Alexander Ramirez, MD
NPI 1538266424 · Hospitalist Physician · Oakland, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alexander Ramirez, MD is a Hospitalist Physician provider in Oakland, CA (NPI 1538266424).
Provider details
- NPI number
- 1538266424
- Entity type
- Individual
- Primary specialty
- Hospitalist PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A74102 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
890 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 587 | $132 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 148 | $130 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 101 | $88 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 43 | $193 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 11 | $145 |
Typical Medicare-allowed amounts for these services range $88–$193 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 10 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 25 | 23 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 23 | 22 |
| Pantoprazole Sodium | 19 | 14 |
| Furosemide | 16 | 16 |
| Amlodipine Besylate | 16 | 16 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 14 | 14 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-09-20
- Last updated
- 2021-03-22
- Certified
- 2021-03-22
Frequently asked questions
- What is Alexander Ramirez's NPI number?
- Alexander Ramirez's National Provider Identifier (NPI) is 1538266424, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alexander Ramirez's specialty?
- Alexander Ramirez is listed in the NPPES registry with a primary specialty of Hospitalist Physician (Allopathic & Osteopathic Physicians).
- Where is Alexander Ramirez located?
- Alexander Ramirez's practice location on file with NPPES is 400 34th St, Oakland, CA 94609-2816.
- What is Alexander Ramirez's phone number?
- The practice phone number listed in the NPPES registry for Alexander Ramirez is (510) 869-6883.
- Does Alexander Ramirez accept Medicare?
- Alexander Ramirez is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alexander Ramirez's NPI active?
- Yes — Alexander Ramirez's NPI (1538266424) is active in the NPPES registry as of the last update on 2021-03-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.