Arthur H. Williams, MD
Anatomic Pathology & Clinical Pathology Physician · San Gabriel, CA
Arthur H. Williams, MD is an anatomic pathology & clinical pathology physician with a practice address in San Gabriel, California, and NPI 1578524617, issued on Mar 29, 2006. Check the license (California G21327, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Arthur H. Williams
- Credential
- MD
- Primary taxonomy
- Anatomic Pathology & Clinical Pathology Physician 207ZP0102X
- License number
- G21327 CA
Self-reported in NPPES; status is on the state search - Practice location
- 438 W Las Tunas Dr, San Gabriel, CA 91776
- Phone
- (626) 570-6597
- Enumerated
- Mar 29, 2006
- Record last updated
- Nov 16, 2009 (not updated in 17 years: call before relying on the address or phone)
- Medicaid ID
- 00G213270 CA
- Medicare enrollment
- Enrolled (PECOS I20040723000545); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest anatomic pathology & clinical pathology physician records → All 1,554 in California → Look up another NPI →
Also registered at 438 W Las Tunas Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Armine Baltayan, MDAnatomic Pathology & Clinical Pathology Physician1558568428
- Julie Barron, M.S., P.A.-C.Medical Physician Assistant1366844318
- Xiangdong Bu, MDAnatomic Pathology & Clinical Pathology Physician1336108919
- Walter Bukata, M.D.Emergency Medicine Physician1174561492
- Jennifer Chan, PAPhysician Assistant1053840272
- He Chang, M.D.Anesthesiology Physician1962416164
Verify Arthur H. Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G21327Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
45% fewer Medicare Part D claims than the average anatomic pathology & clinical pathology physician in 2024
106 Medicare Part D claims, against an average of 192 among the 401 providers of this specialty who prescribed in Part D. Brand-name drugs were 26% of claims.
Most prescribed
- Celecoxib14 claims
- Ipratropium Bromide13 claims
- Praluent Pen12 claims
- Tamsulosin Hcl12 claims
- Levothyroxine Sodium11 claims
- Trazodone Hcl11 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
- San Gabriel Valley Consulting Pathologists Medical Group IncWest Covina, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Arthur H. Williams among 1,554 anatomic pathology & clinical pathology physician records in California
Arthur H. Williams, MD is one of 1,554 anatomic pathology & clinical pathology physician records with a practice address in California. 65% 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 7% of them.
- NPI issued2006 · 7% of these records are older, 57% newer
- In a Medicare fileYes · 65% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated1970 · median 2003 among the 891 with a school on file
- Record last updated2009 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207ZP0102X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
9 anatomic pathology & clinical pathology physician records list a practice address in San Gabriel
They are 9 of the 762 NPPES records with a practice address in San Gabriel, and 1,554 anatomic pathology & clinical pathology physician records in California.
All 1,554 in California → Every provider in San Gabriel → Anatomic Pathology & Clinical Pathology Physician nationwide →
The 8 anatomic pathology & clinical pathology physician records with the nearest ZIP codes
- Armine Baltayan, MDSan Gabriel, CA 917761558568428
- Xiangdong Bu, MDSan Gabriel, CA 917761336108919
- Hong Li, MDSan Gabriel, CA 917761982664892
- Shirley Tan, MDSan Gabriel, CA 917761407816325
- Muh-Yau Tang, MDSan Gabriel, CA 917761831159755
- Sunita Vempati, MDSan Gabriel, CA 917761710946363
- Mona Yong, MDSan Gabriel, CA 917761518927300
- Yibin Zhang, MDSan Gabriel, CA 917761861452658
Common questions
What is Arthur H. Williams, MD's NPI number?
Arthur H. Williams, MD's National Provider Identifier (NPI) is 1578524617, issued on Mar 29, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Arthur H. Williams, MD located?
The NPPES record lists a practice address at 438 W Las Tunas Dr, San Gabriel, CA, 91776. Phone: (626) 570-6597. Providers update this record themselves, so call before visiting.
How can I verify Arthur H. Williams, MD's license?
NPPES lists California license number G21327, 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 Arthur H. Williams, MD prescribe under Medicare Part D?
In 2024, Arthur H. Williams, MD had 106 Medicare Part D claims; the average among anatomic pathology & clinical pathology physician prescribers was 192. 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.