Gillian Lee Hsieh, MD
Obstetrics & Gynecology Physician · Mountain View, CA
Gillian Lee Hsieh, MD is an obstetrics & gynecology physician with a practice address in Mountain View, California, and NPI 1063765576, issued on Oct 22, 2012. Check the license (California A134657, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gillian Lee Hsieh
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- A134657 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2490 Hospital Dr Ste 111, Mountain View, CA 94040
- Phone
- (650) 934-7520
- Enumerated
- Oct 22, 2012
- Record last updated
- Sep 11, 2025
- Medicare enrollment
- Enrolled (PECOS I20150416000170); accepts Medicare assignment
- Medical or professional school
- Baylor College Of Medicine, 2011
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 5,088 in California → Look up another NPI →
Also registered at 2490 Hospital Dr Ste 111
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Shannon Donegan, PA-CSurgical Physician Assistant1497264246
- Cassandra Martin, PA-CPhysician Assistant1063906360
- Sarah Piazza, PA-CSurgical Physician Assistant1255881561
- Sarah Sanches, PA-CSurgical Physician Assistant1922672567
- Erica Witek, PA-CSurgical Physician Assistant1801487095
- Reyna Zaver, PA-CPhysician Assistant1992573026
Verify Gillian Lee Hsieh in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A134657Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
28% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
118 Medicare Part D claims for 61 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims. 12 claims were for opioids.
Most prescribed
- Oxycodone-Acetaminophen11 claims
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.
Industry payments in 2024: $234.85
2 payments; by number, the most common kind was food and beverage; the largest payer was Myriad Genetic Laboratories, Inc. The 21,429 providers of this specialty with any payment received $1,030.61 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Sutter Bay Medical FoundationMountain View, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gillian Lee Hsieh among 5,088 obstetrics & gynecology physician records in California
Gillian Lee Hsieh, 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 2012, is newer than 75% of them.
- NPI issued2012 · 75% of these records are older, 22% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated2011 · median 2004 among the 2,700 with a school on file
- Record last updated2025 · 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).
49 obstetrics & gynecology physician records list a practice address in Mountain View
They are 49 of the 2,467 NPPES records with a practice address in Mountain View, and 5,088 obstetrics & gynecology physician records in California.
All 5,088 in California → Every provider in Mountain View → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Holly Beeman, MDMountain View, CA 940401447232210
- Un Hui Har, M.D.Mountain View, CA 940401861593253
- Richard Hill, MDMountain View, CA 940401568579878
- Catherine HillMountain View, CA 940401326155656
- Jenny-Jean Hua, MDMountain View, CA 940401740397074
- Takeshi Inouye, MDMountain View, CA 940401386751626
- Nina Jaki, MDMountain View, CA 940401982711222
- Yin Lim, MDMountain View, CA 940401306854526
Common questions
What is Gillian Lee Hsieh, MD's NPI number?
Gillian Lee Hsieh, MD's National Provider Identifier (NPI) is 1063765576, issued on Oct 22, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Gillian Lee Hsieh, MD located?
The NPPES record lists a practice address at 2490 Hospital Dr Ste 111, Mountain View, CA, 94040. Phone: (650) 934-7520. Providers update this record themselves, so call before visiting.
How can I verify Gillian Lee Hsieh, MD's license?
NPPES lists California license number A134657, 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 Gillian Lee Hsieh, MD prescribe under Medicare Part D?
In 2024, Gillian Lee Hsieh, MD had 118 Medicare Part D claims for 61 beneficiaries; 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.