Cathy Lynn Riker, MD - Medicare Rheumatology in Menlo Park, CA

Cathy Lynn Riker, MD is a medicare enrolled "Internal Medicine - Rheumatology" physician in Menlo Park, California. She went to Icahn School Of Medicine At Mount Sinai and graduated in 1986 and has 38 years of diverse experience with area of expertise as Rheumatology. She is a member of the group practice University Healthcare Alliance and her current practice location is 1300 Crane St, Menlo Park, California. You can reach out to her office (for appointments etc.) via phone at (650) 498-6500.

Cathy Lynn Riker is licensed to practice in California (license number G74920) and she also participates in the medicare program. She accepts medicare assignments (which means she accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and her NPI Number is 1255448189.

Contact Information

Cathy Lynn Riker, MD
1300 Crane St,
Menlo Park, CA 94025-4260
(650) 498-6500
Not Available

Map and Direction




Physician's Profile

Full NameCathy Lynn Riker
GenderFemale
SpecialityRheumatology
Experience38 Years
Location1300 Crane St, Menlo Park, California
Accepts Medicare AssignmentsYes. She accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Cathy Lynn Riker attended and graduated from Icahn School Of Medicine At Mount Sinai in 1986
  NPI Data:
  • NPI Number: 1255448189
  • Provider Enumeration Date: 08/24/2006
  • Last Update Date: 04/16/2024
  Medicare PECOS Information:
  • PECOS PAC ID: 1850456534
  • Enrollment ID: I20090212000260

Medical Identifiers

Medical identifiers for Cathy Lynn Riker such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1255448189NPI-NPPES
MMM00087MOtherNHIC

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine G74920 (California)Secondary
207RR0500XInternal Medicine - Rheumatology G74920 (California)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Stanford Health CareStanford, CAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
University Healthcare Alliance6305748799341

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. Cathy Lynn Riker allows following entities to bill medicare on her behalf.
Entity NameUniversity Healthcare Alliance
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1760531198
PECOS PAC ID: 6305748799
Enrollment ID: O20040126000292

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. Cathy Lynn Riker 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
Cathy Lynn Riker, MD
1300 Crane St,
Menlo Park, CA 94025-4260

Ph: (650) 498-6500
Cathy Lynn Riker, MD
1300 Crane St,
Menlo Park, CA 94025-4260

Ph: (650) 498-6500

Reviews and Comments


Internal Medicine Doctors in Menlo Park, CA

Marc Joseph Gurwith, M.D.
Rheumatology
Medicare: Not Enrolled in Medicare
Practice Location: 1100 Alma St Ste 109, Menlo Park, CA 94025
Phone: 650-823-1548    
Eliza Gaenger Bennitt, MD
Rheumatology
Medicare: Accepting Medicare Assignments
Practice Location: 1300 Crane St, Menlo Park, CA 94025
Phone: 650-498-6649    
Helen M Pillsbury, MD
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Medicare: Medicare Enrolled
Practice Location: 401 Burgess Dr Ste B, 2nd Floor, Menlo Park, CA 94025
Phone: 650-325-9906    Fax: 650-325-1295
Victoria Y Chen, MD
Rheumatology
Medicare: Accepting Medicare Assignments
Practice Location: 1300 Crane St, Menlo Park, CA 94025
Phone: 650-498-6500    
Dr. Eileen V. Moy, MD
Rheumatology
Medicare: Accepting Medicare Assignments
Practice Location: 1300 Crane St, Menlo Park, CA 94025
Phone: 650-498-6166    
Ping Wang Fisher, MD
Rheumatology
Medicare: Accepting Medicare Assignments
Practice Location: 1300 Crane Street, Menlo Park, CA 94025
Phone: 650-498-6500    
Dr. Harvey S Young, M.D.
Rheumatology
Medicare: Accepting Medicare Assignments
Practice Location: 1225 Crane St Ste 202, Menlo Park, CA 94025
Phone: 650-324-8881    Fax: 650-324-8088

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.