DR. WILLIAM B GUNDERSON IV MD
NPI 1205151990
Internal Medicine in Friday Harbor, WA

Active since April 06, 2010PECOS EnrolledAccepts Medicare Assignment
1117 SPRING ST, FRIDAY HARBOR, WA 98250(360) 378-2141(360) 378-1785 Get Directions Write a Review

NPPES record last updated: July 30, 2024. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: Jul 30, 2024, Sep 29, 2021 (2 updates tracked since 2021).

About Dr. William B Gunderson Iv Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. WILLIAM B GUNDERSON IV MD (NPI 1205151990) is an individual internal medicine provider in Friday Harbor, Washington, licensed in Washington (MD60476325) and active in the NPI registry since April 2010. He is enrolled in Medicare PECOS, is affiliated with Island Hospital, and maintains a secondary practice location in Portland.

NPPES Registry Identity

NPI1205151990
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. WILLIAM B GUNDERSON IVCredential: MD
Location Address1117 SPRING STFriday Harbor, WA 98250-9782
Mailing Address220 Nw 49th StSeattle, WA 98107-3417 · (503) 791-2709
Fax(360) 378-1785
Sole ProprietorNo
Medical School CMSTulane University School Of MedicineGraduated 2010
Enumeration DateApril 6, 2010
Last NPPES UpdateJuly 30, 20242 updates tracked since enumeration
NPPES CertifiedJuly 30, 2024
NPI 1205151990 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License Licensed in WA · MD60476325
Definition

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

1117 SPRING ST, Friday Harbor, WA 98250

Secondary Practice Location 1

Location 13181 SW Sam Jackson Park RdPortland, OR 97239-3011 · Phone (503) 494-8211

Accepted Insurance

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

Enrolled in Medicare and accepts Medicare assignment

Dr. William B Gunderson Iv Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID3678719937
PECOS Enrollment IDI20140910002173
Eligible to Order & Refer Part B Labs & Imaging Durable Medical Equipment Home Health Agency Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Hospital Affiliations CMS Care Compare 4

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Island Hospital

Acute Care Hospitals · Anacortes, WA
5/5 CMS rating
OwnershipGovernment - Hospital District or Authority
CMS Certification Number500007
Location1211 24th StreetAnacortes, WA 98221 · Skagit County
Emergency services Birthing friendly

St Joseph Hospital

Acute Care Hospitals · Bellingham, WA
4/5 CMS rating
OwnershipVoluntary non-profit - Other
CMS Certification Number500030
Location2901 Squalicum ParkwayBellingham, WA 98225 · Whatcom County
Emergency services Birthing friendly

Peacehealth United General Medical Center

Critical Access Hospitals · Sedro Woolley, WA
3/5 CMS rating
OwnershipGovernment - Hospital District or Authority
CMS Certification Number501329
Location2000 Hospital DriveSedro Woolley, WA 98284 · Skagit County
Emergency services

Peacehealth Peace Island Medical Center

Critical Access Hospitals · Friday Harbor, WA
OwnershipVoluntary non-profit - Private
CMS Certification Number501340
Location1117 Spring StreetFriday Harbor, WA 98250 · San Juan County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 98250 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$130.99 typical visit price
range $57.27 – $172.80
Typical copayment $32.74 (range $14.31 – $43.20)
Most-billed visit code 99204
Established Patient
$100.78 typical visit price
range $18.56 – $141.11
Typical copayment $25.19 (range $4.64 – $35.27)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Referred Medical Equipment & Supplies CMS DME claims 8

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253
DME-Other DME · category DE017N
3 suppliers20 claims65 services$5.87 avg. paid by Medicare
Portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing E0431
DME-Oxygen and Supplies · category DC000N
1 supplier51 claims51 services$19.39 avg. paid by Medicare
Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate E1390
DME-Oxygen and Supplies · category DC002N
3 suppliers93 claims93 services$110.63 avg. paid by Medicare
Portable oxygen concentrator, rental E1392
DME-Oxygen and Supplies · category DC002N
2 suppliers22 claims24 services$36.61 avg. paid by Medicare
Albuterol, up to 2.5 mg and ipratropium bromide, up to 0.5 mg, fda-approved final product, non-compounded, administered through dme J7620
DME-Drugs Administered Through DME · category DG006N
3 suppliers18 claims1,680 services$0.07 avg. paid by Medicare
Budesonide, inhalation solution, fda-approved final product, non-compounded, administered through dme, unit dose form, up to 0.5 mg J7626
DME-Drugs Administered Through DME · category DG000N
1 supplier13 claims780 services$0.75 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 18

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Family Medicine
1117 SPRING ST
FRIDAY HARBOR, WA 98250
Family Medicine
1117 SPRING ST
FRIDAY HARBOR, WA 98250
Family Medicine
1117 SPRING ST
FRIDAY HARBOR, WA 98250
Family Medicine
1117 SPRING ST
FRIDAY HARBOR, WA 98250
Family Medicine
1117 SPRING ST
FRIDAY HARBOR, WA 98250
Family Medicine
1117 SPRING ST
FRIDAY HARBOR, WA 98250
Family Medicine
1117 SPRING ST
FRIDAY HARBOR, WA 98250
Nurse Practitioner
1117 SPRING ST
FRIDAY HARBOR, WA 98250

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is William Gunderson's NPI number?

The NPI number for William Gunderson is 1205151990. It was assigned to this individual provider in the NPPES registry on April 6, 2010.

Where is William Gunderson located?

William Gunderson practices at 1117 Spring St, Friday Harbor, WA 98250. The listed phone number is (360) 378-2141.

What is William Gunderson's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is William Gunderson enrolled in Medicare?

Yes. William Gunderson is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does William Gunderson accept?

Health plans from PacificSource Health Plans, Premera Blue Cross Blue Shield of Alaska and Providence Health Plan list William Gunderson as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is William Gunderson affiliated with any hospitals?

According to CMS data, William Gunderson is affiliated with Island Hospital, St Joseph Hospital, Peacehealth United General Medical Center and Peacehealth Peace Island Medical Center.

When was this NPI record last updated?

The NPPES record for William Gunderson was last updated on July 30, 2024. NPI Profile syncs with the weekly NPPES data releases published by CMS.