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

William B Long, MD

Individual provider Internal Medicine Physician · NPI 1639183304

William B Long, MD is an Internal Medicine Physician in Philadelphia, Pennsylvania. Licensed in Pennsylvania. Registered with an NPI since 2006.

Licensed in
PA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

3400 Spruce St 3 Dulles Bldg
Philadelphia, PA 19104-4206
Phone: (215) 349-8222
Fax: (215) 662-6530
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

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

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence MD009893E (PA)

Record details

NPI number1639183304
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 28, 2006
Last updated in NPPESFebruary 28, 2011

Other providers in Philadelphia