James Michael Amberg, MD
Family Medicine Physician · La Mesa, CA
James Michael Amberg, MD is a family medicine physician with a practice address in La Mesa, California, and NPI 1265497093, issued on Apr 17, 2006. Check the license (California G048686, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- James Michael Amberg
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- G048686 CA
Self-reported in NPPES; status is on the state search - Practice location
- 5525 Grossmont Center Dr, La Mesa, CA 91942
- Phone
- (619) 644-6500
- Enumerated
- Apr 17, 2006
- Record last updated
- Feb 28, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (619) 644-6539
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 5525 Grossmont Center Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify James Michael Amberg in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G048686Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average family medicine physician in 2024
131 Medicare Part D claims, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 22% of claims.
Most prescribed
- Levothyroxine Sodium39 claims
- Atomoxetine Hcl13 claims
- Dexlansoprazole Dr13 claims
- Estradiol13 claims
- Lubiprostone13 claims
- Medroxyprogesterone Acetate13 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.
James Michael Amberg among 17,133 family medicine physician records in California
James Michael Amberg, MD 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 fileNo · 62% of these records are
- Record last updated2014 · 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).
67 family medicine physician records list a practice address in La Mesa
They are 67 of the 2,168 NPPES records with a practice address in La Mesa, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in La Mesa → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Joseph Aiello, D.O.La Mesa, CA 919421104844380
- Adrianna Dangremond, MDLa Mesa, CA 919421508802828
- Frederick Jenkin, PHYSICIANLa Mesa, CA 919421225069123
- Bradham Kesling, M.D.La Mesa, CA 919421841224805
- Maria Lai, M.D.La Mesa, CA 919421588645048
- Robert Lajvardi, MDLa Mesa, CA 919421235187568
- Paula Leibham, NPLa Mesa, CA 919421114944899
- Joseph Leonard, M.D.La Mesa, CA 919421124086590
Common questions
What is James Michael Amberg, MD's NPI number?
James Michael Amberg, MD's National Provider Identifier (NPI) is 1265497093, issued on Apr 17, 2006. An NPI identifies a provider in billing; it is not a license.
Where is James Michael Amberg, MD located?
The NPPES record lists a practice address at 5525 Grossmont Center Dr, La Mesa, CA, 91942. Phone: (619) 644-6500. Providers update this record themselves, so call before visiting.
How can I verify James Michael Amberg, MD's license?
NPPES lists California license number G048686, 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 James Michael Amberg, MD prescribe under Medicare Part D?
In 2024, James Michael Amberg, MD had 131 Medicare Part D claims; 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.