Dr Derek Frank Williams, MD - Medicare Family Practice in Hawthorne, CA

Dr Derek Frank Williams, MD is a medicare enrolled "Family Medicine" physician in Hawthorne, California. He went to University Of Missouri, Kansas City, School Of Medicine and graduated in 1994 and has 30 years of diverse experience with area of expertise as Family Practice. He is a member of the group practice Providence Medical Institute and his current practice location is 11633 Hawthorne Blvd, Suite 410, Hawthorne, California. You can reach out to his office (for appointments etc.) via phone at (310) 792-4450.

Dr Derek Frank Williams is licensed to practice in California (license number A72933) 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 1467405753.

Contact Information

Dr Derek Frank Williams, MD
11633 Hawthorne Blvd, Suite 410,
Hawthorne, CA 90250-2321
(310) 792-4450
(310) 792-4455

Map and Direction




Physician's Profile

Full NameDr Derek Frank Williams
GenderMale
SpecialityFamily Practice
Experience30 Years
Location11633 Hawthorne Blvd, Hawthorne, 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:
  • Dr Derek Frank Williams attended and graduated from University Of Missouri, Kansas City, School Of Medicine in 1994
  NPI Data:
  • NPI Number: 1467405753
  • Provider Enumeration Date: 05/18/2006
  • Last Update Date: 03/07/2023
  Medicare PECOS Information:
  • PECOS PAC ID: 3971521394
  • Enrollment ID: I20051103001219

Medical Identifiers

Medical identifiers for Dr Derek Frank Williams such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1467405753NPI-NPPES
00G157110MedicaidCA

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207Q00000XFamily Medicine A72933 (California)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Providence Little Company Of Mary Med Ctr TorranceTorrance, CAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Providence Medical Institute5991609737293

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 Derek Frank Williams allows following entities to bill medicare on his behalf.
Entity NameProvidence Medical Institute
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1417915760
PECOS PAC ID: 5991609737
Enrollment ID: O20031121000910

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 Derek Frank Williams 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 Derek Frank Williams, MD
11633 Hawthorne Blvd, Suite 410,
Hawthorne, CA 90250-2321

Ph: (310) 792-4450
Dr Derek Frank Williams, MD
11633 Hawthorne Blvd, Suite 410,
Hawthorne, CA 90250-2321

Ph: (310) 792-4450

Reviews and Comments


Family Medicine Doctors in Hawthorne, CA

Dr. Khalid B Khan, M.D.
Family Medicine
Medicare: May Accept Medicare Assignments
Practice Location: 13425 Inglewood Ave, Hawthorne, CA 90250
Phone: 310-679-2201    Fax: 310-679-4236
Dr. Stephan T Honda, M.D.
Family Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 2301 W El Segundo Blvd, Hawthorne, CA 90250
Phone: 323-757-2118    
Gregory Vanepps, D.O.
Family Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 3615 Jack Northrop Ave Ste 100, Hawthorne, CA 90250
Phone: 310-300-1051    Fax: 310-300-1052
Jennifer R. Chan, M.D.
Family Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 12618 Hawthorne Blvd., Hawthorne, CA 90250
Phone: 310-263-5700    
Janet Fahem Soliman, M.D.
Family Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 11946 Hawthorne Blvd, Hawthorne, CA 90250
Phone: 310-675-1136    Fax: 310-970-1447
Terry Ishihara, MD
Family Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 5400 W Rosecrans Ave, Ste 100, Hawthorne, CA 90250
Phone: 310-643-8500    Fax: 310-297-7863

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.