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

John H Vassall II, MD

Individual provider Internal Medicine Physician · NPI 1619964103

John H Vassall II, MD is an Internal Medicine Physician in Seattle, Washington. Licensed in Washington. Registered with an NPI since 2005.

Licensed in
WA
In the registry since
2005
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

515 Minor Ave Ste 300
Seattle, WA 98104-2120
Phone: (206) 386-9500
Fax: (206) 386-9605
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 MD00019787 (WA)

Record details

NPI number1619964103
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedSeptember 30, 2005
Last updated in NPPESJuly 13, 2026

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