Meet The Doctors

  • Dr.
    Thomas C. Mattheson

    Thomas C. Mattheson, D.C. joined Blackman Family Chiropractic and Nutrition Center on September 21st of 2010. He worked side by side with Dr. Michael Blackman, D.C. for over nine years and has enjoyed working in the GreaterDover Community for several years now. After 8 years working with Dr.Blackman, Dr. Mattheson purchased the practice and building on August 9th of 2018 from Dr. Blackman who continues to work in the building doing Clinical Applied Nutritional Counselling.

    For over 10 years it has been great treating so many amazing patients and we look forward too many more years to come. Dr. Mattheson has had the privilege of meeting so many patients and would not trade it for the world. He has made several friends and helped hundreds of patients to heal over time with chiropractic care and the experience in treating many different conditions over the years. Dr. Mattheson has seen so much over the years and has received a ton of satisfaction when a patient is called up to be adjusted with a huge smile. Patients lift him up and make him so happy as a doctor of Chiropractic in the community because he knows what is coming next. 'Doc, I feel great!' He loves hearing those four words and it is a personal goal to get those results for every patient.

    At Mattheson Family Chiropractic we are just aiding your body in the healing process and Dr. Mattheson is so privileged to be a part of that process with you.

    Dr. Mattheson was born and raised in Andover, MA. He went to high school at Saint John's Prep in Danvers, MA where he was accepted into the University of Syracuse in NY. He received a B.S. in Biology Health Science and an A.S. in Psychology. His choices were to go on to medical school or look for alternatives in the health profession.

    In 1984 Tom's father had an accident, falling 18 feet off a ladder while working. He fractured his spine at multiple levels with severe disc herniations. He was told by orthopedic surgeons that surgery was inevitable and that 100% recovery was very unlikely at the time. Once the fractures had healed, friends suggested he seek a second opinion and other alternatives. Though his fractures had healed, the pain was still severe. Hoping to avoid surgery, he began seeing a Chiropractor. After several months of chiropractic treatments and exercise to strengthen his spine, the pain had finally subsided. He continued to have regular treatments with maintenance once a month and had avoided surgery.

    Thomas Mattheson's goal was to become a heart specialist after completing his degrees at Syracuse University. After his dad's experience, his dad asked him, 'Tom, why haven't you thought of becoming a chiropractor?'

    The idea changed his life forever once he really considered it and studied the profession along with it's amazing history dating way back to the1800's. Dr. Mattheson graduated close to home at the University of Bridgeport, College of Chiropractic in CT.

    Dr. Mattheson, has been practicing for 10 years now and continues to follow his true passion in life by healing and making a difference in the lives of others all around the seacoast community. In 2009, he started practicing in the state of Massachusetts as a licensed chiropractor as well.

    Dr. Thomas C. Mattheson states, 'I look forward to seeing new and previous patients, continuing to play a role in everyone's health care. It truly is a pleasure and honor to continue to serve the Greater Dover Community after so many years now. We would like to welcome you all into Mattheson Family Chiropractic. Cheers to your health!'

  • Dr.
    David M. Rivera

    Dr. David Rivera attended Life University in Marietta, GA, the largest chiropractic school in the world, where he received his Doctor of Chiropractic degree, graduating summa cum laude in 2018. Prior to attending chiropractic school, he obtained a BS in Athletic Training at the University of Puerto Rico and was awarded for highest GPA in the program in 2014.

    After discovering chiropractic from sustaining injuries playing tennis, he became motivated to become a chiropractor and helping people achieve health through chiropractic care. While at Life University, Dr. Rivera was active as a supplemental instructor for courses involving the treatment and diagnosis of orthopedic and neurological conditions, along with the Activator Methods Chiropractic Technique (AMCT). In addition to being certified by the National Board of Chiropractic Examiners (NBCE) in the United States, Dr. Rivera is also certified by the Canadian Chiropractic Examining Board (CCEB).

    Furthermore, he has achieved Advanced Proficiency Certifications in Activator Methods Chiropractic Technique (AMCT) and Torque Release Technique (TRT). Dr. Rivera is also certified in RockTape and Webster technique. RockTape is used to stabilize injuries and enhance athletic performance, while Webster Technique focuses on achieving proper neuro-biomechanical function in pregnant women to achieve an optimum pregnancy.

    Dr. Rivera is fluent in Spanish and enjoys working with all types of patients by helping them realize the great benefits of chiropractic care. He looks forward to serving the greater Dover community for years to come. Outside the office, Dr. Rivera is a tennis enthusiast and also enjoys bowling, television shows, and reading.

Find Us On The Map

Office Hours


8:30 am-12:30 pm

3:00 pm-6:00 pm


2:30 pm-6:00 pm


8:30 am-12:30 pm

3:00 pm-6:00 pm


2:00 pm-6:00 pm


8:30 am-12:30 pm

3:00 pm-6:00 pm


8:30 am-11:00 am




Reviews By Our Satisfied Patients

  • "I have been a patient since 1989. Fantastic, caring, and compassionate staff."
    Valerie Hebert
  • "Great providers who focus on the care you need. Always willing to do what it takes to make you feel better! Scheduling is easy and they have a broad range of times to fit with work schedules."
    Josie Gillette
  • "Very lucky to be a patient here , Dr.Blackman and Dr.Matheson always remember everything about my care here and make me feel like family. Thank you very much to the whole staff who are always super friendly and help me make appointments with my crazy schedule !"
    Devin Karkos
  • "Friendly staff, great doctors! I have seen Dr Blackman and Dr Matheson for a few years now. I feel like I new person everytime I leave their office!"
    Diana Babel
  • "Everyone at Blackman Chiropractic is very friendly and professional. The staff walks you through step by step, and Doctor Tom is very informative and professional. I left feeling relieved from joint pain, and I am very excited about my next appointment. Thank you Blackman Chiropractic for fitting me in last minute. I would highly recommend Blackman Chiropractic!"
    Lee Clouthier
  • "It has been 22 years now. I hurt my back at work. The pain was unbearable. I had never experienced anything like it before. A friend of mine asked his Chiropractor if he knew anyone in my area that I could see. He only gave one name. Dr. Blackman. Before I knew it, Dr. Blackman called me on the phone, on a Sunday night no less! He told me to come in the next day and he would examine me. But it was the following sentence that meant the most. “If I can’t help you, I will at least point you in the right direction” What more could I ask! So started a long journey. 5 days a week, then 4, then 3, then 2, then once a week. Now, I go once every 3 weeks for general maintenance. Thanks Dr. Blackman to You and your great staff for all your great care. The one thing about back pain is that recovery is slow. You have to be patient and trusting. Remember, taking pain pills are not a long term solution! I highly recommend Dr. Blackman and his staff!!"
  • "Before a week ago, I’d never been to a chiropractor and was terrified of any sort of doctors office. A coworker recommended this place and I’m so happy he did! Everyone is super welcoming, and my back feels the best it has in years!"
    Katherine Wysocki
  • "I've had several visits, and finally I've gone days without pain. I have not had this feeling in years due to. Dr. Blackman."
    Marc P.
  • "I fully recommend Dr. Blackman and his colleagues for anyone with back pain. I have been extremely satisfied with the results."
    Terry M.
  • "Excellent and caring staff that are very attentive to your condition and address your issues and concern professionally."
    Marybeth G.
  • "Friendly caring staff. They really care about you."
    Brenda L.