William Polkinghorn, MD
NPI 1821125287 · Radiation Oncology Physician · New York, NY
William Polkinghorn, MD is a Radiation Oncology Physician provider in New York, NY (NPI 1821125287).
Provider details
- NPI number
- 1821125287
- Entity type
- Individual
- Primary specialty
- Radiation Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- L-229339 (MA)
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
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
- 2007-02-27
- Last updated
- 2012-07-19
Frequently asked questions
- What is William Polkinghorn's NPI number?
- William Polkinghorn's National Provider Identifier (NPI) is 1821125287, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Polkinghorn's specialty?
- William Polkinghorn is listed in the NPPES registry with a primary specialty of Radiation Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is William Polkinghorn located?
- William Polkinghorn's practice location on file with NPPES is 1275 York Ave, New York, NY 10065-6007.
- What is William Polkinghorn's phone number?
- The practice phone number listed in the NPPES registry for William Polkinghorn is (212) 639-2000.
- Is William Polkinghorn's NPI active?
- Yes — William Polkinghorn's NPI (1821125287) is active in the NPPES registry as of the last update on 2012-07-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.