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

John Alexei Siegal, MSW

Individual provider Clinical Social Worker · NPI 1669148516

John Alexei Siegal, MSW is a Clinical Social Worker in Ashburn, Virginia. Registered with an NPI since 2021.

In the registry since
2021
What do these letters mean?
MSW — Master of Social Work
The graduate degree in social work.

See every abbreviation used in this directory →

Practice location Address checks out

44335 Premier Plz Ste 230
Ashburn, VA 20147-5052
Phone: (571) 498-0109
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical Social Worker (primary) Taxonomy 1041C0700X

Record details

NPI number1669148516
Entity typeIndividual (Type 1)
GenderMale
Credentials MSW
Sole proprietorNo
NPI enumeratedAugust 20, 2021
Last updated in NPPESAugust 20, 2021
Certification dateAugust 20, 2021
Mailing address44335 Premier Plz Ste 230, Ashburn, VA 20147-5052

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