Trust our Experienced and Dedicated Therapists and Providers

Mitchell Ehrlich, MD

Medical Director

Dr. Ehrlich is a specialist in Physical Medicine and Rehabilitation (Physiatry). He has been Board Certified by the American Board of Physical Medicine and Rehab since 1987. He is a graduate of Lafayette College in 1978 with a Bachelor’s in Chemistry and SUNY Downstage College of Medicine in 1982.

Doreen Dimanche-Smith, FNP-C, APRN, MSN, BSN

Chief Medical Officer of Thrive Medical Clinics

Dorreen SmithDoreen has a paralegal degree and legal studies. Doreen received her BSN and MSN with honors, both from Stony Brook University. She is currently in the process of completing her Doctorate in Executive Leadership. She is a member of the American Academy of Anti-Aging Medicine and the American Association of Nurse Practitioners (AANP). Doreen has experience in pediatrics and adult ICU and emergency rooms. In 2020, Doreen opened Thrive Medical of Smithtown, NY. After successfully managing the office as the President, in 2021 Doreen became the Chief Medical Officer for all the Thrive Medical locations. Doreen is a mother to two step-children and mother of four children. She enjoys being a mom, laughing, shopping, dancing battles with her kids, singing Whitney Houston songs, and spending time with her husband and family.

Danielle DelPesce, PA-C

Danielle DelPesceDanielle is a board-certified Physician Assistant. She graduated from Touro College School of Health Science in 2012 and is a member of the New York State Society of Physician Assistants, the American Academy of Physician Assistants, and the Association of Physician Assistants in Cardiology. Danielle is committed to providing the highest level of care to her patients. She enjoys being involved in the entire patient experience by creating an individualized treatment plan to meet each patient’s unique needs and guiding their care to recovery. Danielle specializes in sports functional medicine, osteopathic manipulation, and trigger point injections.

Melanie Lentini, FNP-C

Melanie LEntiniMelanie has been in the health care field for over ten years. Her journey began as an LPN. Melanie worked in a nursing home and home health care while she obtained her RN. She attended Stony Brook University for her bachelor’s degree and then went on to study for her master’s at Long Island University for her FNP. She now joins our staff as a certified NP. When she’s not working, she enjoys spending time with her family and friends. Especially her husband, her cat, Chav, and dog Georgia.

Lorena Almanzar, DPT

Lorena AlmanzarLorena graduated from Quinnipiac University in 2017 with a bachelor’s in Health Science and continued on to pursue her Doctorate of Physical Therapy at the same institution. Lorena received her DPT in 2020 and started her career as a home care therapist in Colorado. During her time working in homecare, Lorena served both pediatric and geriatric populations with various diagnoses. This experience cultivated her passion for working with adults and optimizing their quality of life. Lorena has experience treating patients with several neurological conditions such as Stroke, Parkinson’s, Alzheimer’s Dementia, Multiple Sclerosis, as well as general orthopedic conditions. She is an innovative and passionate clinician that values patient-centered care through a strong patient-therapist relationship. Lorena is an avid runner and dog lover who enjoys going hiking with her golden doodle, Ozzy. Lorena believes in being a lifelong learner and is always seeking new strategies and treatment protocols in order to achieve the best outcome for each patient. She takes pride in her dedication to achieving a pain-free life for her clients and empowering them through impairment-specific education.

Jeremy Mierisch, MS, LAc.

Jeremy MierischJeremy was drawn into this field due to being a severe and chronically ill patient for nearly a decade. If it were not for the intervention of eastern medicine combined with the efforts of western medicine, he would not be where he is today. After he got his life back, Jeremy was determined to become a licensed acupuncturist and help as many people as possible.

Stacy Niessing, MS, LAc.

  • Bachelors of Professional Studies, Health Science – New York College of Health Professions
  • Masters of Science in Acupuncture – New York College of Health Professions

Karen Dion, DC, CCSP

Dr. Karen Dion Dr. Karen holds a Doctorate of Chiropractic Medicine from Los Angeles College of Chiropractic and is a Certified Chiropractic Sports Physician (C.C.S.P) from the New York Chiropractic College. She has a Bachelor of Science in Biology from Providence College as well as a Certificate in Nutrition and Kinesiology from the Cooper Clinic in Texas.

To schedule an appointment with our friendly staff, call 631-591-3093 today.