DR. WILLIAM C GUENTHER JR. M.D.
NPI 1386789618
Internal Medicine - Hematology & Oncology in Appleton, WI

Q: What is William Guenther's NPI number?

The NPI number for William Guenther is 1386789618. It was assigned to this individual provider in the NPPES registry on February 21, 2007.

Q: What is William Guenther's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.

Q: When was this NPI record last updated?

The NPPES record for William Guenther was last updated on January 10, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since February 21, 2007PECOS Enrolled

3925 N GATEWAY DR, APPLETON, WI 54913(920) 749-1171 Get Directions Write a Review

NPPES record last updated: January 10, 2017. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Jan 10, 2017, Oct 25, 2016, Dec 8, 2015 (3 updates tracked since 2015).

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About Dr. William C Guenther Jr. M.d. NPPES

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

DR. WILLIAM C GUENTHER JR. M.D. (NPI 1386789618) is an individual hematology & oncology provider in Appleton, Wisconsin, licensed in Wisconsin (29203) and active in the NPI registry since February 2007. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1386789618

Entity TypeIndividualMale

Primary Taxonomy207RH0003X

Provider Legal NameDR. WILLIAM C GUENTHER JR.Credential: M.D.

Location Address3925 N GATEWAY DRAppleton, WI 54913-7863

Mailing Address3232 N Ballard Rd, Suite 200Appleton, WI 54911-8804 · (920) 749-9668 · Fax (920) 734-5307

Phone(920) 749-1171

Sole ProprietorNo

Enumeration DateFebruary 21, 2007

Last NPPES UpdateJanuary 10, 20173 updates tracked since enumeration

✔ NPI 1386789618 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Hematology & OncologyAllopathic & Osteopathic Physicians

Taxonomy Code207RH0003X

License✔ Licensed in WI · 29203

Definition

An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.

3925 N GATEWAY DR, Appleton, WI 54913

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Other Identifiers 5

Medicare ID-Type Unspecified000171005WI

Medicare ID-Type Unspecified000145450WI

Medicare PINK300307094WI

Medicaid31396700WI

Medicare UPINA02287WI

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. William C Guenther Jr. M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 54913 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

$163.24 typical visit price

range $53.90 – $163.24

Typical copayment $40.81 (range $13.47 – $40.81)

Most-billed visit code 99205

Established Patient

$95.41 typical visit price

range $17.40 – $133.76

Typical copayment $23.85 (range $4.35 – $33.44)

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

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

Standard wheelchair K0001

DME-Wheelchairs · category DD000N

1 supplier12 claims12 services$26.73 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 20

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

FOX VALLEY HEMATOLOGY & ONCOLOGY S C

Pharmacy (Community/Retail Pharmacy)

3925 N GATEWAY DR, SUITE 100
APPLETON, WI 54913

Outagamie County (920) 702-4802

BRITTANY E GOODRICH-BRAUN

Family Medicine