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

William Frederick Johnston, MD

Individual provider Emergency Medicine Physician · NPI 1245398551

William Frederick Johnston, MD is an Emergency Medicine Physician in Seattle, Washington. Practices as a sole proprietor. Licensed in Washington.

Licensed in
WA
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

1550 N 115th St
Seattle, WA 98133-8401
Phone: (206) 368-1765
Fax: (206) 368-1197
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

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence MD00015606 (WA)

Record details

NPI number1245398551
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedDecember 5, 2006
Last updated in NPPESJuly 8, 2007

Other providers in Seattle