Gillian Lee Hsieh, MD - Medicare Gynecological Oncology in Mountain View, CA

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Gillian Lee Hsieh, MD is a medicare enrolled "Obstetrics & Gynecology" physician in Mountain View, California. She went to Baylor College Of Medicine and graduated in 2011 and has 14 years of diverse experience with area of expertise as Gynecological Oncology. She is a member of the group practice Sutter Bay Medical Foundation and her current practice location is 2490 Hospital Dr Ste 111, Mountain View, California. You can reach out to her office (for appointments etc.) via phone at (650) 934-7520.

Gillian Lee Hsieh is licensed to practice in California (license number A134657) and she also participates in the medicare program. She accepts medicare assignments (which means she accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and her NPI Number is 1063765576.

Contact Information

Gillian Lee Hsieh, MD
2490 Hospital Dr Ste 111,
Mountain View, CA 94040-4126
(650) 934-7520
Not Available

Map and Direction




Physician's Profile

Full NameGillian Lee Hsieh
GenderFemale
SpecialityGynecological Oncology
Experience14 Years
Location2490 Hospital Dr Ste 111, Mountain View, California
Accepts Medicare AssignmentsYes. She accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Gillian Lee Hsieh attended and graduated from Baylor College Of Medicine in 2011
  NPI Data:
  • NPI Number: 1063765576
  • Provider Enumeration Date: 10/22/2012
  • Last Update Date: 09/11/2025
  Medicare PECOS Information:
  • PECOS PAC ID: 5991023327
  • Enrollment ID: I20150416000170

Medical Identifiers

Medical identifiers for Gillian Lee Hsieh such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1063765576NPI-NPPES
BP10039750OtherTXTEXAS PHYSICIAN IN TRAINING

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207V00000XObstetrics & Gynecology A134657 (California)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
El Camino HospitalMountain view, CAHospital
Community Hospital Of The Monterey PeninsulaMonterey, CAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Sutter Bay Medical Foundation42845387783318

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Gillian Lee Hsieh allows following entities to bill medicare on her behalf.
Entity NameSutter Bay Medical Foundation
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1013950807
PECOS PAC ID: 4284538778
Enrollment ID: O20031125000909
Entity NameSutter Bay Medical Foundation
Entity TypePart B Supplier - Ambulatory Surgical Center
Entity IdentifiersNPI Number: 1982845186
PECOS PAC ID: 4284538778
Enrollment ID: O20090501000247
Entity NameSutter Bay Medical Foundation
Entity TypePart B Supplier - Ambulatory Surgical Center
Entity IdentifiersNPI Number: 1104067115
PECOS PAC ID: 4284538778
Enrollment ID: O20090501000456
Entity NameSutter Bay Medical Foundation
Entity TypePart B Supplier - Ambulatory Surgical Center
Entity IdentifiersNPI Number: 1497996524
PECOS PAC ID: 4284538778
Enrollment ID: O20090506000097
Entity NameSutter Bay Medical Foundation
Entity TypePart B Supplier - Ambulatory Surgical Center
Entity IdentifiersNPI Number: 1568851327
PECOS PAC ID: 4284538778
Enrollment ID: O20170927001545

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Gillian Lee Hsieh is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Gillian Lee Hsieh, MD
2350 W El Camino Real Fl 2,
Mountain View, CA 94040-6203

Ph: () -		Gillian Lee Hsieh, MD
2490 Hospital Dr Ste 111,
Mountain View, CA 94040-4126

Ph: (650) 934-7520

Reviews and Comments


Obstetrics & Gynecology Doctors in Mountain View, CA

Per Sandberg, M.D
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Medicare: Accepting Medicare Assignments
Practice Location: 2485 Hospital Drive, Suite 231, Mountain View, CA 94040
Phone: 650-934-7000    
Liza Kunz, MD
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Medicare: Not Enrolled in Medicare
Practice Location: 2485 Hospital Drive, Ste 231, Mountain View, CA 94040
Phone: 650-404-8210    
Andrea Aslan, MD
Obstetrics & Gynecology
Medicare: Accepting Medicare Assignments
Practice Location: 555 Castro St, Mountain View, CA 94041
Phone: 650-903-3000    
Dr. Christina Katherine Lam, D.O.
Obstetrics & Gynecology
Medicare: Accepting Medicare Assignments
Practice Location: 2495 Hospital Dr Ste 670, Mountain View, CA 94040
Phone: 650-396-8110    Fax: 650-336-7359
Karla Daniela Guerrero-hall, M.D.
Obstetrics & Gynecology
Medicare: Accepting Medicare Assignments
Practice Location: 2495 Hospital Dr Ste 625, Mountain View, CA 94040
Phone: 650-988-7470    
Barbara Ann Phelps-sandall, MD
Obstetrics & Gynecology
Medicare: Accepting Medicare Assignments
Practice Location: 2485 Hospital Dr, Suite #321, Mountain View, CA 94040
Phone: 650-988-7830    Fax: 650-966-9207

Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

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