Adam Robert Horn, M.D.
Radiation Oncology Physician · San Diego, CA
Adam Robert Horn, M.D. is a radiation oncology physician with a practice address in San Diego, California, and NPI 1982979019, issued on Mar 22, 2012. Check the license (California A126697, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Adam Robert Horn
- Credential
- M.D.
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License numbers
- A126697 CA
61499 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 200 W Arbor Dr, San Diego, CA 92103
- Phone
- (800) 926-8273
- Enumerated
- Mar 22, 2012
- Record last updated
- Dec 9, 2024
- Fax
- (888) 539-8781
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 735 in California → Look up another NPI →
Also registered at 200 W Arbor Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Geraldine Abcede, RNCertified Registered Nurse Anesthetist1982384046
- Joseph Abdelmalek, M.DNephrology Physician1740485531
- Kristy AbelCertified Registered Nurse Anesthetist1962113035
- Paula Abeleda, NPFamily Nurse Practitioner1558945022
Verify Adam Robert Horn in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A126697Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
71% fewer Medicare Part D claims than the average radiation oncology physician in 2024
39 Medicare Part D claims for 28 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Mometasone Furoate30 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.
Adam Robert Horn among 735 radiation oncology physician records in California
Adam Robert Horn, M.D. is one of 735 radiation oncology physician records with a practice address in California. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 71% of them.
- NPI issued2012 · 71% of these records are older, 24% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileNo · 74% of these records are
- Record last updated2024 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0001X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Radiation Oncology Physician providers in California
There are 735 radiation oncology physician records in California.
All 735 in California → Every provider in San Diego → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Donald Fuller, M.D.San Diego, CA 921031285632711
- Tahir Ijaz, M.D.San Diego, CA 921031225036742
- Anuradha Koka, M.D.San Diego, CA 921031538153549
- Jyoti Mayadev, M.DSan Diego, CA 921031902906902
- Arno Mundt, M.D.San Diego, CA 921031790708808
- Chika Nwachukwu, MDSan Diego, CA 921031194138263
- Parag Sanghvi, M.D., M..S.P.H.San Diego, CA 921031801005152
- Tyler Seibert, M.D., PH.D.San Diego, CA 921031679815963
Common questions
What is Adam Robert Horn, M.D.'s NPI number?
Adam Robert Horn, M.D.'s National Provider Identifier (NPI) is 1982979019, issued on Mar 22, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Adam Robert Horn, M.D. located?
The NPPES record lists a practice address at 200 W Arbor Dr, San Diego, CA, 92103. Phone: (800) 926-8273. Providers update this record themselves, so call before visiting.
How can I verify Adam Robert Horn, M.D.'s license?
NPPES lists California license number A126697, 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 Adam Robert Horn, M.D. prescribe under Medicare Part D?
In 2024, Adam Robert Horn, M.D. had 39 Medicare Part D claims for 28 beneficiaries; the average among radiation oncology physician prescribers was 134. 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.