Byron Williams, M.D.
Infectious Disease Physician · Glendale, CA
Byron Williams, M.D. is an infectious disease physician with a practice address in Glendale, California, and NPI 1295790319, issued on Apr 20, 2006. Check the license (California G76616, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Byron Williams
- Credential
- M.D.
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License number
- G76616 CA
Self-reported in NPPES; status is on the state search - Practice location
- 801 South Chevy Chase Drive #105, Glendale, CA 91205
- Phone
- (818) 242-5299
- Enumerated
- Apr 20, 2006
- Record last updated
- Jul 13, 2026
- Fax
- (818) 637-7607
- Medicare enrollment
- Enrolled (PECOS I20100923000114); accepts Medicare assignment
- Medical or professional school
- Howard University College Of Medicine, 1991
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest infectious disease physician records → All 1,119 in California → Look up another NPI →
Verify Byron Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G76616Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
19% fewer Medicare Part D claims than the average infectious disease physician in 2024
558 Medicare Part D claims for 78 beneficiaries, against an average of 689 among the 7,388 providers of this specialty who prescribed in Part D. Brand-name drugs were 36% of claims. 12 claims were for opioids.
Most prescribed
- Biktarvy56 claims
- Ertapenem49 claims
- Daptomycin42 claims
- Ceftriaxone23 claims
- Meropenem23 claims
- Fluconazole21 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 85 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $217.87
10 payments; by number, the most common kind was food and beverage; the largest payer was Gilead Sciences, Inc. The 3,895 providers of this specialty with any payment received $4,362.19 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.
Bills Medicare through 2 group practices
- Antaki And Associates Infectious Disease Medical Group IncGlendale, CA
- White Memorial Medical CenterLos Angeles, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Byron Williams among 1,119 infectious disease physician records in California
Byron Williams, M.D. is one of 1,119 infectious disease physician records with a practice address in California. 79% 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 4% of them.
- NPI issued2006 · 4% of these records are older, 54% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated1991 · median 2003 among the 735 with a school on file
- Record last updated2026 · 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 207RI0200X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Infectious Disease Physician providers in California
There are 1,119 infectious disease physician records in California.
All 1,119 in California → Every provider in Glendale → Infectious Disease Physician nationwide →
The 8 infectious disease physician records with the nearest ZIP codes
- Jean-Pierre Antaki, M.D.Glendale, CA 912051013972876
- Arash Alborzi, M.D.Glendale, CA 912061770582165
- Jessica Mantilla, MDGlendale, CA 912031891957973
- Paola Tempesti, MDGlendale, CA 912031093771578
- Wint Thu HunGlendale, CA 912081669738886
- Elisa Chang, M.D.Pasadena, CA 911061811284193
- David Delbello, M.D.Pasadena, CA 911061790988269
- Ryan Joo, M.D.Pasadena, CA 911061639301922
Common questions
What is Byron Williams, M.D.'s NPI number?
Byron Williams, M.D.'s National Provider Identifier (NPI) is 1295790319, issued on Apr 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Byron Williams, M.D. located?
The NPPES record lists a practice address at 801 South Chevy Chase Drive #105, Glendale, CA, 91205. Phone: (818) 242-5299. Providers update this record themselves, so call before visiting.
How can I verify Byron Williams, M.D.'s license?
NPPES lists California license number G76616, 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 Byron Williams, M.D. prescribe under Medicare Part D?
In 2024, Byron Williams, M.D. had 558 Medicare Part D claims for 78 beneficiaries; the average among infectious disease physician prescribers was 689. Part D covers Medicare prescriptions only.
What is Byron Williams, M.D.'s MIPS final score?
The 2023 MIPS final score is 85 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.