Donald John Horn, DMD
Endodontics · San Diego, CA
Donald John Horn, DMD is an endodontics with a practice address in San Diego, California, and NPI 1306988225, issued on Feb 14, 2007. Check the license (California DDS111685, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Donald John Horn
- Credential
- DMD
- Primary taxonomy
- Endodontics 1223E0200X
- License number
- DDS111685 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1455 G St, San Diego, CA 92101
- Phone
- (619) 324-4981
- Enumerated
- Feb 14, 2007
- Record last updated
- May 19, 2026
- Entity
- Type 1 · individual
Also registered at 1455 G St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Steven Fronczak, DMDGeneral Practice Dentistry1528638236
- Kevin Parekh, DMDDentist1235484791
- Arianna Segura, DDSDentist1134011075
Verify Donald John Horn in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license DDS111685Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.3 times the Medicare Part D claims of the average endodontics in 2024
399 Medicare Part D claims for 271 beneficiaries, against an average of 121 among the 4,119 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Methylprednisolone241 claims
- Penicillin V Potassium111 claims
- Clindamycin Hcl27 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.
Endodontics providers in California
There are 1,018 endodontics records in California.
Other endodontics records in California
- Farnoosh Abbasi, D.D.S, M.D.SMarina, CA1437423407
- Farah Abbassi, DMD, MSDSanta Ana, CA1528117165
- James Abbott, D.D.S., M.S.Santa Rosa, CA1467629386
- Adham Abdel Azim, BDS, DDSSan Francisco, CA1427300599
- Hamid AbediLong Beach, CA1891865861
- Sara AbolmaaliIrvine, CA1770937096
- Thomas Acierno, D.D.S.San Diego, CA1477641157
- Dina Adami, DDSSanta Monica, CA1962942367
- David Adamic, D.D.S.Hemet, CA1154570737
- Mona Adams, DDS, MS, MSDLa Mesa, CA1649463001
Common questions
What is Donald John Horn, DMD's NPI number?
Donald John Horn, DMD's National Provider Identifier (NPI) is 1306988225, issued on Feb 14, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Donald John Horn, DMD located?
The NPPES record lists a practice address at 1455 G St, San Diego, CA, 92101. Phone: (619) 324-4981. Providers update this record themselves, so call before visiting.
How can I verify Donald John Horn, DMD's license?
NPPES lists California license number DDS111685, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Donald John Horn, DMD prescribe under Medicare Part D?
In 2024, Donald John Horn, DMD had 399 Medicare Part D claims for 271 beneficiaries; the average among endodontics prescribers was 121. 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.