1101 Twin C Ln Ste 201

Newark, DE 19713 US

(302) 892-9355

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Meet the Chiropractors

  • Dr. Gregory Serge

    Dr. Gregory Serge is a graduate from National College of Chiropractic. While attending there, he also earned a Bachelor of Science in Human Biology. Prior to his chiropractic education, Dr. Greg received a Bachelor of Science in International Relations from the University of Delaware. He went to Salesianum High School.  Dr. Greg was awarded “Intern of the Trimester” for the National College of Chiropractic Aurora Clinic in Aurora, IL, and also had been selected for an additional Special Internship at the Association of Allied Health Professionals (AAHP) in Chicago, IL. After earning his Doctorate in Chiropractic, he returned to Delaware where he continued his education with advance training in acupuncture and is certified as a Fellow of the International Academy of Medical Acupuncture. Dr. Greg has been practicing for over 20 years. He was a competitive mountain bicyclist. Being a native of Delaware he is a dedicated Eagles fan.  His genuine passion for chiropractic care shines through his work. He loves to heal and repair, restore mobility and help his patients return to good health. His motto for healthcare is “Live life to the fullest!”.

  • Dr.
    Debra Kennedy

    Dr. Debra Kennedy has been a chiropractor in the state of Delaware for over 18 years.
    She is dedicated to delivering effective care that provides patients with outstanding results
    minus the complications and risks that often accompany surgical procedures.
    Dr. Kennedy studied at the University of Delaware before receiving her Doctorate of
    Chiropractic Degree in 1998 from Life University in Georgia. She also received a diploma
    in Chiropractic Physio Therapeutics from National College of Chiropractic with a focus
    on management of patients with serious injuries and the use of modalities in the
    chiropractic office.
    Dr. Kennedy specializes in Health and Wellness. She is committed to providing
    patients with considerable pain relief for many conditions, such as, but not limited to:
    neck pain, low back pain, headaches, TMJ dysfunction, work related injuries and motor
    vehicle accidents. She also gives patients the educational tools necessary for the
    prevention of relapse and to achieve optimal health.

  • Dr. Kristina Hollstein

    Dr. Kristina Hollstein (Retired) is a Summa Cum Laude graduate from Palmer College of Chiropractic. She is also a Chiropractic Orthopedist (a specialty that only 3% of chiropractors in the U.S. obtain). She also was a faculty member at Palmer while practicing in Illinois. Dr. Hollstein received her undergraduate degree in Chemistry with a minor in Biology at Ursinus College in Collegeville, PA. She is an avid sports enthusiast and has done triathlons and competitive swimming. Dr. Hollstein is also very active in politics, trying to achieve even better Chiropractic equality. Dr. Hollstein has been practicing for over 25 years. Dr. Hollstein has kept up to date on many continuing education classes, ensuring that her patients receive the most comprehensive and advanced chiropractic care.

If you have any questions about our Newark chiropractor, or would like to learn more about chiropractic care at Diamond State Chiropractic, please call us at (302) 892-9355 today!

Business Hours


9:00 am-7:00 pm


8:00 am-6:00 pm


8:00 am-6:00 pm


9:00 am-7:00 pm








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Reviews By Our Satisfied Patients

  • "Dr. Kris and all the staff are just phenomenal. I have been relieved of pain that I had suffered with for over 15 years! They are always flexible in working with my schedule. They are a warm and friendly group, and skilled and knowledgeable about every service, therapy and aids that they provide."
    Donna E.
  • "Dr Kris Hollstein is an amazing Chiropractor! My entire family sees her! She takes her time with all her patients! She’s involved in the Medical Community and helps promote the practice of Chiropratic care to make her patients live better! I would highly recommend Dr Kris!"
    Barbara Grabher
  • "I have been in chronic pain for at least 10 years. Grateful to have found Dr. Kris she is kind, compassionate and a wealth of information. I am so appreciative for the care provided at Diamond State for the first time I no longer think about my neck or shoulders. Very professional and kind office all the way from front to back!!! I am in the medical field and chiropractic care is definitely under utilized in medicine. My healthcare provider does include chiropractor care so I have won all the way around. I feel fabulous."
    Katherine Esdale
  • "I have been to many chiropractors in my life. Dr Greg is one of the best. I always feel so much better and looser after my visit. The rest of the staff is super friendly and knowledgeable. I enjoy their positive energy. I wish I'd have come here sooner."
  • "Thanks to Dr G Serge I have found significant relief in back. I did not expect such quick improvement in pain. I know it will take a while but I I am confident of improved function"
    Anna R., Newark, DE
  • "Came here as a recommendation from my specialist. Had been dealing with a mystery back pain for over a year at this point. This place has given me some much needed pain relief. I am so grateful for what they've done!!"
    Lisa L.
  • "First class practice, kind, professional and prompt service, they have the whole package! Dr. Greg Serge has been an amazing caregiver, he listens and customizes each treatment based on my feedback. The professional staff at this center is
    unmatched in ANY office I have ever visited. The young professional staff are friendly, personable and AMAZING, they treat me like a family member and they know my name!! How fantastic. So happy my friend recommended this chiropractic group. I highly recommend Dr. Greg Serge to all of my friends and family."
    Christie B.
  • "Incredible practice, kind, professional and prompt service, they have the whole package! The young professional staff are friendly, personable and AMAZING, they treat me like a family member. My mom has been going to see Dr. Kris for as long as I can remember. I've been to both Dr. Hollstein (Dr.Kris) and Dr. Serge I highly recommend either of them!"
    Michele S.
  • "I have benefited tremendously from the chiropractic care I received from Dr. Hollstein."
    John D Newark, DE
  • "Doctors & Staff are great, very professional. I have benefited by coming here, Dr. Hollstein steered me away from surgery & that’s great! Thanks!"
    Paul P.

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