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COVID-19 Update

We are experiencing extremely high call volume related to COVID-19 vaccine interest. Please understand that our phone lines must be clear for urgent medical care needs. We are unable to accept phone calls to schedule COVID-19 vaccinations at this time. When this changes, we will update this web site. Please know that our vaccine supply is extremely small. Read all COVID-19 Vaccine Information.

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Johns Hopkins Children’s Center

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Our Team




Division director Maria Oliva-Hemker, M.D., appeared on the cover of Baltimore magazine as a Top Doctor in 2013, and the division's faculty regularly appear in the magazine's annual Top Doctors Guide.

Advanced Practice Nurses

Mary Kay Alford, M.S.N., R.N., C.P.N.P.
Pediatric Nurse Practitioner
Medical Coordinator, Pediatric Liver Center

Lynn Mattis, M.S.N., R.N.
Clinical Nurse Specialist 

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