Joseph Marquis, MD
Internal Medicine Physician · Oakland, CA
Joseph Marquis, MD is an internal medicine physician with a practice address in Oakland, California, and NPI 1598084329, issued on May 18, 2010. Check the license (California A127074, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Joseph Marquis
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A127074 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2950 International Blvd, Oakland, CA 94601
- Phone
- (510) 535-4400
- Enumerated
- May 18, 2010
- Record last updated
- Dec 17, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20140408001154); accepts Medicare assignment
- Medical or professional school
- Albany Medical College Of Union University, 2013
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 2950 International Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Paul Acosta, RDADental Assistant1932529658
- Karina Alcala BarbosaDentist1831608876
- Sandy AlegriaCase Manager/Care Coordinator1285220228
- Christopher Balkissoon, DNP, MSN, FNP-CFamily Nurse Practitioner1598159410
- Dipti Barot, M.D.General Practice Physician1689972184
- Jennifer BarreraFamily Nurse Practitioner1730876822
Verify Joseph Marquis in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A127074Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
29% fewer Medicare Part D claims than the average internal medicine physician in 2024
2,258 Medicare Part D claims for 576 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims. 135 claims were for opioids.
Most prescribed
- Atorvastatin Calcium151 claims
- Amlodipine Besylate75 claims
- Losartan Potassium75 claims
- Lisinopril70 claims
- Hydrocodone-Acetaminophen67 claims
- Levothyroxine Sodium62 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.
Bills Medicare through one group practice
- Permanente Medical Group IncRichmond, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Joseph Marquis among 17,696 internal medicine physician records in California
Joseph Marquis, MD is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 63% of them.
- NPI issued2010 · 63% of these records are older, 34% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2013 · median 2004 among the 11,065 with a school on file
- Record last updated2021 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
432 internal medicine physician records list a practice address in Oakland
They are 432 of the 18,558 NPPES records with a practice address in Oakland, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Oakland → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Zaina El-Isa, MDOakland, CA 946011861623555
- Claire Horton, MDOakland, CA 946011649374109
- Astha Kanani, M.D.Oakland, CA 946011770880163
- Bhrett Lash, MDOakland, CA 946011568489383
- Esteban Lovato, M.D.Oakland, CA 946011376610923
- John Murphy, M.D.Oakland, CA 946011437119591
- Bruce O'Neil, M.D.Oakland, CA 946011255399580
- Mark Robb, MDOakland, CA 946011053499665
Common questions
What is Joseph Marquis, MD's NPI number?
Joseph Marquis, MD's National Provider Identifier (NPI) is 1598084329, issued on May 18, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Joseph Marquis, MD located?
The NPPES record lists a practice address at 2950 International Blvd, Oakland, CA, 94601. Phone: (510) 535-4400. Providers update this record themselves, so call before visiting.
How can I verify Joseph Marquis, MD's license?
NPPES lists California license number A127074, 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 Joseph Marquis, MD prescribe under Medicare Part D?
In 2024, Joseph Marquis, MD had 2,258 Medicare Part D claims for 576 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.