Wendy Si, M.D
NPI 1043674823 · Neonatal-Perinatal Medicine Physician · Palo Alto, CA
Enrolled with Medicare as Practitioner - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Wendy Si, M.D is a Neonatal-Perinatal Medicine Physician provider in Palo Alto, CA (NPI 1043674823).
Provider details
- NPI number
- 1043674823
- Entity type
- Individual
- Primary specialty
- Neonatal-Perinatal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D
- Sex
- Female
- Sole proprietor
- No
- License
- A162129 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
10 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
- 2016-04-07
- Last updated
- 2024-04-29
- Certified
- 2024-04-29
Frequently asked questions
- What is Wendy Si's NPI number?
- Wendy Si's National Provider Identifier (NPI) is 1043674823, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Wendy Si's specialty?
- Wendy Si is listed in the NPPES registry with a primary specialty of Neonatal-Perinatal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Wendy Si located?
- Wendy Si's practice location on file with NPPES is 725 Welch Rd, Palo Alto, CA 94304-1601.
- What is Wendy Si's phone number?
- The practice phone number listed in the NPPES registry for Wendy Si is (650) 497-8000.
- Does Wendy Si accept Medicare?
- Wendy Si is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Wendy Si's NPI active?
- Yes — Wendy Si's NPI (1043674823) is active in the NPPES registry as of the last update on 2024-04-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.