William Stephan, M.D., P.C.
NPI 1083644306 · Family Medicine Physician · Tonawanda, NY
William Stephan, M.D., P.C. is a Family Medicine Physician organization in Tonawanda, NY (NPI 1083644306).
Provider details
- NPI number
- 1083644306
- Entity type
- Organization
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- William Stephan, Owner(716) 875-7399
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 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
- 2006-07-03
- Last updated
- 2007-10-15
Frequently asked questions
- What is William Stephan, M.D., P.C.'s NPI number?
- William Stephan, M.D., P.C.'s National Provider Identifier (NPI) is 1083644306, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is William Stephan, M.D., P.C.?
- William Stephan, M.D., P.C. is classified in the NPPES registry as Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Stephan, M.D., P.C. located?
- William Stephan, M.D., P.C.'s practice location on file with NPPES is 4080 Delaware Ave, Tonawanda, NY 14150-6848.
- What is William Stephan, M.D., P.C.'s phone number?
- The practice phone number listed in the NPPES registry for William Stephan, M.D., P.C. is (716) 875-7399.
- Who is the authorized official for William Stephan, M.D., P.C.?
- The authorized official listed on William Stephan, M.D., P.C.'s NPPES record is William Stephan, Owner. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is William Stephan, M.D., P.C.'s NPI active?
- Yes — William Stephan, M.D., P.C.'s NPI (1083644306) is active in the NPPES registry as of the last update on 2007-10-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.