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

Jillian Marianos, FNP

Individual provider Family Nurse Practitioner · NPI 1275266876

Jillian Marianos, FNP is a Nurse Practitioner in Arlington, Virginia. Graduated from George Washington University School of Medicine in 2022, 4 years ago. Practices with Medstar Heart Institute LLC, a 311-clinician group and accepts Medicare assignment. Licensed in Virginia.

Years since qualifying
4
Trained at
George Washington University School of Medicine
Licensed in
VA
In the registry since
2022
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

1625 N George Mason Dr Ste 354
Arlington, VA 22205-3687
Phone: (703) 717-7780
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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 0024184708 (VA)

Record details

NPI number1275266876
Entity typeIndividual (Type 1)
GenderFemale
Credentials FNP
Sole proprietorYes
NPI enumeratedJuly 1, 2022
Last updated in NPPESAugust 11, 2022
Certification dateAugust 11, 2022

Medicare enrollment

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

Medicare specialtyNURSE PRACTITIONER
Medical schoolGEORGE WASHINGTON UNIVERSITY SCHOOL OF MEDICINE
Graduated 2022 (4 years in practice)
Group practice Medstar Heart Institute Llc — 311 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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