Meet the Doctors & Staff

All professionals at Hyde Park Pediatrics maintain the highest levels of accreditation and pursue ongoing education to stay abreast of the latest trends in the medical field. Read on to learn more about our staff's experience and training.

2022 Staff PhotoPictured above: (Back row, Left to Right): Tammy B., Lynn H., Samantha Z., Roni R., Caitlin H., Tre'ci C., (Front row) Veronica G., Morgan M., Melissa D., Rebekah T., Caitlin P., Megan N.


Willie Ng, MD

Dr. Ng was the founding physician at Hyde Park Pediatrics over 20 years ago. He graduated from medical school at the Federal University of Pernambuco in Brasil. He is formally trained in both General Pediatrics and Pediatric Cardiology. Dr Ng has a special interest in travel medicine and cardiology. He enjoys traveling, photography, and watching movies. Dr Ng is married and has three children.

Gregg Kottyan, MD

Dr. Kottyan attended Duke University where he obtained his bachelor's degree in Biology and Chemistry. He then moved to Cincinnati for good, attending the University of Cincinnati College of Medicine for his medical degree before completing a Pediatric residency and Sports Medicine fellowship at Cincinnati Children's Hospital. He has a special interest in sports injuries, obesity management, and adolescent health. In addition to routine pediatric primary care, Dr. Kottyan can manage most non-surgical orthopedic problems including sprains, strains, fractures, concussions, and chronic injuries or pain. In his spare time, Dr. Kottyan enjoys woodworking, playing the piano, ice hockey, weightlifting, and spending time with his wife and four children.

Kathy Sorger, MD

Kathy SorgerDr. Sorger returned to Hyde Park Pediatrics in 2016. She has an interest in well child care, ADD/ADHD, and newborn care. In her free time she enjoys traveling and spending time with family.

Ashley O'Bryan, MD

Ashley O'BryanDr. O'Bryan was born and raised on the west side of Cincinnati. She attended Saint Ursula Academy for high school and received a bachelor's degree in Chemistry from University of Cincinnati. She attended Wright State University Boonshoft School of Medicine for medical school before moving to Grand Rapids, Michigan. There, she completed a Pediatric residency at Helen DeVos Children's Hospital with Michigan State University. She has a special interest in newborn care, adolescent medicine and  healthy lifestyle medicine. In her free time, Dr. O'Bryan enjoys spending time with her husband and two dogs. She also enjoys cheering on the Cincinnati Bengals, hiking, crocheting, and dancing.

Jenifer Jones, MD

Jenifer JonesJenifer Jones attended The University of Southern Mississippi for her Bachelor of Elementary Education degree. She worked as an elementary school teacher for a few years prior to attending the University of Cincinnati College of Medicine for her MD. She completed pediatric residency training at Dayton Children's Hospital and Wright-Patterson Air Force Base. Beyond general pediatrics, her interests include traveling, music, hiking, and spending time with her family.

Katarina Schneider, CNP

Katarina joined the practice in October 2019. She graduated first from Northern Kentucky University with a bachelor's degree in biology. She then studied nursing at the University of Cincinnati and went on to work at Cincinnati Children's Hospital while she obtained her master's degree. In 2017 she began her career as a nurse practitioner working with adults but quickly realized she missed caring for infants and children. She is very happy to return to her true love of pediatrics. Katarina was born and raised on the west side of Cincinnati. She enjoys being outdoors and spending time with her friends and family.

Jennifer Ashton, CNP

Jennifer AshtonJennifer returned to Hyde Park Pediatrics in June of 2022 after spending 3 years in Texas. Jennifer graduated from the University of Utah in 2004 with a bachelor's degree in nursing. She worked in nursery and maternal units for 10 years before attending The Ohio State University where she completed her training as a Family Nurse Practitioner in 2014. Her clinical interests include health and wellness education, newborn care, and lactation management. She also has been an IBCLC certified lactation consultant since 2017 and often integrates lactation visits into routine checkups. Jennifer enjoys reading, exercise, and travel, and is married with three children.

Lactation Consultant

Bethany Hanser, IBCLC, ICCE

International Board Certified Lactation Consultant

Child Therapist

Henry Ludwig, I.P.C.C., B.C.P.C.

APA Board Certified
Clinical Diplomat International Academy of Behavioral Medicine

Hyde Park Office

3330 Erie Ave.
Cincinnati, Ohio 45208
513-979-0569 (fax)

Kenwood Office

7720 Montgomery Rd.
Cincinnati, Ohio 45236
513-891-7696 (fax)

Please call (513) 321-0199 after hours to reach the on-call provider. If you are not automatically connected to the answering service, PerfectServe, please call them directly at 1-877-844-3492.

*Note that all calls go to the Hyde Park location for scheduling and triage 

Hyde Park Hours

Monday - Friday:

9:00 am - 5:00 pm


8:30 am - 11:00 am



Kenwood Hours

Monday - Friday:

9:00 am - 5:00 pm

Saturday, Sunday:


**Typically, 2-3 well check appointments will be scheduled for each Saturday. The remaining appointments are scheduled same-day for sick visits. Primarily Kenwood patients are certainly welcome to be seen in Hyde Park on Saturdays. Phone lines open at 8:30am.

During the week we accept same-day appointments for both sick and well visits. Please call at the beginning of the day (8:30 am) for availability.

PLEASE NOTE: The office closes daily from 12pm-1pm for lunch and the doors will be locked. Prescription pick up and form drop off will be accepted during regular hours only.