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William Petersen, MD
NPI 1225050891 · Family Medicine Physician · Walker, MN
William Petersen, MD is a Family Medicine Physician provider in Walker, MN (NPI 1225050891).
Provider details
- NPI number
- 1225050891
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 29875 (MN)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(91/100 index)
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
614 Michigan Ave
Walker, MN 56484-1390
Phone: (218) 547-3938
Fax: (218) 547-3922
Street-level locationGet directions
Mailing address
614 Michigan Ave
Walker, MN 56484-1390
Registry dates
- Enumerated
- 2006-07-24
- Last updated
- 2011-11-18
Frequently asked questions
- What is William Petersen's NPI number?
- William Petersen's National Provider Identifier (NPI) is 1225050891, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Petersen's specialty?
- William Petersen is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Petersen located?
- William Petersen's practice location on file with NPPES is 614 Michigan Ave, Walker, MN 56484-1390.
- What is William Petersen's phone number?
- The practice phone number listed in the NPPES registry for William Petersen is (218) 547-3938.
- Is William Petersen's NPI active?
- Yes — William Petersen's NPI (1225050891) is active in the NPPES registry as of the last update on 2011-11-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.