everything made a huge difference.
I’m finally back to living my normal life again, moving better, and even rebuilding strength in my back.
Super grateful for all the care and attention from Dr. Grenda and his team. I definitely recommend them to anyone dealing with back pain or sciatica.
Ivan Campos
They don’t release medical records in a timely manner. The attorney’s office requested them in October, 2025 and after over three months they haven’t sent anything yet. No answer to phone calls or responses to multiple emails.
Dawn R.
My husband and I have been going to New Health Medical for a few years now. We have always been super happy with the many services we are able to get there. Chiropractic, massage therapy and acupuncture. Recently, I threw my back out prior to my daughter's wedding. They were able to work me in and provide the best service I could ever ask for. From the front desk, Kari, is amazing, professional and very commutative. Dr. Grenda always takes his time with us but especially during this time of desperation. Dr. Yoshida worked her magic with Acupunture and cupping . She is incredible, but when the extra mile with me those harder days. Dr. Yoshida also does cupping and really takes her time in knowing one's body and how it reacts. Mercedes has been our massage therapist almost the entire time since starting our journey at this practice. She is one of a kind and displays compassion while being so knowledgeable. She is well versed and has a way with how she performs the therapy. During this time, all I wanted was relief and to enjoy our up coming event pain free. She really is an expert in her field. All three of them are, I don't know how I would have made it without them. They are the perfect team and we are just so grateful. Such a place exists. I am healthier, happier and over all better because of them.
Tami W.
I have a torn meniscus and Google says acupuncture might help. I saw Dr. Yoshida. She was very knowledgeable, professional and empathetic. She advised me to stop my Spartan races for a while and focus on rehabilitation. I saw her once and I have another appointment coming up. I can't say it works, but I'm not worse. So I'm cautiously optimistic. And it doesn't hurt, it just looks medieval.
Jennifer Solomon
The BEST! If you are like me and very apprehensive about chiropractors and nervous in general. Trust me that you will be very happy with Dr. Grenda and his staff. He is professional, caring and above all he will heal your pain and ailments. If I could give more than 5 stars, I would.
Dennis Vogt
I was so happy to find a Gonstead chiropractor. That method is very precise, they take an x-ray on initial treatment then measure you and diagnose where the pain originates from before moving anything. Dr. Grenda is very thorough and precise. I always feel better after seeing him.
Frank “Fran” D
Years ago I used to suffer from sciatica and what would happen is I'd have a flare up and then over time get better. However over a longer period of time my sciatica whenever it would flare up would get worse and worse. without wanting to go get surgery I didn't know what to do to relieve my pain so I ended up trying a chiropractor and after I went that first time I never had that horrible sciatica pain again. And when I did get a flare up they were much much less painful and eventually went away all together as I continued to get treated with Chiropractic care. The original sciatica pain is completely gone went away after just a few visit.I latee found a Gonstead chiropractor for a different issue and they took the time to take an x-ray and then measure me precisely and make sure they were adjusting what needed to be adjusted and nothing else. My original Johnston chiropractor helped me after a car accident and with other injuries I did to myself over time and each time when I went with consistent care I was able to heal and find relief.About 5 years ago I moved from Minnesota to California and I had to make sure when I moved here that I found a gunstead chiropractor which is Dr Grenda. Dr. Grenda I saw Dr Grenda initially only two times and then I didn't have to see him again because my issue was resolved. unfortunately over the past couple of years I've had a couple of injuries just from carelessness on my part and I've gone back to the doctor Grenda. Because I hadn't been in in so long he took an x-ray to get an updated picture of where my back was at and every time I come in he's very precise to measure to find where I'm having a problem
Erica Hui
Thanks Dr Grenda and Mirna for helping me to maintain my quality of life. I am a very active person. The back pain started in 2017 has prevented me from doing a lot of activities/ exercises I like. Through periodic adjustment, rehab and massage therapy, my pain is totally under control. I regained my physical ability and active lifestyle.
Erica H.
I started to have lower back pain since 2017 and started to see Dr. Grenda in 2018. Through regular adjustment, rehab and massage therapy, my back pain has improved tremendously. I was very desperate when the back pain started since I am a very active person and love exercising. The back pain basically stopped me from doing most of my activities. With Dr. Grenda's help, I was able to regain my ability to do everything I love again. Thanks Doc for helping me to get my quality of life back! Also big thanks to Mirna, the best massage therapist. Her magical hands just untie every knot on my body and help my sore muscles and joints to recover faster after my strenuous activities.