Gregory Grant Williams, MD
Surgery Physician · Bakersfield, CA
Gregory Grant Williams, MD is a surgery physician with a practice address in Bakersfield, California, and NPI 1699795088, issued on Jul 20, 2006. Check the license (California G73172, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gregory Grant Williams
- Credential
- MD
- Primary taxonomy
- Surgery Physician 208600000X
- License number
- G73172 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1500 Haggin Oaks Blvd, Bakersfield, CA 93311
- Phone
- (661) 654-8346
- Enumerated
- Jul 20, 2006
- Record last updated
- Nov 12, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (661) 654-8337
- Entity
- Type 1 · individual
8 nearest surgery physician records → All 3,118 in California → Look up another NPI →
Verify Gregory Grant Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G73172Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
42% fewer Medicare Part D claims than the average surgery physician in 2024
85 Medicare Part D claims for 31 beneficiaries, against an average of 147 among the 20,115 providers of this specialty who prescribed in Part D.
Most prescribed
- Doxycycline Hyclate15 claims
- Levofloxacin11 claims
- Sulfamethoxazole-Trimethoprim11 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.
Industry payments in 2024: $389.54
19 payments; by number, the most common kind was food and beverage; the largest payer was Organogenesis Inc. The 17,103 providers of this specialty with any payment received $3,513.80 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Gregory Grant Williams among 3,118 surgery physician records in California
Gregory Grant Williams, MD is one of 3,118 surgery physician records with a practice address in California. 75% 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, 55% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 61% of these records are
- Record last updated2011 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208600000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Surgery Physician providers in California
There are 3,118 surgery physician records in California.
All 3,118 in California → Every provider in Bakersfield → Surgery Physician nationwide →
The 8 surgery physician records with the nearest ZIP codes
- George Brooks, MDBakersfield, CA 933111750626461
- Abraham Nisim, MDBakersfield, CA 933111639306392
- Gurmantpal Bhatti, M.D.Bakersfield, CA 933121174786347
- Nirav Naik, MDBakersfield, CA 933121437132321
- Debi Thomas, MDBakersfield, CA 933121245611995
- John Garcia, M.D.Bakersfield, CA 933091558344473
- Hormuz Irani, M.D.Bakersfield, CA 933091194708099
- Ravi Kapadia, MDBakersfield, CA 933091669736427
Common questions
What is Gregory Grant Williams, MD's NPI number?
Gregory Grant Williams, MD's National Provider Identifier (NPI) is 1699795088, issued on Jul 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Grant Williams, MD located?
The NPPES record lists a practice address at 1500 Haggin Oaks Blvd, Bakersfield, CA, 93311. Phone: (661) 654-8346. Providers update this record themselves, so call before visiting.
How can I verify Gregory Grant Williams, MD's license?
NPPES lists California license number G73172, 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 Gregory Grant Williams, MD prescribe under Medicare Part D?
In 2024, Gregory Grant Williams, MD had 85 Medicare Part D claims for 31 beneficiaries; the average among surgery physician prescribers was 147. 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.