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

John S Halsey, MD

Individual provider Gastroenterology Physician · NPI 1417944463

John S Halsey, MD is a Gastroenterology Physician in Mount Vernon, Washington. Practices as a sole proprietor. Licensed in Washington.

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

1400 E Kincaid St
Mount Vernon, WA 98274-4127
Phone: (360) 428-2500
Fax: (360) 428-6485
Show map & directions

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

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence MD00013414 (WA)

Record details

NPI number1417944463
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedOctober 4, 2005
Last updated in NPPESJuly 8, 2007
Mailing address1400 E Kincaid St, Mount Vernon, WA 98274-4127

Other providers in Mount Vernon