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

Dr. James C Mason, MD

Individual provider Internal Medicine Physician · NPI 1174675524

Dr. James C Mason, MD is an Internal Medicine Physician in Walla Walla, Washington. Practices as a sole proprietor. Licensed in Colorado and Washington.

Licensed in
CO, WA
In the registry since
2007
Specialties on file
3
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

1025 S 2nd Ave
Walla Walla, WA 99362-4116
Phone: (509) 525-0480
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence MD60166611 (WA)
Hospitalist Physician Taxonomy 208M00000X · Licence MD60166611 (WA)
Hospitalist Physician Taxonomy 208M00000X · Licence 33008 (CO)

Record details

NPI number1174675524
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJanuary 17, 2007
Last updated in NPPESOctober 27, 2011
Mailing address1025 S 2nd Ave, Walla Walla, WA 99362-4116

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