Vivian Wan, DO
NPI 1659832251 · Obstetrics & Gynecology Physician · Mountain View, CA
Enrolled with Medicare as Practitioner - Obstetrics/Gynecology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Vivian Wan, DO is a Obstetrics & Gynecology Physician provider in Mountain View, CA (NPI 1659832251).
Provider details
- NPI number
- 1659832251
- Entity type
- Individual
- Primary specialty
- Obstetrics & Gynecology PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Female
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
7 yrs in NPPES registry
- Profile completeness33% of score
83% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$459 across 13 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2019-03-26
- Last updated
- 2024-10-02
- Certified
- 2024-10-02
Frequently asked questions
- What is Vivian Wan's NPI number?
- Vivian Wan's National Provider Identifier (NPI) is 1659832251, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Vivian Wan's specialty?
- Vivian Wan is listed in the NPPES registry with a primary specialty of Obstetrics & Gynecology Physician (Allopathic & Osteopathic Physicians).
- Where is Vivian Wan located?
- Vivian Wan's practice location on file with NPPES is 2495 Hospital Dr Ste 670, Mountain View, CA 94040-4187.
- What is Vivian Wan's phone number?
- The practice phone number listed in the NPPES registry for Vivian Wan is (650) 396-8110.
- Does Vivian Wan accept Medicare?
- Vivian Wan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Vivian Wan's NPI active?
- Yes — Vivian Wan's NPI (1659832251) is active in the NPPES registry as of the last update on 2024-10-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.