Jan Sy
NPI 1861068231 · Internal Medicine Physician · South San Francisco, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jan Sy is a Internal Medicine Physician provider in South San Francisco, CA (NPI 1861068231).
Provider details
- NPI number
- 1861068231
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- No
- License
- A193712 (CA)
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
5 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)
- 500 W Hospital RdFrench Camp, CA 95231-9693Phone: (209) 468-6937
Registry dates
- Enumerated
- 2021-05-27
- Last updated
- 2024-10-15
- Certified
- 2024-10-15
Frequently asked questions
- What is Jan Sy's NPI number?
- Jan Sy's National Provider Identifier (NPI) is 1861068231, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jan Sy's specialty?
- Jan Sy is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Jan Sy located?
- Jan Sy's practice location on file with NPPES is 1200 El Camino Real, South San Francisco, CA 94080-3208.
- What is Jan Sy's phone number?
- The practice phone number listed in the NPPES registry for Jan Sy is (650) 742-2000.
- Does Jan Sy accept Medicare?
- Jan Sy is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jan Sy's NPI active?
- Yes — Jan Sy's NPI (1861068231) is active in the NPPES registry as of the last update on 2024-10-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.