Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Mary Onderdonk, DNP, CRNP

Individual provider Gerontology Nurse Practitioner · NPI 1245802156

Dr. Mary Onderdonk, DNP, CRNP is a Gerontology Nurse Practitioner in Towson, Maryland. Licensed in Maryland. Registered with an NPI since 2021.

Licensed in
MD
In the registry since
2021
What do these letters mean?
DNP — Doctor of Nursing Practice
The highest clinical degree in nursing.
CRNP — Certified Registered Nurse Practitioner
The title Pennsylvania and some other states use for a nurse practitioner.

See every abbreviation used in this directory →

Practice location Address checks out

6701 N Charles St Ste 4105
Towson, MD 21204-6808
Phone: (443) 849-6255
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Gerontology Nurse Practitioner (primary) Taxonomy 363LG0600X · Licence R234428 (MD)

Record details

NPI number1245802156
Entity typeIndividual (Type 1)
GenderFemale
Credentials DNP , CRNP
Sole proprietorNo
NPI enumeratedJuly 12, 2021
Last updated in NPPESAugust 30, 2021
Certification dateAugust 30, 2021

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