William Fischer, M.D.
NPI 1275791907 · Radiation Oncology Physician · Hinsdale, IL
William Fischer, M.D. is a Radiation Oncology Physician provider in Hinsdale, IL (NPI 1275791907).
Provider details
- NPI number
- 1275791907
- Entity type
- Individual
- Primary specialty
- Radiation Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 36-044063 (IL)
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
18 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
- 2008-05-29
- Last updated
- 2008-05-30
Frequently asked questions
- What is William Fischer's NPI number?
- William Fischer's National Provider Identifier (NPI) is 1275791907, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Fischer's specialty?
- William Fischer is listed in the NPPES registry with a primary specialty of Radiation Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is William Fischer located?
- William Fischer's practice location on file with NPPES is 617 S Washington St, Hinsdale, IL 60521-4438.
- What is William Fischer's phone number?
- The practice phone number listed in the NPPES registry for William Fischer is (630) 325-7814.
- Is William Fischer's NPI active?
- Yes — William Fischer's NPI (1275791907) is active in the NPPES registry as of the last update on 2008-05-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.