Phyllis Tien, - Medicare Internal Medicine in San Francisco, CA

Phyllis Tien, is a medicare enrolled "Internal Medicine - Infectious Disease" physician in San Francisco, California. Her current practice location is 4150 Clement St, Infectious Diseases Section 111w, San Francisco, California. You can reach out to her office (for appointments etc.) via phone at (415) 221-4810.

Phyllis Tien is licensed to practice in California (license number G077758) and she also participates in the medicare program. She does not accept medicare assignments directly but she may accept medicare through third-party (refer to Reassignment section below) and may also prescribe medicare part D drugs. Her NPI Number is 1346358835.

Contact Information

Phyllis Tien,
4150 Clement St, Infectious Diseases Section 111w,
San Francisco, CA 94121-1545
(415) 221-4810
(415) 379-5523

Map and Direction




Physician's Profile

Full NamePhyllis Tien
GenderFemale
SpecialityInternal Medicine - Infectious Disease
Location4150 Clement St, San Francisco, California
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1346358835
  • Provider Enumeration Date: 08/26/2006
  • Last Update Date: 07/17/2007
  Medicare PECOS Information:
  • PECOS PAC ID: 3971722943
  • Enrollment ID: I20220502002051

Medical Identifiers

Medical identifiers for Phyllis Tien such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1346358835NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RI0200XInternal Medicine - Infectious Disease G077758 (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. Phyllis Tien allows following entities to bill medicare on her behalf.
Entity NameRegents Of The University Of California
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1881763597
PECOS PAC ID: 4284547274
Enrollment ID: O20031106000389
Entity NameUniversity Of California San Francisco
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1861578973
PECOS PAC ID: 4486567229
Enrollment ID: O20031212000897
Entity NameUcsf Medical Group Business Services
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1477624104
PECOS PAC ID: 3779497870
Enrollment ID: O20040622001513

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. Phyllis Tien 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
Phyllis Tien,
4150 Clement St, Infectious Diseases Section 111w,
San Francisco, CA 94121-1545

Ph: (415) 221-4810
Phyllis Tien,
4150 Clement St, Infectious Diseases Section 111w,
San Francisco, CA 94121-1545

Ph: (415) 221-4810

Reviews and Comments


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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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