Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Marianne Elise Crowley, FNP-BC

Individual provider Nurse Practitioner · NPI 1275400210

Marianne Elise Crowley, FNP-BC is a Nurse Practitioner in Leesburg, Virginia. Graduated from George Washington University School of Medicine in 2025, 1 year ago. Practices with Loudoun Medical Group, PC, a 274-clinician group and accepts Medicare assignment. Licensed in Virginia.

Years since qualifying
1
Trained at
George Washington University School of Medicine
Licensed in
VA
In the registry since
2025
What do these letters mean?
FNP-BC — Family Nurse Practitioner, Board Certified
A family nurse practitioner certified by the ANCC.

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Practice location Address checks out

19450 Deerfield Ave Ste 325
Leesburg, VA 20176-8503
Phone: (703) 202-1111
Fax: (571) 291-2966
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Nurse Practitioner (primary) Taxonomy 363L00000X · Licence 0024194718 (VA)

Record details

NPI number1275400210
Entity typeIndividual (Type 1)
GenderFemale
Credentials FNP-BC
Sole proprietorNo
NPI enumeratedOctober 23, 2025
Last updated in NPPESJune 1, 2026
Certification dateJune 1, 2026

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 2025 (1 years in practice)
Group practice Loudoun Medical Group, Pc — 274 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Colleagues at Loudoun Medical Group, PC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 274 clinicians in the practice; 12 are shown here.

Other providers in Leesburg