John Deryl Adderson, M.D.
Family Medicine Physician · San Diego, CA
John Deryl Adderson, M.D. is a family medicine physician with a practice address in San Diego, California, and NPI 1932149069, issued on Jun 7, 2006. Check the license (California A34404, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- John Deryl Adderson
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- A34404 CA
Self-reported in NPPES; status is on the state search - Practice location
- 6106 Regents RD, San Diego, CA 92122
- Phone
- (858) 625-2466
- Enumerated
- Jun 7, 2006
- Record last updated
- Nov 18, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (858) 625-2041
- Medicare enrollment
- Enrolled (PECOS I20081231000517); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 6106 Regents RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Robin Crabtree, C.F.N.P.Family Nurse Practitioner1053496679
Verify John Deryl Adderson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A34404Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
63% fewer Medicare Part D claims than the average family medicine physician in 2024
1,325 Medicare Part D claims for 166 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 31 claims were for opioids.
Most prescribed
- Losartan Potassium113 claims
- Levothyroxine Sodium80 claims
- Atorvastatin Calcium55 claims
- Lorazepam54 claims
- Hydrochlorothiazide48 claims
- Omeprazole48 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.
John Deryl Adderson among 17,133 family medicine physician records in California
John Deryl Adderson, M.D. is one of 17,133 family medicine physician records with a practice address in California. 81% 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 6% of them.
- NPI issued2006 · 6% of these records are older, 59% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1977 · median 2005 among the 10,652 with a school on file
- Record last updated2020 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
780 family medicine physician records list a practice address in San Diego
They are 780 of the 52,937 NPPES records with a practice address in San Diego, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in San Diego → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Natali Bittar, M.D.San Diego, CA 921221801097118
- Seth Camhi, MDSan Diego, CA 921221467770826
- Jennifer Campbell, M.D.San Diego, CA 921221124278072
- Jessica Cook, D.O.San Diego, CA 921221003069121
- Mark Cramer, M. D.San Diego, CA 921221396860144
- Robert Hickman, MDSan Diego, CA 921221952473779
- Katayoun Khorrami, MDSan Diego, CA 921221932539699
- Zohreh Saadabadi, M.DSan Diego, CA 921221013343045
Common questions
What is John Deryl Adderson, M.D.'s NPI number?
John Deryl Adderson, M.D.'s National Provider Identifier (NPI) is 1932149069, issued on Jun 7, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Deryl Adderson, M.D. located?
The NPPES record lists a practice address at 6106 Regents RD, San Diego, CA, 92122. Phone: (858) 625-2466. Providers update this record themselves, so call before visiting.
How can I verify John Deryl Adderson, M.D.'s license?
NPPES lists California license number A34404, 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 John Deryl Adderson, M.D. prescribe under Medicare Part D?
In 2024, John Deryl Adderson, M.D. had 1,325 Medicare Part D claims for 166 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.