WILLIAM J CANNON (MD) – Internal Medicine Physician, NPI 1912971243

Internal Medicine Physician

WILLIAM J CANNON (MD) is a healthcare provider. based in Fort atkinson, Wisconsin. specializing in Internal Medicine Physician. They hold the professional credentials MD. They hold a License No. 36081211 (IL). The NPI Number for WILLIAM J CANNON (MD) is 1912971243

Main info

Male

38 Years Of Experience

Accepts Medicare Assignment

Name

WILLIAM J CANNON (MD)

NPI

1912971243

Phone

Not provided

Address

PO BOX 249

Enumeration Date

14 February 2006

Last Update Date

7 October 2022

Doctor Profile

Medical School Name

LOYOLA UNIVERSITY OF CHICAGO, STRITCH SCHOOL OF MEDICINE

Secondary Phone

9205635571

Graduation Year

1988 (38 years ago)

PAC ID

0749192953

Group Practice PAC ID

0840189718

Professional Enrollment ID

I20160526000361

Data current as of

19 May 2026

Profile Insights

NPPES metrics only — not quality of care.

Methodology

Experience77

Completeness75

Years active:20State licenses:3Digital endpointsOther names

Provider Addresses for WILLIAM J CANNON (MD)

PO BOX 249
FORT ATKINSON, WI 535380249
Phone:
Type: Mailing
500 MCMILLEN ST
FORT ATKINSON, WI 535381233
Phone: (920) 563-5571
Type: Location
500, McMillen Street, Fort Atkinson, Jefferson County, Wisconsin, 53538, United States
FORT ATKINSON, WI 535381233
Phone: (920) 563-5571
Fax: (920) 563-7705
Type: Mailing

NPPES updates history

No NPPES updates recorded for this provider.

Prescription Activity

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Open Payments (CMS)

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Medicare Enrollment & Revalidation

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Educational use only—not medical, billing, or legal advice.

No Medicare enrollment or revalidation data available for this provider in our database.

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Medicare Utilization (FFS)

Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·

Educational use only—not medical, billing, or legal advice.

No Medicare fee-for-service utilization data available for this provider in our database.

Insurance plans in this area (ZIP 53538)

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Group practice members

Group practice members are other physicians who share the same Group Practice PAC ID with this doctor. When doctors form a group practice and register in PECOS as a single entity, they receive a shared identification number. This table lists all providers in the same group practice.

PAC ID: 0840189718View full group profile

Name	Specialty	State
YAW D BERKO (MD)	Hospitalist, Internal Medicine	MI
DR. JAMIE CLEMENTI (MD)	General Surgery	IL
CAROLYN A HAERR (MD)	-	WI
BILLIE G KONTNY (MD)	General Surgery	WI
MS. JAMIE L FOLTZ (CRNA)	Certified Registered Nurse Anesthetist (Crna)	WI
BRADLEY THOMAS WAGNER (CRNA)	Certified Registered Nurse Anesthetist (Crna)	WI
ABBY LYNN ZIEGLER (FNP-BC)	Nurse Practitioner	WI
MR. STEFAN J GIERYN (CRNA)	-	WI
LYNN S BRODERICK (MD)	-	WI
ELIZABETH H LYNK (MD)	-	WI

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Frequently asked questions

How do I look up WILLIAM J CANNON (MD) by NPI?

Use NPI 1912971243 when you need to reference WILLIAM J CANNON (MD) in forms, claims, or directories.

Is WILLIAM J CANNON (MD)'s NPI currently valid?

The extract we use shows WILLIAM J CANNON (MD) as active.

What does WILLIAM J CANNON (MD) treat or focus on?

Patients typically see WILLIAM J CANNON (MD) under the specialty Internal Medicine Physician. Clinical services aligned with this taxonomy classification.

Where does public data place WILLIAM J CANNON (MD)?

The snapshot lists Fort Atkinson, Wisconsin for WILLIAM J CANNON (MD); download NPPES for the complete set.

What if Fort Atkinson, Wisconsin seems incomplete?

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