William James Clark, DDS, MD
Oral and Maxillofacial Surgery (Dentist) · Oxnard, CA
William James Clark, DDS, MD is an oral and maxillofacial surgery (dentist) with a practice address in Oxnard, California, and NPI 1487740007, issued on Oct 4, 2006. Check the license (California 39247, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- William James Clark
- Credential
- DDS, MD
- Primary taxonomy
- Oral and Maxillofacial Surgery (Dentist) 1223S0112X
- License number
- 39247 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1801 Solar Dr Ste 100, Oxnard, CA 93030
- Phone
- (805) 983-3131
- Enumerated
- Oct 4, 2006
- Record last updated
- Apr 14, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (805) 983-3000
- Entity
- Type 1 · individual
8 nearest oral and maxillofacial surgery (dentist) records → All 987 in California → Look up another NPI →
Also registered at 1801 Solar Dr Ste 100
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Neal Cole, DDSOral and Maxillofacial Surgery (Dentist)1740387752
Verify William James Clark in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 39247Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
34% more Medicare Part D claims than the average oral and maxillofacial surgery (dentist) in 2024
543 Medicare Part D claims for 258 beneficiaries, against an average of 406 among the 5,870 providers of this specialty who prescribed in Part D. 268 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen239 claims
- Amoxicillin198 claims
- Clindamycin Hcl33 claims
- Chlorhexidine Gluconate20 claims
- Oxycodone-Acetaminophen19 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: $30.99
1 payment: entertainment; the largest payer was Keystone Dental Inc. The 4,075 providers of this specialty with any payment received $1,077.58 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.
William James Clark among 987 oral and maxillofacial surgery (dentist) records in California
William James Clark, DDS, MD is one of 987 oral and maxillofacial surgery (dentist) 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 3% of them.
- NPI issued2006 · 3% of these records are older, 66% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 7% of these records are
- Record last updated2011 · 67% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 1223S0112X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Oral and Maxillofacial Surgery (Dentist) providers in California
There are 987 oral and maxillofacial surgery (dentist) records in California.
All 987 in California → Every provider in Oxnard → Oral and Maxillofacial Surgery (Dentist) nationwide →
The 8 oral and maxillofacial surgery (dentist) records with the nearest ZIP codes
- Neal Cole, DDSOxnard, CA 930301740387752
- Marwood Stout, DDSOxnard, CA 930301598708190
- Neal FreemanOjai, CA 930231356452304
- Brijesh Patel, M.D., D.D.SMoorpark, CA 930211497843403
- Reynaldo Rivera, MD, DDSCamarillo, CA 930101790902989
- Paul Bohman, DDSVentura, CA 930031336271170
- William Ferguson, D.D.S.Ventura, CA 930031588658413
- James Jacobs, DDS, MSVentura, CA 930031821207416
Common questions
What is William James Clark, DDS, MD's NPI number?
William James Clark, DDS, MD's National Provider Identifier (NPI) is 1487740007, issued on Oct 4, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William James Clark, DDS, MD located?
The NPPES record lists a practice address at 1801 Solar Dr Ste 100, Oxnard, CA, 93030. Phone: (805) 983-3131. Providers update this record themselves, so call before visiting.
How can I verify William James Clark, DDS, MD's license?
NPPES lists California license number 39247, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does William James Clark, DDS, MD prescribe under Medicare Part D?
In 2024, William James Clark, DDS, MD had 543 Medicare Part D claims for 258 beneficiaries; the average among oral and maxillofacial surgery (dentist) prescribers was 406. 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.