Dr. William James Clark, DDS, MD
- Part D claims, 2024
- 543
- Industry payments
- $16
- Affiliated sites
- 1
- Medical group
- 1
- State license
- 1
- Practice address
- 1801 Solar Dr, Oxnard, CA 93030-8234
- Practice phone
- Call (805) 983-3131
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Cole And Clark Dental
Dental practice · Oxnard, California
Find Dr. Clark's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. William James Clark is an oral and maxillofacial surgery (dentist) in Simi Valley, California
Dr. Clark practices at Cole And Clark Dental in Oxnard, California.
Dr. Clark's NPI, 1487740007, was assigned on October 4, 2006. Dr. Clark holds California license 39247.
- NPI
- 1487740007NPI Registry (opens in a new tab)
- NPI enumeration date
- October 4, 2006
- NPI status
- Active
- Practice phone
- (805) 983-3131
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. William James Clark practices in Oxnard and Simi Valley
Dr. Clark's primary practice is Cole and Clark Dental, at 1801 Solar Dr, Oxnard, CA 93030-8234. The practice phone is (805) 983-3131. The NPI Registry lists Dr. Clark's practice address as 2975 N Sycamore Dr, Simi Valley, CA 93065.
- Cole and Clark DentalPrimary1801 Solar Dr, Oxnard, CA 93030-8234Phone(805) 983-3131
- NPI Registry address2975 N Sycamore Dr, Simi Valley, CA 93065 · Ventura County
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; Doctors and Clinicians National Downloadable File (CMS); and Dmand AI Practice Data
Dr. William James Clark is affiliated with 1 site of care and 1 medical group
Dr. Clark's primary practice is Cole And Clark Dental in Oxnard, California. Dmand AI also links Dr. Clark to 1 medical group, named with a free account.
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at Dr. William James Clark's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Clark practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Cole And Clark Dental | Available with a free account |
| +1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. William James Clark is one of 563 orals and maxillofacial surgery (dentist)s in California
Oral and maxillofacial surgery is Dr. Clark's primary specialty in the NPI Registry, under taxonomy code 1223S0112X. Dr. Clark is licensed in California.
Specialties and state licenses
- Oral and maxillofacial surgery (dentist), CaliforniaPrimary
Orals and maxillofacial surgery (dentist)s near Dr. Clark
Counts of orals and maxillofacial surgery (dentist)s with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. William James Clark's patients have a median age of 78
Across all payers, Dmand AI patient panel data puts Dr. Clark's median patient age at 78, with 47% women.
Dr. Clark's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 78
Patient panel by sex, all payers
- Women47%
- Men53%
Source: Dmand AI Patient Panel Data
Dr. William James Clark wrote 543 Medicare Part D claims in 2024
In 2024, Dr. Clark wrote 543 Medicare Part D claims for 258 patients. 100% of them were for generic drugs.
Dr. Clark's Part D claims by kind of drug, 2024
- Generic541 claims100%
- Brand-name and other2 claims0%
Drug classes CMS tracks in Dr. Clark's Part D claims, 2024
- Opioids49%268 of 543 claims
- Antibiotics44%239 of 543 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Dr. William James Clark received $16 in industry payments in 2025
CMS Open Payments shows 1 general payment to Dr. Clark from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. Align Technology, Inc. paid the most, $16.
Companies that paid Dr. Clark the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. William James Clark's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. William James Clark
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. William James Clark's NPI number?
Dr. William James Clark's NPI number is 1487740007. It was assigned on October 4, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. William James Clark?
Dr. William James Clark is an oral and maxillofacial surgery (dentist) in Simi Valley, California. The primary specialty in the NPI Registry is Oral and Maxillofacial Surgery (Dentist) (taxonomy code 1223S0112X).
Where does Dr. William James Clark practice?
Dr. Clark practices at 1801 Solar Dr, Oxnard, CA 93030-8234. Dr. Clark also practices at 2975 N Sycamore Dr, Simi Valley, CA 93065. Dr. Clark's primary practice is Cole And Clark Dental in Oxnard, California. Dmand AI also links Dr. Clark to 1 medical group.
What is Dr. William James Clark's office phone number?
The practice phone on file for Dr. Clark is (805) 983-3131.
What is Dr. William James Clark's medical license number?
Dr. Clark holds California license 39247.
Has Dr. William James Clark received payments from drug or device companies?
CMS Open Payments shows $16 in general payments to Dr. Clark from 1 company from 2025 to 2025. The largest total came from Align Technology, Inc.
How long has Dr. William James Clark been practicing?
Dr. Clark's NPI was assigned in 2006.
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