William Friedenberg, MD
NPI 1841266491 · Hematology & Oncology Physician · Sayre, PA
William Friedenberg, MD is a Hematology & Oncology Physician provider in Sayre, PA (NPI 1841266491).
Provider details
- NPI number
- 1841266491
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- MD065579L (PA)
Specialties & taxonomies
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
- 2006-02-24
- Last updated
- 2009-05-29
Frequently asked questions
- What is William Friedenberg's NPI number?
- William Friedenberg's National Provider Identifier (NPI) is 1841266491, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Friedenberg's specialty?
- William Friedenberg is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is William Friedenberg located?
- William Friedenberg's practice location on file with NPPES is 1 Guthrie Sq, Sayre, PA 18840-1625.
- What is William Friedenberg's phone number?
- The practice phone number listed in the NPPES registry for William Friedenberg is (570) 888-5858.
- Is William Friedenberg's NPI active?
- Yes — William Friedenberg's NPI (1841266491) is active in the NPPES registry as of the last update on 2009-05-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.