Ann Wong, MD
Obstetrics & Gynecology Physician · Sunnyvale, CA
Ann Wong, MD is an obstetrics & gynecology physician with a practice address in Sunnyvale, California, and NPI 1093815607, issued on Sep 24, 2006. Check the license (California A60127, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Ann Wong
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- A60127 CA
Self-reported in NPPES; status is on the state search - Practice location
- 877 W Fremont Ave Ste N, Sunnyvale, CA 94087
- Phone
- (408) 730-4240
- Enumerated
- Sep 24, 2006
- Record last updated
- Dec 22, 2011 (not updated in 15 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 5,088 in California → Look up another NPI →
Also registered at 877 W Fremont Ave Ste N
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Hung Ecklund, MDObstetrics & Gynecology Physician1689722621
Verify Ann Wong in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A60127Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
91% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
15 Medicare Part D claims, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Ann Wong among 5,088 obstetrics & gynecology physician records in California
Ann Wong, MD is one of 5,088 obstetrics & gynecology physician records with a practice address in California. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 52% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileNo · 53% of these records are
- Record last updated2011 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Obstetrics & Gynecology Physician providers in California
There are 5,088 obstetrics & gynecology physician records in California.
All 5,088 in California → Every provider in Sunnyvale → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Hung Ecklund, MDSunnyvale, CA 940871689722621
- Kenneth Grolle, MDSunnyvale, CA 940871053416875
- Cheryl Vu, MDSunnyvale, CA 940871093823734
- Karen White, MDSunnyvale, CA 940871124244223
- Nirmala Bhat, MDSunnyvale, CA 940861528031051
- Ira Chan, M.D.Sunnyvale, CA 940861972618866
- Erin Chong, M.D.Sunnyvale, CA 940861407111271
- Sabiya Raja, MD, MPHSunnyvale, CA 940861992098701
Common questions
What is Ann Wong, MD's NPI number?
Ann Wong, MD's National Provider Identifier (NPI) is 1093815607, issued on Sep 24, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Ann Wong, MD located?
The NPPES record lists a practice address at 877 W Fremont Ave Ste N, Sunnyvale, CA, 94087. Phone: (408) 730-4240. Providers update this record themselves, so call before visiting.
How can I verify Ann Wong, MD's license?
NPPES lists California license number A60127, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Ann Wong, MD prescribe under Medicare Part D?
In 2024, Ann Wong, MD had 15 Medicare Part D claims; the average among obstetrics & gynecology physician prescribers was 165. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.