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

Dr. William B Gunderson IV, MD

Individual provider Student in an Organized Health Care Education/Training Program · NPI 1205151990

Dr. William B Gunderson IV, MD is an Internal Medicine in Friday Harbor, Washington. Graduated from Tulane University School of Medicine in 2010, 16 years ago. Practices with Peacehealth, a 6-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Washington.

Years since qualifying
16
Trained at
Tulane University School of Medicine
Licensed in
WA
In the registry since
2010
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

1117 Spring St
Friday Harbor, WA 98250-9782
Phone: (360) 378-2141
Fax: (360) 378-1785
Show map & directions

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

Additional practice locations (1)

  • 3181 Sw Sam Jackson Park Rd, Portland, OR 97239-3011 — (503) 494-8211

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence MD60476325 (WA)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X

Record details

NPI number1205151990
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 6, 2010
Last updated in NPPESJuly 30, 2024
Certification dateJuly 30, 2024

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolTULANE UNIVERSITY SCHOOL OF MEDICINE
Graduated 2010 (16 years in practice)
Group practice Peacehealth — 6 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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