William Cannon, MD
NPI 1912971243 · Internal Medicine Physician · Fort Atkinson, WI
William Cannon, MD is a Internal Medicine Physician provider in Fort Atkinson, WI (NPI 1912971243).
Provider details
- NPI number
- 1912971243
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 36081211 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-02-14
- Last updated
- 2022-10-07
- Certified
- 2022-10-07
Frequently asked questions
- What is William Cannon's NPI number?
- William Cannon's National Provider Identifier (NPI) is 1912971243, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Cannon's specialty?
- William Cannon is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Cannon located?
- William Cannon's practice location on file with NPPES is 500 Mcmillen St, Fort Atkinson, WI 53538-1233.
- What is William Cannon's phone number?
- The practice phone number listed in the NPPES registry for William Cannon is (920) 563-5571.
- Is William Cannon's NPI active?
- Yes — William Cannon's NPI (1912971243) is active in the NPPES registry as of the last update on 2022-10-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.