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

Marie Bernadette Gaston Diez, FNP

Individual provider Family Nurse Practitioner · NPI 1568488138

Marie Bernadette Gaston Diez, FNP is a Nurse Practitioner in Fairfax, Virginia. Graduated from Marymount University in 1995, 31 years ago. Practices with Inova Health Care Services, a 1,827-clinician group and accepts Medicare assignment. Licensed in Virginia.

Years since qualifying
31
Trained at
Marymount University
Licensed in
VA
In the registry since
2006
What do these letters mean?
FNP — Family Nurse Practitioner
A nurse practitioner who treats patients of all ages, much like a family doctor.

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Practice location Address checks out

8505 Arlington Blvd Ste 400
Fairfax, VA 22031
Phone: (571) 226-5600
Fax: (571) 423-5067
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Nurse Practitioner (primary) Taxonomy 363LF0000X · Licence 0001135171 (VA)

Record details

NPI number1568488138
Entity typeIndividual (Type 1)
GenderFemale
Credentials FNP
Sole proprietorNo
NPI enumeratedJuly 15, 2006
Last updated in NPPESDecember 19, 2012

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyNURSE PRACTITIONER
Medical schoolMARYMOUNT UNIVERSITY
Graduated 1995 (31 years in practice)
Group practice Inova Health Care Services — 1827 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

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