Sandy Wong, M.D.
NPI 1396972956 · Internal Medicine Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sandy Wong, M.D. is a Internal Medicine Physician provider in San Francisco, CA (NPI 1396972956).
Provider details
- NPI number
- 1396972956
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- 250517 (MA)
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 tenure33% of score
16 yrs in NPPES registry
- Profile completeness33% of score
100% 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.
$25 across 1 record (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
- 2009-06-22
- Last updated
- 2018-01-18
Frequently asked questions
- What is Sandy Wong's NPI number?
- Sandy Wong's National Provider Identifier (NPI) is 1396972956, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sandy Wong's specialty?
- Sandy Wong is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Sandy Wong located?
- Sandy Wong's practice location on file with NPPES is 400 Parnassus Avenue, San Francisco, CA 94143.
- What is Sandy Wong's phone number?
- The practice phone number listed in the NPPES registry for Sandy Wong is (415) 353-2421.
- Does Sandy Wong accept Medicare?
- Sandy Wong is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sandy Wong's NPI active?
- Yes — Sandy Wong's NPI (1396972956) is active in the NPPES registry as of the last update on 2018-01-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.