Greenwich Radiation Oncology
NPI 1013131903 · Radiation Oncology Physician · Rye, NY
Greenwich Radiation Oncology is a Radiation Oncology Physician organization in Rye, NY (NPI 1013131903).
Provider details
- NPI number
- 1013131903
- Entity type
- Organization
- Primary specialty
- Radiation Oncology PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Daniel Fass, Director of Radiation Oncologist(914) 848-8950
- License
- 032191 (CT)
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
- 2007-04-12
- Last updated
- 2009-03-26
Frequently asked questions
- What is Greenwich Radiation Oncology's NPI number?
- Greenwich Radiation Oncology's National Provider Identifier (NPI) is 1013131903, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Greenwich Radiation Oncology?
- Greenwich Radiation Oncology is classified in the NPPES registry as Radiation Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Greenwich Radiation Oncology located?
- Greenwich Radiation Oncology's practice location on file with NPPES is 1 Theall Road, Rye, NY 10580.
- What is Greenwich Radiation Oncology's phone number?
- The practice phone number listed in the NPPES registry for Greenwich Radiation Oncology is (914) 848-8950.
- Who is the authorized official for Greenwich Radiation Oncology?
- The authorized official listed on Greenwich Radiation Oncology's NPPES record is Daniel Fass, Director of Radiation Oncologist. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Greenwich Radiation Oncology's NPI active?
- Yes — Greenwich Radiation Oncology's NPI (1013131903) is active in the NPPES registry as of the last update on 2009-03-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.