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

Dr. Ben Williams Sonnichsen, MD

Individual provider Family Medicine Physician · NPI 1295841914

Dr. Ben Williams Sonnichsen, MD is a Family Medicine Physician in Prosser, Washington. Licensed in Washington. Registered with an NPI since 2006.

Licensed in
WA
In the registry since
2006
Specialties on file
2
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

820 Memorial St Ste 1
Prosser, WA 99350-2504
Phone: (509) 786-2010
Fax: (509) 788-1794
Show map & directions

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

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence MD00029197 (WA)
Family Medicine Physician Taxonomy 207Q00000X · Licence MD00017164 (WA)

Record details

NPI number1295841914
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 23, 2006
Last updated in NPPESDecember 5, 2011

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