Hyatt P. DeGreen III, DO (Tracy)

Hematology/Oncology seeing adults (18-65) and geriatrics (65+)
Accepting New Patients • Call 717.291.1313
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Hyatt P. DeGreen III, DO (Tracy) is a board-certified medical oncologist. He treats all forms of cancers that affect adults and has a special interest in lung, gastrointestinal, and plasma cell disorders.

Dr. DeGreen served as Chief Intern at Mount Sinai Medical Center in Miami Beach.

He joined Lancaster Cancer Center in 2009, which was founded by his father, Hyatt P. DeGreen II, MD (Peter), over 40 years ago. Today, Tracy is proud to be the owner of the only privately held oncology practice in Lancaster County. In 2021, he relocated the practice to 703 Lampeter Road. The space solidifies his dedication and commitment in continuing to provide the highest quality cancer care to the community.

Dr. DeGreen is a member of the Lancaster Community Oncology Collaborative, which is comprised of medical oncologists, nurses, and administrative leaders from his practice as well as from the Ann B. Barshinger Cancer Institute and Penn State Lime Spring Oncology. Together, their teams meet regularly to collaborate, support, and share information on caring for cancer patients, risk of infection, and keeping their staffs safe throughout the COVID-19 pandemic. Dr. DeGreen is also an active volunteer with the Healing Journey Foundation, the nonprofit organization that offers education, support, and advocacy to Lancaster Cancer Center patients and others in the community affected by cancer.

In his free time, he enjoys lifting weights, traveling, and spending time with his family. Dr. DeGreen lives on a small farm in Millersville with his wife, daughter, and their dogs.

“I am devoted to arming every patient and their loved ones with education, support, and the best care and treatment available. It’s my life’s work and the history of our practice.”

Education and Training

• Philadelphia College of Osteopathic Medicine

• Mount Sinai Medical Center, Miami Beach

• Penn State Milton Hershey Medical Center

• Penn State Milton Hershey Medical Center – Hematology and Oncology

Board Certification
• Medical Oncology

Hospital Privileges
• Penn Medicine Lancaster General Hospital
• UPMC Lititz Hospital

Hospital Affiliations
• Hospital of the University of Pennsylvania
• Memorial Sloan Kettering
• Fox Chase Cancer Center
• Penn State Health
• The Johns Hopkins Hospital

Know the Risks of Lung Cancer and Importance of Screening.

Click here to read the LNP article featuring Dr. Tracy DeGreen.

“I was referred to Dr. DeGreen by a close friend of mine who was being treated by him. I recommend him to anyone I come across who would be in need of his care.”
– A grateful patient

“The best most caring and compassionate doctor I’ve ever had. Dr. DeGreen is truly a blessing.”
– A grateful patient

“Dr. DeGreen really cares about his patients. Listens intently when talking with him. Wants what is comfortable and best for his patients.”
– A grateful patient

“Dr. DeGreen is a devoted caring and compassionate doctor that truly involves himself with the care of his patients.”
– A grateful patient

“Dr. DeGreen is an excellent doctor. I wouldn’t go to anybody else.”
– A grateful patient

“We have always received top-notch care from Dr. DeGreen over the years. He is an exceptional physician and a perfect blend of compassion, skill, and wisdom … an empathetic listener and always happy to give thorough explanations.

“He’s simply the best!”
– Janet, a grateful patient

“There is no other oncology group I would trust. I know they have to say they are a practice, but for us, they are like family. I wouldn’t go anywhere else.
They saved my life.”

– Rose, a grateful patient

“Dr. DeGreen is the most caring and patient doctor I’ve ever met. He was always available for questions and made sure I understood everything for my dad. He and his team definitely made this journey a bit easier.”
– Daughter of a patient

“Dr. DeGreen and his staff are like no others I’ve ever met. They truly care about you
and how you are doing. Sad to have this disease, but so thankful to have all of them in my corner.”

– A grateful patient

“If I could give Dr. DeGreen more than 5 Stars, I would. He’s the best and everyone at Lancaster Cancer Center is excellent and do a great job. When you feel terrible, they give 110% to help you feel better. I trusted them with my life, and I am very thankful for their hard work and care, and for the second chance at life they have given me.”
– A grateful patient

“Dr. DeGreen is a wonderful doctor. I have been seeing him for over seven years. He has always been extremely supportive.”
– A grateful patient

“Dr. DeGreen is one of the few genuinely caring, concerned, patient-oriented physicians I have been treated by in several years. He researches records and options during appointments, suggests solutions/tests for issues even when they are not related to the oncology field. I consider him not only a top-notch physician, but a friend. I might also add that the staff at Lancaster Cancer Center seems to reflect Dr. DeGreen’s caring and warmth toward the patients. Thank you all so very much for being a part of my life!”
– A grateful patient

“I rate him a 20! One of the most awesome doctors that are few and far between anymore! Dr. DeGreen is absolutely amazing! One of the only doctors I know that actually listens to his patients and really hears them.”
– A Grateful Patient

“I would recommend Dr. DeGreen to anyone and everyone.”
– A Grateful Patient

“Dr. DeGreen is compassionate and knowledgable like his father before him. I have gotten great care during the 14 years I’ve been going to Lancaster Cancer Center.”
– A Grateful Patient

“Dr. DeGreen is easy, accessible, and responds in a timely manner.”
– A Grateful Patient

“Dr. DeGreen is very knowledgeable, caring, and focused on the needs of his patients.”
– A Grateful Patient

“There isn’t a more professional, compassionate doctor in Lancaster County! We are blessed!.”
– A Grateful Patient

“Dr. DeGreen makes his patients feel comfortable and valued. He displays excellence in his field.”
– A Grateful Patient

“I have been a patient at LCC since 2004. Although I survived a cancer 24 years ago and had no recurrence, I have consulted the Dr. DeGreen’s annually for preventive purposes. The care offered has always been excellent, courteous, helpful, and friendly. My thanks to the LCC team .”
– A Grateful Patient

“I can’t begin to tell you how much Dr. DeGreen has impacted my life. He is the only physician that I can truly trust with my care. He listens, he makes sure the proper referrals are made if needed, he treats me and my sons (they accompany me at my appointments) as if we were his family. He is very sincere, caring, empathetic and makes sure I understand everything before I leave his office. He is a phenomenal person and I’m blessed to have him as my oncologist!”
– A Grateful Patient