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Family Medicine

Peyton Holowsko, CRNP

April 23, 2025 by

Peyton earned a Bachelor of Science in Nursing from La Salle University in 2020. She started her career as an RN in the Surgical Trauma ICU with Einstein Medical Center in Philadelphia. Her pursuit of a Master of Science in Nursing degree began with her undergraduate alma mater in August 2021. The academic program concentration was Family Nurse Practitioner, so Peyton transitioned from acute care to primary care when she came to work for PentaHealth in December 2021. She worked as a full-time RN while participating in La Salle University’s MSN program. Peyton completed the MSN program in December 2024.

Peyton is board certified through the American Academy of Nurse Practitioners. She enjoys listening to patients, teaching them about their health, and cultivating lasting patient relationships. She values the ability to care for the whole family when all are patients of the Family Practice. Peyton has a special interest in working with adolescents and young adults.

When she is not seeing patients, one of Peyton’s favorite things to do is walk the dog with her husband and have a morning coffee in hand. She also enjoys reading, cooking, and traveling, but most importantly she cherishes spending time with her family.

Hubert Wu, DO

April 16, 2025 by

Dr. Hubert Wu obtained his medical degree at the Philadelphia College of Osteopathic Medicine. He went on to complete his residency at Penn State Health – St. Joseph’s in Family and Community Medicine, where he was elected as Chief Resident during his 3rd year. Dr. Wu has worked as an Attending Hospitalist on medical/surgical/ICU floors as well as an outpatient primary care provider in a hybrid role, valuing the traditional approach to Family Medicine in both the inpatient and outpatient setting.

Dr. Wu’s interests span the entire spectrum of primary care. He strives to promote patient’s health with a collaborative and accountable approach. He prides himself on finding ways to individualize his care with each one of his patients.

He enjoys spending time with family, which includes his three children (and all the chaos that entails) and wife.

Katelyn Bradley, MD

August 9, 2024 by

Dr. Katelyn Bradley was raised in Pittsburgh, Pennsylvania and attended the University of Notre Dame (Go Irish!). After graduating, she attended the Ohio State University College of Medicine and then completed her family medicine residency in Center City Philadelphia at Thomas Jefferson University Hospital.

Dr. Bradley has always aspired to be a primary care doctor and cherishes the opportunity to take care of a family unit. She looks forward to getting to know her patients and helping them stay well by taking a “care of the whole person” approach. She also has a special interest in restorative reproductive medicine, helping women optimize their reproductive health and achieve their family planning goals through fertility awareness methods.

In her free time, Dr. Bradley enjoys spending time with her family including her husband Conor and her baby boy Brendan. Since moving to the Philadelphia area, she has loved trying out different restaurants, especially all the delicious Italian food that Philly features! She loves many sports and enjoys any opportunity to support the Notre Dame Fighting Irish. She has just moved to Delaware County and is looking forward to exploring all that the area has to offer.

Eric Yeh, MD

January 23, 2024 by

About Eric

Dr. Eric Yeh brings a wealth of knowledge and experience to our practice. He attended the University of Texas from 2004 to 2008, where he graduated with a Bachelor of Science in Cell and Molecular Biology, after which he worked as a medical researcher.

Continuing his pursuit of excellence, Dr. Yeh later attended St. George’s University School of Medicine in Grenada. He graduated in 2014.

He completed his residency at Drexel University / Hahnemann University hospital in 2017 where he served as chief resident and was chosen for an award in clinical excellence.

Before joining us at Primary Care Downingtown, Dr. Yeh served the community in both Norristown and Phoenixville.

Sissy John, MD

January 19, 2024 by

About Sissy

Dr. John completed her pre-medical studies at the University of Szeged in Hungary, followed by medical school at the Medical University of Lublin in Lublin, Poland. Dr. John further honed her skills and expertise by completing her residency at the Montgomery Family Practice in Norristown, PA.

Throughout her educational journey and residency, Dr. John has demonstrated a commitment to excellence and a passion for providing quality patient care. Her dedication to patient well-being aligns seamlessly with our commitment to delivering exceptional healthcare services to our community!

Carrie Karhnak-Glasby, CRNP

January 17, 2024 by

About Carrie

Carrie Karhnak-Glasby joined PentaHealth at Mt. Airy Family Practice in 2015 as a registered nurse and is now in a new role as a medical provider!

Carrie Karhnak-Glasby earned her Bachelor’s degree in Nursing from Thomas Jefferson University in 2014 and a Master’s degree in Nursing from Frontier Nursing University in 2023. She is seeing patients of all ages with a focus on preventative care and promoting healthy habits, especially for patients with chronic conditions.

Outside of the office, you can find Carrie Karhnak-Glasby baking, discussing Octavia Butler novels and musical theatre, and cheering on her daughter’s volleyball team!

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Recent Posts

  • Memorial Day Holiday Hours
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  • Welcome Peyton Holowsko, CRNP
  • Welcome Dr. Hubert Wu
  • Retirement of Dr. Jean Stretton

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