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Our Team

Our team is made up of:

We all collaborate to provide state-of-the-art diagnostic and treatment services for normal and high-risk pregnancies. Our experience and expertise make us the nation's leaders in managing and treating women and babies at this very important time in their lives.

The team includes:

Obstetricians / Directors:


Maternal-Fetal Medicine Faculty:

Maternal-Fetal Medicine Fellows:

  • Meredith Birsner, M.D. - 2nd year Fellow
  • Melissa Russo, M.D. - 2nd year Fellow
  • Clark Johnson, M.D. - 1st year Fellow
  • Jason Vaught, M.D. - 1st year Fellow
  • Maureen Grundy, M.D. - 1st year Fellow



  • Christine Bird, BS, RDMS, RVT
    Chief Obstetrical Sonographer
  • Jan Laferriere. AA, RDMS
  • Maria Zaharieva, BS, RDMS, RVT
  • Cynthia Walker, BS, RT, RDMS
  • Sarah Millard, BS, RDMS
  • Jennifer Durbin, BS, RDMS
  • Shannon Trebes, RDMS, RVT, RTR
  • Hyeyoung Ju, BS, RDMS, RDCS, RVT
  • Rachel Mazza, BS, RDMS, RVT
  • Kristen Diffenderfer, BS, RDMS, RVT
  • Rebecca Ryan, BS, RDMS

Nurse Managers:

  • Joan Diamond, RN, MS
  • Linda Hicks, RN, MS

Certified Nurse Midwives:

Fetal Assessment Nurses:

  • Kathleen Costigan, RN, MPH
  • Rosemary Critzer, BSN

Genetic Counselors:

  • Virginia Corson, M.S.
  • Cathleen Lawson, M.S.
  • Erin Story Oehler, M.S.
  • Katherine Rock, M.S.

 Obstetrical Ultrasound and Fetal Assessment Patient Service Coordinators:

        Donna Dodge, Project Coordinator

  • Jo'el Franklin, Senior Patient Services Coordinator
  • Sandra Thaniel
  • Barbara Hall
  • Shannon Bellamy

Prenatal Genetic Counseling Patient Service Coordinators:

  • Betty Gilman
  • Wendy Schlining

Birthing Center videos

Tour and patient experience 

New birthing center video thumbnail imageWatch our video about the new Birthing Center.


Traveling for care?

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Whether crossing the country or the globe, we make it easy to access world-class care at Johns Hopkins.

U.S. 1-410-464-6713 (toll free)
International +1-410-614-6424



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