Janaki Ramanathan, MD
NPI 1275611873 · Diagnostic Radiology Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Janaki Ramanathan, MD is a Diagnostic Radiology Physician provider in San Francisco, CA (NPI 1275611873).
Provider details
- NPI number
- 1275611873
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 25MA08403700 (NJ)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
- Diagnostic Radiology Physician2085R0202X
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
12 documented practice locations
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
Additional practice locations (11)
- 3301 El Camino Real Ste 100Atherton, CA 94027-3803Phone: (650) 364-3080Fax: (650) 364-2004
- 250 Bon Air RdGreenbrae, CA 94904-1702Phone: (415) 925-7301Fax: (415) 925-7317
- 180 Rowland WayNovato, CA 94945-5009Phone: (415) 209-1500Fax: (415) 209-1501
- 180 Rowland WayNovato, CA 94945-5009Phone: (415) 209-1500Fax: (415) 209-1501
- 1101 Van Ness Ave Fl 3San Francisco, CA 94109-6919Phone: (415) 600-3232Fax: (415) 447-6335
- 347 Andrieux StSonoma, CA 95476-6811Phone: (707) 935-5265Fax: (707) 935-5438
- 181 W Meadow Dr Ste 100Vail, CO 81657-5058Phone: (970) 479-7252
- 2808 S 143rd PlzOmaha, NE 68144-5611Phone: (402) 609-1800
Registry dates
- Enumerated
- 2006-11-01
- Last updated
- 2020-09-23
- Certified
- 2020-09-23
Frequently asked questions
- What is Janaki Ramanathan's NPI number?
- Janaki Ramanathan's National Provider Identifier (NPI) is 1275611873, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Janaki Ramanathan's specialty?
- Janaki Ramanathan is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Janaki Ramanathan located?
- Janaki Ramanathan's practice location on file with NPPES is 2351 Clay St Ste 100, San Francisco, CA 94115-1931.
- What is Janaki Ramanathan's phone number?
- The practice phone number listed in the NPPES registry for Janaki Ramanathan is (415) 600-3143.
- Does Janaki Ramanathan accept Medicare?
- Janaki Ramanathan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Janaki Ramanathan's NPI active?
- Yes — Janaki Ramanathan's NPI (1275611873) is active in the NPPES registry as of the last update on 2020-09-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.