Lewis Gamarra, M.D.
NPI 1124048608 · Hospitalist Physician · Emeryville, CA
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Lewis Gamarra, M.D. is a Hospitalist Physician provider in Emeryville, CA (NPI 1124048608).
Provider details
- NPI number
- 1124048608
- Entity type
- Individual
- Primary specialty
- Hospitalist PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- G70417 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
2,274 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 790 | $133 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 344 | $94 |
| Destruction of Precancer Skin Growth, 2-14 Growths17003 | 302 | $7 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 178 | $118 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 99 | $185 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent Visit |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 83 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 324 | 77 |
| Atorvastatin Calcium | 294 | 82 |
| Losartan Potassium | 234 | 57 |
| Hydrochlorothiazide | 220 | 48 |
| Metoprolol Succinate | 197 | 48 |
| Levothyroxine Sodium | 153 | 33 |
| Pantoprazole Sodium |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$86 across 3 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 2115 10th StSte A2Los Osos, CA 93402-3244Phone: (805) 534-9360Fax: (805) 534-9345
Registry dates
- Enumerated
- 2006-07-20
- Last updated
- 2023-01-11
- Certified
- 2023-01-11
Frequently asked questions
- What is Lewis Gamarra's NPI number?
- Lewis Gamarra's National Provider Identifier (NPI) is 1124048608, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Lewis Gamarra's specialty?
- Lewis Gamarra is listed in the NPPES registry with a primary specialty of Hospitalist Physician (Allopathic & Osteopathic Physicians).
- Where is Lewis Gamarra located?
- Lewis Gamarra's practice location on file with NPPES is 2100 Powell St Ste 400, Emeryville, CA 94608-1872.
- What is Lewis Gamarra's phone number?
- The practice phone number listed in the NPPES registry for Lewis Gamarra is (510) 851-7501.
- Does Lewis Gamarra accept Medicare?
- Lewis Gamarra is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Lewis Gamarra's NPI active?
- Yes — Lewis Gamarra's NPI (1124048608) is active in the NPPES registry as of the last update on 2023-01-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.