Alexander John Ramirez, MD
Hospitalist Physician · Oakland, CA
Alexander John Ramirez, MD is a hospitalist physician with a practice address in Oakland, California, and NPI 1538266424, issued on Sep 20, 2006. Check the license (California A74102, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Alexander John Ramirez
- Credential
- MD
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- A74102 CA
Self-reported in NPPES; status is on the state search - Practice location
- 400 34TH St, Oakland, CA 94609
- Phone
- (510) 869-6883
- Enumerated
- Sep 20, 2006
- Record last updated
- Mar 22, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20040520000704); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 3,099 in California → Look up another NPI →
Also registered at 400 34TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Erwin KuoHospitalist Physician1437266269
- Felicia Sapp, M.D.Hospitalist Physician1629119102
- Carvel Tefft, M.D.Hospitalist Physician1598873200
Verify Alexander John Ramirez in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A74102Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
16% fewer Medicare Part D claims than the average hospitalist physician in 2024
438 Medicare Part D claims for 138 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D. 35 claims were for opioids.
Most prescribed
- Atorvastatin Calcium25 claims
- Hydrocodone-Acetaminophen23 claims
- Pantoprazole Sodium19 claims
- Amlodipine Besylate16 claims
- Furosemide16 claims
- Albuterol Sulfate Hfa14 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
- Sutter Bay Medical FoundationBerkeley, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Alexander John Ramirez among 3,099 hospitalist physician records in California
Alexander John Ramirez, MD is one of 3,099 hospitalist physician records with a practice address in California. 90% 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 2% of them.
- NPI issued2006 · 2% of these records are older, 73% newer
- In a Medicare fileYes · 90% of these records are
- In the CMS Doctors and Clinicians fileYes · 81% of these records are
- Graduated1999 · median 2010 among the 2,505 with a school on file
- Record last updated2021 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospitalist Physician providers in California
There are 3,099 hospitalist physician records in California.
All 3,099 in California → Every provider in Oakland → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Matthew Dahnke, M.D.Oakland, CA 946091487762092
- Joann Dominguez, MDOakland, CA 946091811003809
- James Felt, M.D.Oakland, CA 946091073621157
- Martin Garcia, M.D.Oakland, CA 946091619084423
- Leif Hass, M.D.Oakland, CA 946091528175346
- Erwin KuoOakland, CA 946091437266269
- Daniel Montes, M.D.Oakland, CA 946091487737755
- Lloyd Morrissey, M.D.Oakland, CA 946091801903562
Common questions
What is Alexander John Ramirez, MD's NPI number?
Alexander John Ramirez, MD's National Provider Identifier (NPI) is 1538266424, issued on Sep 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Alexander John Ramirez, MD located?
The NPPES record lists a practice address at 400 34TH St, Oakland, CA, 94609. Phone: (510) 869-6883. Providers update this record themselves, so call before visiting.
How can I verify Alexander John Ramirez, MD's license?
NPPES lists California license number A74102, 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 Alexander John Ramirez, MD prescribe under Medicare Part D?
In 2024, Alexander John Ramirez, MD had 438 Medicare Part D claims for 138 beneficiaries; the average among hospitalist physician prescribers was 521. 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.