Amethyst Marie Aguero, DO
Internal Medicine Physician · El Cajon, CA
Amethyst Marie Aguero, DO is an internal medicine physician with a practice address in El Cajon, California, and NPI 1568021913, issued on Jun 10, 2019. Check the license (California 20A19473, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Amethyst Marie Aguero
- Credential
- DO
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 20A19473 CA
Self-reported in NPPES; status is on the state search - Practice location
- 525 E Main St, El Cajon, CA 92020
- Phone
- (619) 515-2498
- Enumerated
- Jun 10, 2019
- Record last updated
- Aug 1, 2022
- Entity
- Type 1 · individual
Also registered at 525 E Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Brittney Blais, NP-CFamily Nurse Practitioner1952852808
- Mai Duong, M.D.Internal Medicine Physician1629339304
- Tara Fleming, MDPediatrics Physician1972965242
- Magan Freitag, D.O.Family Medicine Physician1811378557
- Dixie Galapon, PH.D.Psychologist1174646301
Verify Amethyst Marie Aguero in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A19473Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
81% fewer Medicare Part D claims than the average internal medicine physician in 2024
615 Medicare Part D claims for 123 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium59 claims
- Gabapentin46 claims
- Amlodipine Besylate29 claims
- Sertraline Hcl29 claims
- Albuterol Sulfate Hfa23 claims
- Metformin Hcl20 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.
26 internal medicine physician records list a practice address in El Cajon
They are 26 of the 3,277 NPPES records with a practice address in El Cajon, and 17,696 internal medicine physician records in California.
All 26 in El Cajon → All 17,696 in California → Every provider in El Cajon →
Other internal medicine physician records in California
- Jacob Aaron, MDSan Francisco, CA1407202518
- Alistair Aaronson, MDStanford, CA1457628760
- Jose Abad., MDSacramento, CA1144607219
- Donna Abare, MDOakland, CA1386722155
- Marce AbareScotts Valley, CA1457744708
- Samuel Abarte, M.D.Chula Vista, CA1578535498
- Alexander Abary, MDLong Beach, CA1104995919
- Luba Abascal, MDSan Francisco, CA1023180874
- Michael Abate, MDSacramento, CA1548248131
- Wali Abawi, D.O.Joshua Tree, CA1104362268
Common questions
What is Amethyst Marie Aguero, DO's NPI number?
Amethyst Marie Aguero, DO's National Provider Identifier (NPI) is 1568021913, issued on Jun 10, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Amethyst Marie Aguero, DO located?
The NPPES record lists a practice address at 525 E Main St, El Cajon, CA, 92020. Phone: (619) 515-2498. Providers update this record themselves, so call before visiting.
How can I verify Amethyst Marie Aguero, DO's license?
NPPES lists California license number 20A19473, 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 Amethyst Marie Aguero, DO prescribe under Medicare Part D?
In 2024, Amethyst Marie Aguero, DO had 615 Medicare Part D claims for 123 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.