Our Practice

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.

Our Staff

Dr Merkle
Dr Merkle

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.

Beth Myler, FNP-C, IBCLC
Beth Myler, FNP-C, IBCLC

Beth is a family nurse practitioner and International Board Certified Lactation Consultant. She earned her bachelor's degree in nursing from Johns Hopkins University and her master's degree in nursing from Georgetown University. She is the clinical director of lactation services for our practice and has owned and operated Mahala Lactation since 2010. Beth's strengths lie in addressing her patients' acute and health maintenance needs with warmth and compassion as a truly accessible HCP.

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.

Tara Olivo-Moore, MSN, FNP-C
Tara Olivo-Moore, MSN, FNP-C

Tara is a family nurse practitioner with several years of experience as an emergency nurse. She earned her bachelor's degree in nursing from UMDNJ (now Rutgers), and her master's degree in nursing from William Paterson University. Before becoming a nurse, Tara studied history and worked in fundraising. Originally from Toronto, Tara lives with her husband and two children in Morris Township, New Jersey.

Kate Fresso, BA, IBCLC
Kate Fresso, BA, IBCLC

Kate is an International Board Certified Lactation Consultant (IBCLC) with a bachelor's degree in communications from Rutgers University and certification from University of San Diego. Her passion for breastfeeding was born with her first child, and continues to grow with each mom and baby pair that cross her path. Kate has special areas of interest in milk sharing, babywearing, breastfeeding and working, and how to make breastfeeding work for each individual family as practically as possible.

Faith Pedersen, RN, IBCLC
Faith Pedersen, RN, IBCLC

Faith is an IBCLC and a NJ licensed registered nurse with a Bachelor of Science degree in nursing from William Paterson University of NJ. She has worked with pregnant women for nearly 20 years, with the last ten years as a labor and delivery staff nurse at Hackensack University Medical Center. Her additional accomplishments include prenatal and adult hatha yoga instructor certification, reiki, herbal and aromatherapy studies, and CPR instructor.


Kathy is a Registered Dietician with over 25 years of experience caring for patients of all ages, helping them lose weight and improve or maintain their health. She is passionate about providing results-driven, solutions with attainable goals, through both individual sessions and nutritional education classes for various community groups.

Insurance Plans Accepted*:



United Healthcare

Coventry/First Health
Medicare-Part B
Beech Street

Consumer Health Network
Qualcare/AHS PPO

Great West
Healthcare Payers Coalition
Railroad Medicare

Horizon BCBS of NJ (fee for svc)

* Call to see if we accept your insurance plan

Please note -
This list is subject to change and may not include all insurance plans accepted at this time.  Please confirm insurance participation with your physician's office or insurance company.
It is important to be aware of your insurance plan's policies: co-payments, deductibles, co-insurances, participation status and responsibilities, and referral requirements.
Your co-payment is due at check-in. If you do not have insurance, a full payment is required at the time of your visit.

Our Policies

  • Payment: All co-pays and deductibles are required at the time of your visit. We accept cash, personal checks, and most major credit cards.

  • Cancelled or missed appointments: we know that "life happens." Sometimes things may arise that will necessitate cancelling appointments. Please give us 24 hours if possible. *Fees may apply

  • Lateness: please try to maximize your experience by being on time for your appointment. Dr. Merkle strives to give each of his patients the care they deserve, and that includes seeing them promptly at their scheduled times. Lateness may result in rescheduling of your appointment.