Dr Catharine Teresa Clark-sayles, MD - Medicare Internal Medicine in Greenbrae, CA

Dr Catharine Teresa Clark-sayles, MD is a medicare enrolled "Internal Medicine" physician in Greenbrae, California. Her current practice location is 1341 S Eliseo Dr, Suite 200, Greenbrae, California. You can reach out to her office (for appointments etc.) via phone at (415) 464-8176.

Dr Catharine Teresa Clark-sayles is licensed to practice in California (license number G49182) 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 1518952860.

Contact Information

Dr Catharine Teresa Clark-sayles, MD
1341 S Eliseo Dr, Suite 200,
Greenbrae, CA 94904-2000
(415) 464-8176
(415) 464-8177

Map and Direction




Physician's Profile

Full NameDr Catharine Teresa Clark-sayles
GenderFemale
SpecialityInternal Medicine
Location1341 S Eliseo Dr, Greenbrae, California
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1518952860
  • Provider Enumeration Date: 09/13/2005
  • Last Update Date: 06/23/2009
  Medicare PECOS Information:
  • PECOS PAC ID: 4082694260
  • Enrollment ID: I20040720001553

Medical Identifiers

Medical identifiers for Dr Catharine Teresa Clark-sayles such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1518952860NPI-NPPES
00G491820MedicaidCA

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine G49182 (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 Catharine Teresa Clark-sayles allows following entities to bill medicare on her behalf.
Entity NameMarin Healthcare District
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1659609964
PECOS PAC ID: 5698818011
Enrollment ID: O20100208000538
Entity NameRegents Univ Of California Ucsf
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1124439807
PECOS PAC ID: 6305160300
Enrollment ID: O20150122001375

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 Catharine Teresa Clark-sayles 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 Catharine Teresa Clark-sayles, MD
1341 S Eliseo Dr, Suite 200,
Greenbrae, CA 94904-2000

Ph: (415) 464-8176
Dr Catharine Teresa Clark-sayles, MD
1341 S Eliseo Dr, Suite 200,
Greenbrae, CA 94904-2000

Ph: (415) 464-8176

Reviews and Comments


Internal Medicine Doctors in Greenbrae, CA

Dr. Albert A Varner, MD
Internal Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 1350 S Eliseo Dr, Ste 130, Greenbrae, CA 94904
Phone: 415-925-6900    Fax: 415-925-6919
Dr. Kerry Lynn Davidson, M.D.
Internal Medicine
Medicare: Medicare Enrolled
Practice Location: 250 Bon Air Rd, 3rd Floor, Greenbrae, CA 94904
Phone: 415-925-7545    Fax: 415-925-7008
Timothy M Sowerby, MD
Internal Medicine
Medicare: May Accept Medicare Assignments
Practice Location: 1350 S Eliseo Dr, Ste 130, Greenbrae, CA 94904
Phone: 415-925-6900    Fax: 415-925-6919
Dr. Janeen Smith, M.D.
Internal Medicine
Medicare: Medicare Enrolled
Practice Location: 250 Bon Air Rd, 3rd Floor, Greenbrae, CA 94904
Phone: 415-925-7545    Fax: 415-925-7008
Dr. Maryam Ziaie Matin, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 501 Via Casitas, Greenbrae, CA 94904
Phone: 415-464-1771    Fax: 415-464-1158
Dr. Suhaila Nawabi, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 250 Bon Air Rd, Greenbrae, CA 94904
Phone: 415-925-7000    
Mark Kubik, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 501 Via Casitas, Greenbrae, CA 94904
Phone: 415-464-1770    Fax: 415-464-1158

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.