IndividualActive
Subir Nag, MD
NPI 1962552778 · Radiation Oncology Physician · Santa Clara, CA
Subir Nag, MD is a Radiation Oncology Physician provider in Santa Clara, CA (NPI 1962552778).
Provider details
- NPI number
- 1962552778
- Entity type
- Individual
- Primary specialty
- Radiation Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- C52379 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(90/100 index)
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
900 Kiely Blvd
Santa Clara, CA 95051-5329
Phone: (408) 236-6400
Street-level locationGet directions
Mailing address
1800 Harrison St Fl 7
Oakland, CA 94612-3429
Registry dates
- Enumerated
- 2007-01-12
- Last updated
- 2007-07-08
Frequently asked questions
- What is Subir Nag's NPI number?
- Subir Nag's National Provider Identifier (NPI) is 1962552778, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Subir Nag's specialty?
- Subir Nag is listed in the NPPES registry with a primary specialty of Radiation Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Subir Nag located?
- Subir Nag's practice location on file with NPPES is 900 Kiely Blvd, Santa Clara, CA 95051-5329.
- What is Subir Nag's phone number?
- The practice phone number listed in the NPPES registry for Subir Nag is (408) 236-6400.
- Is Subir Nag's NPI active?
- Yes — Subir Nag's NPI (1962552778) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.