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

Dr. Benjamin Hardwick Leach, MD

Individual provider Internal Medicine Physician · NPI 1508053174

Dr. Benjamin Hardwick Leach, MD is an Internal Medicine in Walla Walla, Washington. Graduated from University of Texas Southwestern Medical School at Dallas in 2005, 21 years ago. Practices with Providence Health and Services - Washington, a 264-clinician group and accepts Medicare assignment. Licensed in Oregon and Washington.

Years since qualifying
21
Trained at
University of Texas Southwestern Medical School at Dallas
Licensed in
OR, WA
In the registry since
2007
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

401 W Poplar St Hospitalists
Walla Walla, WA 99362-2846
Phone: (509) 522-5145
Fax: (509) 522-5184
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 MD60212129 (WA)
Internal Medicine Physician Taxonomy 207R00000X · Licence LL16175 (OR)

Record details

NPI number1508053174
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedSeptember 27, 2007
Last updated in NPPESMarch 22, 2012
Mailing addressPo Box 34439, Seattle, WA 98124-1439

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolUNIVERSITY OF TEXAS SOUTHWESTERN MEDICAL SCHOOL AT DALLAS
Graduated 2005 (21 years in practice)
Group practice Providence Health And Services - Washington — 264 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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