Liv by Advantia Health

Dr. Kressel is a general OBGYN who loves learning her patient’s stories, counseling them to help them understand any aspect of women’s health, and fine-tuning the patient experience to bring healthcare to the next level.

Fun facts about Dr. Kressel: She was briefly in the “two under two” club with two boys, born in 2018 and 2020. She felt so passionate about the Liv opportunity that she flew to DC for the day and interviewed for her position when she was almost 36 weeks pregnant (and went on to deliver in the 37th week)!

Katherine is a warm and compassionate, board-certified Family Nurse Practitioner with over eight years of experience supporting patients through all stages of life. She began her healthcare journey in the intensive care unit, building a strong foundation in acute critical care, before discovering her passion in women’s health.

Katherine’s time as a Labor and Delivery Nurse at Sibley Memorial Hospital shaped her deep understanding of the birthing process—not just clinically, but emotionally and physically. Katherine has supported countless women through labor and birth, and she brings that same calm, confident presence to every patient she sees. She understands that pregnancy and childbirth are deeply personal experiences, and she is committed to providing care that is both empowering and grounded in trust.

At Liv, Katherine creates a supportive, judgment-free space where you can ask questions, share concerns, and feel fully seen. Whether you're preparing for birth, managing reproductive needs, concerned about menopausal changes, or just navigating a new chapter in your health, Katherine is ready to listen and guide you in your healthcare goals.

Outside the clinic, Katherine enjoys life in Washington, DC, with her husband Tony, their two young sons, and their two little dogs. Katherine’s life is busy and full of joy and she brings that same energy into her work with patients every day.

Katherine is honored to be part of your care team and looks forward to providing you with healthcare that meets you where you are today.

Katherine joins the Liv team December 1.

Marie Peters is a board-certified Women’s Health Nurse Practitioner (WHNP) who brings over a decade of healthcare experience to her role at Liv by Advantia. Known for a compassionate, patient-centered approach developed through roles in diverse women’s health organizations, Marie is deeply committed to providing personalized care that meets each individual’s unique needs and goals.

In addition to her clinical background caring for obstetric and gynecologic patients, Marie has also served as an educator and mentor for medical students and WHNP trainees, helping to shape the next generation of women’s health providers.

Marie has specialized training and experience with family planning, including early pregnancy complications and loss, and contraception management. Passionate about supporting access to comprehensive reproductive healthcare, Marie empowers individuals to make informed, autonomous decisions about their well-being. She also provides supportive care for a range of sexual health concerns, including sexual dysfunction, and has hosted peer training sessions on the topic.

Her comprehensive services include preventive well-woman care, gender-affirming care, complex gynecological care, prenatal and postpartum support, and in-office procedures such as endometrial biopsy and IUD and Nexplanon removal and replacement. Through every interaction, Marie strives to create a welcoming, respectful space where patients feel heard, supported, and empowered in their healthcare journey.

Outside of work, Marie is an avid traveler who has visited 26 countries so far – with many more on the bucket list! She lives with her husband and rescue dog, Toby.