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

Dr. Dan S Grinstead, MD

Individual provider Internal Medicine Physician · NPI 1881668010

Dr. Dan S Grinstead, MD is an Internal Medicine Physician in Walla Walla, Washington. Licensed in Washington. Registered with an NPI since 2006.

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 →

Practice location Address checks out

55 W Tietan St
Walla Walla, WA 99362-4445
Phone: (509) 525-3720
Fax: (509) 522-1588
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 MD00044572 (WA)

Record details

NPI number1881668010
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedFebruary 14, 2006
Last updated in NPPESNovember 27, 2007
Mailing address55 W Tietan St, Walla Walla, WA 99362-4445

Other providers in Walla Walla