Derek Frank Williams, M.D.
Family Medicine Physician · Hawthorne, CA
Derek Frank Williams, M.D. is a family medicine physician with a practice address in Hawthorne, California, and NPI 1467405753, issued on May 18, 2006. Check the license (California A72933, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Derek Frank Williams
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- A72933 CA
Self-reported in NPPES; status is on the state search - Practice location
- 11633 Hawthorne Blvd, Hawthorne, CA 90250
- Phone
- (310) 792-4450
- Enumerated
- May 18, 2006
- Record last updated
- Mar 7, 2023
- Fax
- (310) 792-4455
- Medicaid ID
- 00G157110 CA
- Medicare enrollment
- Enrolled (PECOS I20051103001219); accepts Medicare assignment
- Medical or professional school
- University Of Missouri, Kansas City, School Of Medicine, 1994
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 11633 Hawthorne Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Hala Al-Shawe, DDSGeneral Practice Dentistry1134377856
- Ali Awada, MDPediatrics Physician1992722995
- Collins BenyeAddiction (Substance Use Disorder) Psychologist1447465976
- Duane Bridges, M.D.Clinical Cardiac Electrophysiology Physician1154352011
- Alfonso Brigham, M.D.Internal Medicine Physician1902858343
- Philip Cordova, PTPhysical Therapist1063598761
Verify Derek Frank Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A72933Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
25% more Medicare Part D claims than the average family medicine physician in 2024
4,427 Medicare Part D claims for 385 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 37 claims were for opioids.
Most prescribed
- Atorvastatin Calcium600 claims
- Amlodipine Besylate347 claims
- Losartan Potassium181 claims
- Metformin Hcl147 claims
- Lisinopril135 claims
- Metoprolol Succinate109 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Providence Medical InstituteLaguna Niguel, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Derek Frank Williams among 17,133 family medicine physician records in California
Derek Frank Williams, M.D. is one of 17,133 family medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 59% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1994 · median 2005 among the 10,652 with a school on file
- Record last updated2023 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
20 family medicine physician records list a practice address in Hawthorne
They are 20 of the 818 NPPES records with a practice address in Hawthorne, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Hawthorne → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Jennifer Chan, M.D.Hawthorne, CA 902501396756102
- Thomas Duralde, MDHawthorne, CA 902501982644043
- Michael Genova, M.D.Hawthorne, CA 902501376579227
- Khang Hoang, D.O.Hawthorne, CA 902501952397937
- Bernard Hunt, D.O.Hawthorne, CA 902501942256136
- Terry Ishihara, MDHawthorne, CA 902501609856939
- Karlon Johnson, M.D.Hawthorne, CA 902501144325473
- Khalid Khan, M.D.Hawthorne, CA 902501063440840
Common questions
What is Derek Frank Williams, M.D.'s NPI number?
Derek Frank Williams, M.D.'s National Provider Identifier (NPI) is 1467405753, issued on May 18, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Derek Frank Williams, M.D. located?
The NPPES record lists a practice address at 11633 Hawthorne Blvd, Hawthorne, CA, 90250. Phone: (310) 792-4450. Providers update this record themselves, so call before visiting.
How can I verify Derek Frank Williams, M.D.'s license?
NPPES lists California license number A72933, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Derek Frank Williams, M.D. prescribe under Medicare Part D?
In 2024, Derek Frank Williams, M.D. had 4,427 Medicare Part D claims for 385 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.