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

Dr. Gillian Alison Southwell, MD

Individual provider Internal Medicine Physician · NPI 1396899399

Dr. Gillian Alison Southwell, MD is an Internal Medicine Physician in Washington, District of Columbia. Licensed in District of Columbia and Maryland. Registered with an NPI since 2007.

Licensed in
DC, MD
In the registry since
2007
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

110 Irving St Ste 4B1
Washington, DC 20010
Phone: (202) 877-5975
Fax: (202) 877-2718
Show map & directions

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

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence MD31790 (DC)
Internal Medicine Physician Taxonomy 207R00000X · Licence D55636 (MD)

Record details

NPI number1396899399
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedJanuary 23, 2007
Last updated in NPPESJuly 8, 2007

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