Daniel Simpson, M.D.
Radiation Oncology Physician · La Jolla, CA
Daniel Simpson, M.D. is a radiation oncology physician with a practice address in La Jolla, California, and NPI 1689974883, issued on Oct 22, 2010. Check the license (California A118377, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Daniel Simpson
- Credential
- M.D.
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License number
- A118377 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3855 Health Sciences Dr, La Jolla, CA 92093
- Phone
- (858) 822-6040
- Enumerated
- Oct 22, 2010
- Record last updated
- Feb 23, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (858) 822-6078
- Medicare enrollment
- Enrolled (PECOS I20150717002627); accepts Medicare assignment
- Medical or professional school
- University Of California, San Diego School Of Medicine, 2010
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 735 in California → Look up another NPI →
Also registered at 3855 Health Sciences Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Archana Ajmera, RN, MSN, APRN-BCNurse Practitioner1063792240
- Rabia Atayee, PHARM.D.Pharmacist1770655771
- Jill Attia, C.R.N.P.Nurse Practitioner1275598591
- Johana Austria, FNPFamily Nurse Practitioner1780963413
- Kasey Bamel, DNPFamily Nurse Practitioner1487106886
- Rafael Bejar, M.D., PH.D.Hematology & Oncology Physician1720051493
Verify Daniel Simpson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A118377Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% fewer Medicare Part D claims than the average radiation oncology physician in 2024
13 Medicare Part D claims, 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.
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: $136.26
1 payment: food and beverage; the largest payer was Jazz Pharmaceuticals Inc. The 3,275 providers of this specialty with any payment received $1,897.85 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.
Bills Medicare through 2 group practices
- California Cancer Associates For Research And Excellence IncSan Diego, CA
- Regents OF The University OF CaliforniaEncinitas, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Daniel Simpson among 735 radiation oncology physician records in California
Daniel Simpson, 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 2010, is newer than 66% of them.
- NPI issued2010 · 66% of these records are older, 31% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated2010 · median 2005 among the 545 with a school on file
- Record last updated2015 · 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 La Jolla → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Sunil Advani, M.D.La Jolla, CA 920931669649844
- Jona Hattangadi-Gluth, MDLa Jolla, CA 920931467625491
- Loren Mell, M.D.La Jolla, CA 920931316119704
- Kevin Murphy, M.D.La Jolla, CA 920931730104167
- James Murphy, MDLa Jolla, CA 920931730382631
- Brent Rose, M.D.La Jolla, CA 920931518250869
- Ajay Pal Sandhu, M.D.La Jolla, CA 920931881610137
- Stephen Seagren, M.D.La Jolla, CA 920931386692424
Common questions
What is Daniel Simpson, M.D.'s NPI number?
Daniel Simpson, M.D.'s National Provider Identifier (NPI) is 1689974883, issued on Oct 22, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Daniel Simpson, M.D. located?
The NPPES record lists a practice address at 3855 Health Sciences Dr, La Jolla, CA, 92093. Phone: (858) 822-6040. Providers update this record themselves, so call before visiting.
How can I verify Daniel Simpson, M.D.'s license?
NPPES lists California license number A118377, 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 Daniel Simpson, M.D. prescribe under Medicare Part D?
In 2024, Daniel Simpson, M.D. had 13 Medicare Part D claims; 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.