John Kok-sen Chan, MD - Medicare Ophthalmology in Union City, CA

John Kok-sen Chan, MD is a medicare enrolled "Ophthalmology" physician in Union City, California. He went to New York Medical College and graduated in 1997 and has 27 years of diverse experience with area of expertise as Ophthalmology. He is a member of the group practice Permanente Medical Group Inc and his current practice location is 3553 Whipple Rd, Union City, California. You can reach out to his office (for appointments etc.) via phone at (510) 454-1000.

John Kok-sen Chan is licensed to practice in California (license number A70464) and he also participates in the medicare program. He accepts medicare assignments (which means he accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and his NPI Number is 1609928837.

Contact Information

John Kok-sen Chan, MD
3553 Whipple Rd,
Union City, CA 94587-1507
(510) 454-1000
Not Available

Map and Direction




Physician's Profile

Full NameJohn Kok-sen Chan
GenderMale
SpecialityOphthalmology
Experience27 Years
Location3553 Whipple Rd, Union City, California
Accepts Medicare AssignmentsYes. He accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • John Kok-sen Chan attended and graduated from New York Medical College in 1997
  NPI Data:
  • NPI Number: 1609928837
  • Provider Enumeration Date: 01/17/2007
  • Last Update Date: 12/06/2021
  Medicare PECOS Information:
  • PECOS PAC ID: 4082894076
  • Enrollment ID: I20110208000826

Medical Identifiers

Medical identifiers for John Kok-sen Chan such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1609928837NPI-NPPES
00A704640MedicaidCA

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207W00000XOphthalmology A70464 (California)Primary

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Permanente Medical Group Inc89219102258376

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. John Kok-sen 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. John Kok-sen 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
John Kok-sen Chan, MD
3553 Whipple Rd,
Union City, CA 94587-1507

Ph: (510) 454-1000
John Kok-sen Chan, MD
3553 Whipple Rd,
Union City, CA 94587-1507

Ph: (510) 454-1000

Reviews and Comments


Ophthalmology Doctors in Union City, CA

Catherine Michele Knox, M.D.
Ophthalmology
Medicare: Accepting Medicare Assignments
Practice Location: 3553 Whipple Rd, Union City, CA 94587
Phone: 510-454-1000    
Jeffrey Mark Lehmer, M.D.
Ophthalmology
Medicare: Medicare Enrolled
Practice Location: 3553 Whipple Rd, Union City, CA 94587
Phone: 510-454-1000    
James Michael Lahey, M.D.
Ophthalmology
Medicare: Not Enrolled in Medicare
Practice Location: 3553 Whipple Rd, Union City, CA 94587
Phone: 510-454-1000    
Franklin Jeng, MD
Ophthalmology
Medicare: Medicare Enrolled
Practice Location: 3553 Whipple Rd Bldg B1, Union City, CA 94587
Phone: 510-675-2020    
Michael Chin-wah Fang-yen, M.D.
Ophthalmology
Medicare: Accepting Medicare Assignments
Practice Location: 3553 Whipple Rd, Union City, CA 94587
Phone: 510-454-1000    
Kristina Heidi Austin, M.D.
Ophthalmology
Medicare: Accepting Medicare Assignments
Practice Location: 3553 Whipple Rd, Union City, CA 94587
Phone: 510-454-1000    
Kari Mcmorrow Eisley, M.D.
Ophthalmology
Medicare: Accepting Medicare Assignments
Practice Location: 3553 Whipple Rd, Union City, CA 94587
Phone: 510-454-1000    Fax: 412-647-9607

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.