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

William R Henderson Jr.

Individual provider Allergy & Immunology (Internal Medicine) Physician · NPI 1639254436

William R Henderson Jr. is an Allergy & Immunology (Internal Medicine) Physician in Seattle, Washington. Licensed in Washington. Registered with an NPI since 2006.

Licensed in
WA
In the registry since
2006
Specialties on file
2

Practice location Partly verified

Some contact details are missing from the federal record.

University Of Washington Medical Ctr 1959 NE Pacific St
Seattle, WA 98195-6166
Phone: (206) 598-4615
Show map & directions

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

Specialties & licences

Allergy & Immunology (Internal Medicine) Physician (primary) Taxonomy 207RA0201X · Licence MD00017040 (WA)
Internal Medicine Physician Taxonomy 207R00000X · Licence MD00017040 (WA)

Record details

NPI number1639254436
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorNo
NPI enumeratedOctober 27, 2006
Last updated in NPPESDecember 3, 2013

Other providers in Seattle