Donald S. Clem, D.D.S.
Periodontics · Fullerton, CA
Donald S. Clem, D.D.S. is a periodontics with a practice address in Fullerton, California, and NPI 1770673287, issued on Oct 13, 2006. Check the license (California 29240, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Donald S. Clem
- Credential
- D.D.S.
- Primary taxonomy
- Periodontics 1223P0300X
- License number
- 29240 CA
Self-reported in NPPES; status is on the state search - Practice location
- 220 Laguna RD, Fullerton, CA 92835
- Phone
- (714) 441-0436
- Enumerated
- Oct 13, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (714) 441-0439
- Entity
- Type 1 · individual
8 nearest periodontics records → All 929 in California → Look up another NPI →
Also registered at 220 Laguna RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Donald Tormey, D.D.S.General Practice Dentistry1922027903
Verify Donald S. Clem in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 29240Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
91% more Medicare Part D claims than the average periodontics in 2024
528 Medicare Part D claims for 228 beneficiaries, against an average of 277 among the 4,191 providers of this specialty who prescribed in Part D. 12 claims were for opioids.
Most prescribed
- Amoxicillin198 claims
- Ibuprofen160 claims
- Azithromycin42 claims
- Diflunisal34 claims
- Doxycycline Hyclate18 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: $9,789.83
10 payments; by number, the most common kind was food and beverage; the largest payer was J. Morita USA, Inc. The 2,966 providers of this specialty with any payment received $1,338.41 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.
Donald S. Clem among 929 periodontics records in California
Donald S. Clem, D.D.S. is one of 929 periodontics records with a practice address in California. 69% 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, 71% newer
- In a Medicare fileYes · 69% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2007 · 78% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 1223P0300X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Periodontics providers in California
There are 929 periodontics records in California.
All 929 in California → Every provider in Fullerton → Periodontics nationwide →
The 8 periodontics records with the nearest ZIP codes
- John Choi, DDS, PHDFullerton, CA 928351720126337
- Ashley ChoiFullerton, CA 928351790673747
- Irwin Wedner, D.D.S.Fullerton, CA 928351699727610
- Nelson Yen, D.D.S., M.S.Fullerton, CA 928351245330091
- Eric Cho, DDSFullerton, CA 928331699804203
- Gene Park, D.D.S., M.S.Fullerton, CA 928331235304791
- Alan Young, D.M.D.Garden Grove, CA 928401124062260
- Ayman Balshe, DDS, MSAnaheim, CA 928061790839629
Common questions
What is Donald S. Clem, D.D.S.'s NPI number?
Donald S. Clem, D.D.S.'s National Provider Identifier (NPI) is 1770673287, issued on Oct 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Donald S. Clem, D.D.S. located?
The NPPES record lists a practice address at 220 Laguna RD, Fullerton, CA, 92835. Phone: (714) 441-0436. Providers update this record themselves, so call before visiting.
How can I verify Donald S. Clem, D.D.S.'s license?
NPPES lists California license number 29240, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Donald S. Clem, D.D.S. prescribe under Medicare Part D?
In 2024, Donald S. Clem, D.D.S. had 528 Medicare Part D claims for 228 beneficiaries; the average among periodontics prescribers was 277. 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.