About
Thomas S. Ziering, MD, FAAFP, earned his medical degree from Rutgers University Medical School in Newark. He completed his residency at RWJ University Somerset Medical Center in 1990, earning recognition as Top Resident Educator. He holds board certification as a Fellow of the American Academy of Family Physicians.
Dr. Ziering has practiced family medicine for more than 30 years. During his training, he completed electives in oncology in England, dermatology in Miami, and cardiology in Dallas. In 1992, he joined initial clinical trials as a clinical researcher for HIV illness. He was among the first physicians to care for gay men during the HIV crisis of the 1980s and early 1990s. He describes himself as one of the only out gay family physicians in New Jersey. In 1994, he developed and chaired an Independent Family Practice Department at Morristown Medical Center for six years. He later served as Medical Director of LGBTQI Services for a private medical corporation from 2015 to 2017. He speaks nationally and lectures at numerous New Jersey programs, teaching medical students, residents, nurse practitioners, physician assistants, and faculty. He delivered the first lecture on LGBTQI Medicine for Physicians in Practice at the New Jersey Academy of Family Medicine. Castle Connolly has named him a Top Doctor for 25 consecutive years. He has earned over 40 Top Physician Awards across publications including New Jersey Monthly Magazine, New York Magazine, Ladies Home Journal, and US News and World Report. Patients have trusted him across generations. He has delivered more than 150 newborns, and many of the children he cared for now bring their own families to him. His patients know him simply as Tom.
Education & Training
Medical School
Rutgers University Medical School, Newark
Residency
RWJ University Somerset Medical Center, completed 1990
Certifications
Conditions Treated
Who is Dr. Ziering right for?
Dr. Ziering is a strong fit for patients who want a physician experienced across a wide range of life circumstances. Adults seeking LGBTQI-affirming care, HIV treatment, PrEP, or gender transition support will find deep expertise here. Patients navigating end-of-life planning, including Medical Aid in Dying, can rely on his experience in that area. Families across generations are welcome, from newborns to older adults managing chronic conditions. Anyone who values a warm, relationship-driven practice where they are seen as a whole person will feel at home with Dr. Ziering.
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Frequently Asked Questions
Dr. Ziering treats a broad range of conditions across family and preventive medicine. His specialties include HIV care, STD treatment, hormone therapy, and gender transition care. He also provides end-of-life support, including Medical Aid in Dying. Patients bring him concerns ranging from routine preventive screenings to complex chronic conditions.
Yes. Dr. Ziering holds board certification as a Fellow of the American Academy of Family Physicians, the FAAFP designation. He earned his degree from Rutgers University Medical School and completed his residency at RWJ University Somerset Medical Center in 1990.
Dr. Ziering has practiced family medicine for more than 30 years. He began his career in the late 1980s and was among the first physicians in New Jersey to care for gay men during the HIV crisis.
Yes. Dr. Ziering has focused on LGBTQI health throughout his career. He served as Medical Director of LGBTQI Services for a private medical corporation from 2015 to 2017. He also delivered the first lecture on LGBTQI Medicine for Physicians in Practice at the New Jersey Academy of Family Medicine. He describes himself as one of the only out gay family physicians in New Jersey.
Yes. Dr. Ziering has provided HIV care since 1992, when he joined initial clinical trials as a clinical researcher. He offers HIV treatment, PrEP, and PEP for patients who need them.
Castle Connolly has named Dr. Ziering a Top Doctor for 25 consecutive years. He has earned more than 40 Top Physician Awards across publications including New Jersey Monthly Magazine, New York Magazine, Ladies Home Journal, and US News and World Report.
Yes. Dr. Ziering practices full-spectrum family medicine and welcomes patients across all life stages. He has delivered more than 150 newborns, and many patients he cared for as children now bring their own families to him.
Yes. Dr. Ziering provides hormone therapy and gender transition care as part of his clinical services. He has extensive experience supporting patients through all stages of gender transition.
Yes. Dr. Ziering offers end-of-life transition support, including Medical Aid in Dying (MAID) for eligible patients in New Jersey. He approaches this area of care with the same thoroughness and compassion he brings to all clinical work.
Yes. Dr. Ziering speaks nationally and lectures at numerous New Jersey programs. He teaches medical students, residents, nurse practitioners, physician assistants, and faculty.
Doctor profile last updated March 21, 2026