Mary Alexander, M.D.
Internal Medicine Physician · La Mesa, CA
Mary Alexander, M.D. is an internal medicine physician with a practice address in La Mesa, California, and NPI 1538177845, issued on Aug 3, 2006. Check the license (California G66922, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mary Alexander
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- G66922 CA
Self-reported in NPPES; status is on the state search - Practice location
- 5525 Grossmont Center Dr, La Mesa, CA 91942
- Phone
- (858) 499-2600
- Enumerated
- Aug 3, 2006
- Entity
- Type 1 · individual
Also registered at 5525 Grossmont Center Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ashkan Abedini, MDFamily Medicine Physician1013546373
- Cynthia Adams, PA-CMedical Physician Assistant1447564141
- Alicia Afrah-Boateng, PA-CPhysician Assistant1174073886
- Sonal Agrawal, M.D.Pediatrics Physician1881702348
- James Amberg, MDFamily Medicine Physician1265497093
- Marsha Blount, MDFamily Medicine Physician1710174693
Verify Mary Alexander in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G66922Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
2.7 times the Medicare Part D claims of the average internal medicine physician in 2024
7,621 Medicare Part D claims for 727 beneficiaries, against an average of 2,785 among the 127,794 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 404 claims were for opioids.
Most prescribed
- Losartan Potassium542 claims
- Atorvastatin Calcium468 claims
- Levothyroxine Sodium326 claims
- Amlodipine Besylate307 claims
- Lisinopril216 claims
- Hydrocodone-Acetaminophen209 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.
The practice group's Medicare quality score for 2023: 73.6 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
One hospital or facility affiliation
- Sharp Rees-Stealy Medical Group IncLa Mesa, CA
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
68 internal medicine physician records list a La Mesa practice address
They are 68 of the 2,168 NPPES records with a La Mesa practice address, and 20,403 internal medicine physician records in California.
All 68 in La Mesa → All 20,403 in California → Every provider in La Mesa →
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 Mary Alexander, M.D.'s NPI number?
Mary Alexander, M.D.'s National Provider Identifier (NPI) is 1538177845, issued on Aug 3, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mary Alexander, M.D. located?
The NPPES record lists a practice address at 5525 Grossmont Center Dr, La Mesa, CA, 91942. Phone: (858) 499-2600. Providers update this record themselves, so call before visiting.
How can I verify Mary Alexander, M.D.'s license?
NPPES lists California license number G66922, 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 Mary Alexander, M.D. prescribe under Medicare Part D?
In 2024, Mary Alexander, M.D. had 7,621 Medicare Part D claims for 727 beneficiaries; the average among internal medicine physician prescribers was 2,785. Part D covers Medicare prescriptions only.
What is Mary Alexander, M.D.'s Medicare quality score?
The 2023 MIPS final score is 73.6 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.