We have been serving northwest New Jersey families in Hackettstown since 2009. Our patients' experience is one of our highest priorities, second only to their health - we take tremendous pride in providing a warm and caring environment for each person who comes through our doors. We proudly accept many insurance plans - call to see if yours is included.>

We are always striving to offer the highest level of care to our patients, and part of that is offering them convenience. We provide many services in-house that are typically performed by outside specialists. Lab draws are conducted on premises, and we also have resident allergists, lactation consultants, Diabetes Educators and registered dietitian's. In addition to these one on one services, we host monthly support groups, workshops, and classes.

Jeffery Merkle, MD Jeffery Merkle, MD

Trained and educated in both internal medicine and pediatrics, Dr. Merkle received his degree form Robert Wood Johnson Medical School and completed his residency at Brown University, where he co-shared duties as chief resident.

He provides specialized care that combines extensive training in modern medicine with a personalized, hands-on approach. He is dedicated to the community and excels at taking care of patients of all ages. He lives in Warren county with his wife and two children.

Donna Ryan, MHS, PA-C Donna Ryan, MHS, PA-C

Donna completed her undergrad studies at Penn State University and received her master’s degree in Physician Assistant Studies from Drexel University. She has spent the past decade working in infectious disease and internal medicine. She has experience in both inpatient and outpatient settings, treating acute and chronic conditions.

Donna lives in Morris county with her husband and two children. She enjoys running.

Antonios Leontaris, PA-C

Bio coming soon

Michael Amendolara Michael J. Amendolara, MD

Dr. Mike has lived in Whitehouse Station, NJ with his spouse Rev. Arthur C. Runyan II and their cats since 1996.

He is went to undergraduate college at the University of Pennsylvania where he graduated Summa Cum Laude with a major in Bio-Mechanical Engineering and was a member of the Phi Beta Kappa Honor Society.

After undergraduate college he went to Robert Wood Johnson Medical School on a full 4 year scholarship.
He graduated from medical school and did his family medicine residency at Somerset Medical Center in Somerville, NJ.

He has been a medical doctor since 1990 and board certified in Family Medicine since 1992.

He sees patients at Dr. Merkle’s offices in Hackettstown and Hamburg, New Jersey. He sees patients of all ages, especially 2 years old and up.

Dr. A enjoys hanging with his husband and his cats, traveling as much as possible (his favorite place to go is Costa Rica), learning to speak Spanish, playing the drums (for over 50 years), juggling and reading.

Sydnee Torrence

Sydnee Torrence, PA-C

Bio coming soon

Amanda Gaspar Amanda Gaspar, PA-C

Amanda completed her undergraduate degree from Syracuse University and received her Master’s in Physician Assistant Studies from Rutgers University PA program. 

She has experience working in both urgent and primary care. She follows a patient-centered care approach to medicine, which includes taking the time to educate patients and focusing on preventative medicine strategies to help her patients get healthy and stay well.

Amanda lives in Somerset County with her husband. Her hobbies include DIY projects, real estate, and travel.

Mary Kobran Mary Kobran

Mary is a registered dietitian who has been in the field for over 10 years. She has experience in a variety of areas including of hospitals, long-term care facilities, dialysis clinics, and outpatient care. 

She enjoys working with individuals of all ages and focuses on realistic goal setting while helping others form healthy relationships with food. 

Mary believes that all foods truly can fit into your diet. She follows a patient centered approach to care and enjoys getting to know her patients and help them come up with individualized plans for their success. 

She is passionate about combining her love for nutrition with her background in fitness to help clients meet their goals. As a mom of three young children, she understands the demands of a busy schedule and loves helping her patients find a way to be the healthiest version of themselves-- even with the challenges of work and home life.

Katelyn Timony Katelyn Timony

A 2020 graduate of Arcadia University’s Physician Assistant and Masters of Public Health programs, Kate is passionate about fostering and growing positive and communicative relationships with her patients so they are better equipped to take control of their respective healthcare journeys. 

Taking into account patients’ mental, physical and social wellbeing, her experience lies primarily in the field of internal and family medicine. 

As part of the services that she offers at her primary Hamburg location, she is also equipped to perform routine women’s health screenings and examinations, as well as offering home visits on select days for those who qualify. 

She looks forward to meeting you and working with you as your new healthcare copilot!

Tammy Castles, APN

Bio coming soon

Our Location

Find us on the map

Hours of Operation

Our Regular Schedule


9:00 am-7:00 pm


8:30 am-7:00 pm


9:00 am-7:00 pm


8:00 am-7:00 pm


8:00 am-4:00 pm


8:00 am-2:30 pm