Richard Williams, MD - Internal Medicine in San Marino, CA

Richard Williams, MD is a Internal Medicine physician based in San Marino, California. Richard Williams is licensed to practice in California (license number G58242) and his current practice location is 375 Huntington Dr, Suite G, San Marino, California. He can be reached at his office (for appointments etc.) via phone at (626) 441-4231.

NPI number for Richard Williams is 1972577690 and his current mailing address is 145 Vista Ave, Suite 104, Pasadena, California. He does not participate in medicare program and thus does not accept medicare assignments. His NPI Number is 1972577690.

Contact Information

Richard Williams, MD
375 Huntington Dr, Suite G,
San Marino, CA 91108-2357
(626) 441-4231
(626) 441-0282

Map and Direction




Physician's Profile

Full NameRichard Williams
GenderMale
SpecialityInternal Medicine
Location375 Huntington Dr, San Marino, California
Accepts Medicare AssignmentsDoes not participate in Medicare Program. He may not accept medicare assignment.
  NPI Data:
  • NPI Number: 1972577690
  • Provider Enumeration Date: 02/17/2006
  • Last Update Date: 07/08/2007

Medical Identifiers

Medical identifiers for Richard Williams such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1972577690NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine G58242 (California)Primary

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. Richard Williams is NOT enrolled with medicare and thus cannot prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Richard Williams, MD
145 Vista Ave, Suite 104,
Pasadena, CA 91107-3607

Ph: (626) 397-8335
Richard Williams, MD
375 Huntington Dr, Suite G,
San Marino, CA 91108-2357

Ph: (626) 441-4231

Reviews and Comments


Internal Medicine Doctors in San Marino, CA

Ms. Sabrina Hong, MD
Internal Medicine
Medicare: Medicare Enrolled
Practice Location: 1946 Montrobles Pl, San Marino, CA 91108
Phone: 626-354-4058    
Dr. Samuel Kai Fong Zia, M.D.
Internal Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 1920 Alhambra Rd, San Marino, CA 91108
Phone: 626-282-5055    Fax: 626-282-5055
Derek Cheung, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 375 Huntington Dr Ste G, San Marino, CA 91108
Phone: 626-441-4231    
Dr. Thomas J Maxwell, M.D.
Internal Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 1505 Kensington Rd, San Marino, CA 91108
Phone: 626-449-2455    
Dr. Asif Mahmood, M.D
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 375 Huntington Dr, E, San Marino, CA 91108
Phone: 626-578-0283    Fax: 626-578-9416
Paul T Liu, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 2233 Huntington Dr Ste 10, San Marino, CA 91108
Phone: 626-796-0821    Fax: 626-796-0619
Dr. Sonya M Ehresmann, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 375 Huntington Dr Ste G, San Marino, CA 91108
Phone: 626-441-4231    Fax: 626-441-0282

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.