Jennifer Diane Armstrong, MD
Internal Medicine Physician · Harbor City, CA
Jennifer Diane Armstrong, MD is an internal medicine physician with a practice address in Harbor City, California, and NPI 1578567178, issued on Jun 10, 2005. Check the license (California A74400, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Jennifer Diane Armstrong
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A74400 CA
Self-reported in NPPES; status is on the state search - Practice location
- 25825 Vermont Ave, Harbor City, CA 90710
- Phone
- (310) 257-6382
- Enumerated
- Jun 10, 2005
- Record last updated
- Dec 2, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20040301001252); accepts Medicare assignment
- Medical or professional school
- University Of Southern California Keck School Of Medicine, 1999
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 25825 Vermont Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Yossef Aelony, MDPulmonary Disease Physician1619178597
- Lisa Agustines, MDObstetrics & Gynecology Physician1750452736
Verify Jennifer Diane Armstrong in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A74400Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
82% more Medicare Part D claims than the average internal medicine physician in 2024
5,780 Medicare Part D claims for 1,750 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 248 claims were for opioids.
Most prescribed
- Atorvastatin Calcium533 claims
- Amlodipine Besylate409 claims
- Losartan Potassium258 claims
- Lisinopril216 claims
- Levothyroxine Sodium195 claims
- Rosuvastatin Calcium182 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: $23.89
1 payment: food and beverage; the largest payer was Pfizer Inc. The 50,334 providers of this specialty with any payment received $1,303.06 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 one group practice
- Southern California Permanente Medical GroupGardena, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
64 internal medicine physician records list a practice address in Harbor City
They are 64 of the 958 NPPES records with a practice address in Harbor City, and 17,696 internal medicine physician records in California.
All 64 in Harbor City → All 17,696 in California → Every provider in Harbor City →
Other internal medicine physician records in California
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- 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 Jennifer Diane Armstrong, MD's NPI number?
Jennifer Diane Armstrong, MD's National Provider Identifier (NPI) is 1578567178, issued on Jun 10, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Jennifer Diane Armstrong, MD located?
The NPPES record lists a practice address at 25825 Vermont Ave, Harbor City, CA, 90710. Phone: (310) 257-6382. Providers update this record themselves, so call before visiting.
How can I verify Jennifer Diane Armstrong, MD's license?
NPPES lists California license number A74400, 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 Jennifer Diane Armstrong, MD prescribe under Medicare Part D?
In 2024, Jennifer Diane Armstrong, MD had 5,780 Medicare Part D claims for 1,750 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.