Eugene Ty Chan, MD - Medicare Internal Medicine in Walnut Creek, CA

Eugene Ty Chan, MD is a medicare enrolled "Internal Medicine - Gastroenterology" physician in Walnut Creek, California. His current practice location is 1425 S Main St, Walnut Creek, California. You can reach out to his office (for appointments etc.) via phone at (925) 295-4000.

Eugene Ty Chan is licensed to practice in California (license number G53188) 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 1528146610.

Contact Information

Eugene Ty Chan, MD
1425 S Main St,
Walnut Creek, CA 94596-5318
(925) 295-4000
Not Available

Map and Direction




Physician's Profile

Full NameEugene Ty Chan
GenderMale
SpecialityInternal Medicine - Gastroenterology
Location1425 S Main St, Walnut Creek, California
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1528146610
  • Provider Enumeration Date: 11/02/2006
  • Last Update Date: 07/08/2007
  Medicare PECOS Information:
  • PECOS PAC ID: 1850571084
  • Enrollment ID: I20110204000870

Medical Identifiers

Medical identifiers for Eugene Ty Chan such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1528146610NPI-NPPES
00G531880MedicaidCA

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RG0100XInternal Medicine - Gastroenterology G53188 (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. Eugene Ty Chan allows following entities to bill medicare on his behalf.
Entity NamePermanente Medical Group Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1073606299
PECOS PAC ID: 8921910225
Enrollment ID: O20031104000710

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. Eugene Ty Chan 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
Eugene Ty Chan, MD
1800 Harrison St Fl 7,
Oakland, CA 94612-3429

Ph: (510) 625-6262
Eugene Ty Chan, MD
1425 S Main St,
Walnut Creek, CA 94596-5318

Ph: (925) 295-4000

Reviews and Comments


Internal Medicine Doctors in Walnut Creek, CA

Dr. Joseph Patrick Henry, M.D.
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Phone: 510-409-6511    Fax: 719-941-8247
Mr. Ramin Khashayar, MD
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Phone: 925-939-3050    Fax: 925-939-3057
Dr. Hennessey Tseng, M.D.
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Practice Location: 1450 Treat Blvd, Suite 220b, Walnut Creek, CA 94597
Phone: 925-937-1770    Fax: 925-937-0630
Dr. Ali-reza Barmaki, M.D.
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Medicare: May Accept Medicare Assignments
Practice Location: 1220 Rossmoor Pkwy, Walnut Creek, CA 94595
Phone: 925-947-3393    Fax: 925-947-3396
Dr. Cynthia M. Mullen, M.D.
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Medicare: Accepting Medicare Assignments
Practice Location: 2637 Shadelands Dr, Walnut Creek, CA 94598
Phone: 925-322-2372    Fax: 925-322-6720
Mr. David Nathanson,
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Medicare: Medicare Enrolled
Practice Location: 320 Lennon Ln, Walnut Creek, CA 94598
Phone: 925-906-2000    
Mark D Nathan, MD
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 106 La Casa Via, #140, Walnut Creek, CA 94598
Phone: 925-274-2860    Fax: 925-932-4527

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.