Nicholas Gianaris, MD
NPI 1124555057 · Neonatal-Perinatal Medicine Physician · San Francisco, CA
Enrolled with Medicare as Order and Referring Only - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nicholas Gianaris, MD is a Neonatal-Perinatal Medicine Physician provider in San Francisco, CA (NPI 1124555057).
Provider details
- NPI number
- 1124555057
- Entity type
- Individual
- Primary specialty
- Neonatal-Perinatal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- A158217 (CA)
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
9 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 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 (1)
- 750 Welch Rd Ste 315Palo Alto, CA 94304-1510Phone: (650) 724-9653
Registry dates
- Enumerated
- 2017-05-23
- Last updated
- 2024-06-25
- Certified
- 2024-06-25
Frequently asked questions
- What is Nicholas Gianaris's NPI number?
- Nicholas Gianaris's National Provider Identifier (NPI) is 1124555057, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nicholas Gianaris's specialty?
- Nicholas Gianaris is listed in the NPPES registry with a primary specialty of Neonatal-Perinatal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Nicholas Gianaris located?
- Nicholas Gianaris's practice location on file with NPPES is 1101 Van Ness Ave, San Francisco, CA 94109-6919.
- What is Nicholas Gianaris's phone number?
- The practice phone number listed in the NPPES registry for Nicholas Gianaris is (415) 600-6000.
- Does Nicholas Gianaris accept Medicare?
- Nicholas Gianaris is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nicholas Gianaris's NPI active?
- Yes — Nicholas Gianaris's NPI (1124555057) is active in the NPPES registry as of the last update on 2024-06-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.