Dr Gregory B Hammer, MD - Medicare Anesthesiology in Stanford, CA

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Dr Gregory B Hammer, MD is a medicare enrolled "Anesthesiology" physician in Stanford, California. His current practice location is 300 Pasteur Dr, H3580 Mc 5640, Stanford, California. You can reach out to his office (for appointments etc.) via phone at (650) 723-7835.

Dr Gregory B Hammer is licensed to practice in California (license number G51413) and he also participates in the medicare program. He does not accept medicare assignments directly but he may accept medicare through third-party (refer to Reassignment section below) and may also prescribe medicare part D drugs. His NPI Number is 1396885455.

Contact Information

Dr Gregory B Hammer, MD
300 Pasteur Dr, H3580 Mc 5640,
Stanford, CA 94305-2200
(650) 723-7835
Not Available

Map and Direction




Physician's Profile

Full NameDr Gregory B Hammer
GenderMale
SpecialityAnesthesiology
Location300 Pasteur Dr, Stanford, California
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1396885455
  • Provider Enumeration Date: 02/07/2007
  • Last Update Date: 07/08/2007
  Medicare PECOS Information:
  • PECOS PAC ID: 5890891808
  • Enrollment ID: I20070508000730

Medical Identifiers

Medical identifiers for Dr Gregory B Hammer such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1396885455NPI-NPPES
00G514130MedicaidCA

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207L00000XAnesthesiology G51413 (California)Primary

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. Dr Gregory B Hammer allows following entities to bill medicare on his behalf.
Entity NameStanford Health Care
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1437292927
PECOS PAC ID: 6709797491
Enrollment ID: O20031124000348
Entity NameLpch Medical Group Div Of Lucile
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1417907940
PECOS PAC ID: 0840298543
Enrollment ID: O20061113000232

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. Dr Gregory B Hammer 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
Dr Gregory B Hammer, MD
2680 Hanover St,
Palo Alto, CA 94304-1117

Ph: (650) 498-7103		Dr Gregory B Hammer, MD
300 Pasteur Dr, H3580 Mc 5640,
Stanford, CA 94305-2200

Ph: (650) 723-7835

Reviews and Comments


Anesthesiology Doctors in Stanford, CA

Melissa Ann Vogelsong, MD
Anesthesiology
Medicare: Accepting Medicare Assignments
Practice Location: 300 Pasteur Dr, Room Hc435, Stanford, CA 94305
Phone: 650-723-4000    
Soniya Sharma, MD, FRCPC
Anesthesiology
Medicare: Accepting Medicare Assignments
Practice Location: 300 Pasteur Dr, Stanford, CA 94305
Phone: 650-723-4000    
Dr. Isobel A. Russell, MD
Anesthesiology
Medicare: Not Enrolled in Medicare
Practice Location: 300 Pasteur Dr, Stanford, CA 94305
Phone: 650-723-4000    
Ronald Gary Pearl, MD, PHD
Anesthesiology
Medicare: Accepting Medicare Assignments
Practice Location: 300 Pasteur Dr, Stanford, CA 94305
Phone: 650-723-5024    Fax: 650-725-0009
Dr. Jesse Ephraim Goldmacher, MD
Anesthesiology
Medicare: Not Enrolled in Medicare
Practice Location: 300 Pasteur Dr Rm H3589, Stanford, CA 94305
Phone: 647-825-8726    Fax: 650-725-0009
Cornel Chiu, MD
Anesthesiology
Medicare: Medicare Enrolled
Practice Location: 300 Pasteur Dr, Stanford, CA 94305
Phone: 650-723-4000    
Steven Louis Shafer, MD
Anesthesiology
Medicare: Accepting Medicare Assignments
Practice Location: 300 Pasteur Dr, Stanford, CA 94305
Phone: 650-723-4000    Fax: 650-887-2203

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).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.