About
William P. A. with Honors in Biopsychology from Lafayette College in 1993. He completed his MD at Upstate Medical Center in Syracuse, NY in 1997 and his internship and residency in Internal Medicine at Boston University Medical Center. The American College of Physicians elected him as a Fellow in 2010.
After residency, Dr. Boxer joined the Upper East Side NYC practice of Dr. Jay Adlersberg, then became Director of Internal Medicine, Osteoporosis, and Infusion Management for the Joint Pain Center of New York. Over 15 years, he actively managed on-site IV infusions of biological medications including Remicade, Reclast, and Orencia for thousands of patients. He built a strong reputation as an osteoporosis specialist and a primary care physician for medically complex patients. Castle Connolly named him a Top Doctor in Internal Medicine for five consecutive years. New York Magazine listed him among its Best Internal Medicine Doctors in 2014. During the Covid-19 pandemic, he volunteered for urgent deployment at King's County Hospital in Brooklyn, caring for patients on the frontlines. He is passionate about osteoarthritis of the knee, including Zilretta injections, and takes a proprietary counseling-plus-medication approach to smoking cessation. Outside medicine, he enjoys tennis, the New York Yankees, country music, and working his farm in Pennington where he harvests pasture-raised chicken eggs and crafts maple syrup.
Education & Training
Undergraduate
Lafayette College, Easton, PA — B.A. with Honors in Biopsychology, 1993
Medical School
Upstate Medical Center, Syracuse, NY — MD, 1997
Residency
Internal Medicine, Boston University Medical Center, Boston, MA
Additional Training
Director of Internal Medicine, Osteoporosis, and Infusion Management for the Joint Pain Center of New York; practiced hospital and nursing home medicine
Certifications
Conditions Treated
Who is Dr. Boxer right for?
Dr. Boxer works well with adults managing chronic conditions, joint pain, or osteoporosis who want a hands-on, accessible physician. Patients dealing with knee osteoarthritis, fracture prevention, or complex medication regimens benefit from his 20-plus years of relevant clinical experience. He also serves patients ready to work on smoking cessation or weight loss with structured, personalized support. Anyone who values direct access to their doctor and unhurried appointments will find his model a strong fit.
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Frequently Asked Questions
Dr. Boxer focuses on internal medicine, preventive care, chronic disease management, osteoporosis, and osteoarthritis of the knee. He has administered knee and joint injections for over 20 years and has used Zilretta injections since the FDA approved them in 2017. He also treats patients for smoking cessation and weight loss.
Yes. Dr. Boxer holds board certification in Internal Medicine, which he first earned in 2000. The American College of Physicians elected him as a Fellow (FACP) in 2010. Castle Connolly named him a Top Doctor in Internal Medicine for five consecutive years.
Dr. Boxer earned his MD from Upstate Medical Center in Syracuse, NY in 1997. He completed his internship and residency in Internal Medicine at Boston University Medical Center in Boston, MA. He later served as Director of Internal Medicine, Osteoporosis, and Infusion Management for the Joint Pain Center of New York.
Dr. Boxer treats osteoporosis with a range of medications including Reclast, Forteo, Tymlos, and Prolia. He managed IV infusions of bone medications for thousands of patients over 15 years and built a recognized expertise in fracture prevention. He tailors treatment to each patient's bone density profile and fracture risk.
Dr. Boxer uses a proprietary approach that combines counseling with medication. He does not rely on a one-size-fits-all protocol. Patients working on smoking cessation receive a customized plan built around their specific history and goals.
Yes. Dr. Boxer travels to patients' homes for house calls throughout the local Pennington, NJ area. Patients choose whether to visit his private home office or have him come to them. He also offers telemedicine visits for additional flexibility.
Dr. Boxer gives patients direct access by phone, text, secure email, and telemedicine. There is no front desk, no phone menu, and no intermediary staff. Patients communicate exclusively with Dr. Boxer himself.
Yes. Dr. Boxer spent over 15 years actively managing on-site IV infusions of biological medications including Remicade, Reclast, and Orencia at the Joint Pain Center of New York. He treated thousands of patients during that period and lists IV infusion management among his specialty areas today.
Doctor profile last updated June 11, 2026