Alberto Alonso, M.D.
NPI 1669621058 · Internal Medicine Physician · Huntington Park, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alberto Alonso, M.D. is a Internal Medicine Physician provider in Huntington Park, CA (NPI 1669621058).
Provider details
- NPI number
- 1669621058
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 102197 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
17 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
751 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 238 | $99 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 149 | $130 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 103 | $15 |
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 66 | $106 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 42 | $190 |
| 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 · 210 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 1,086 | 286 |
| Gabapentin | 703 | 181 |
| Metformin Hcl | 582 | 140 |
| Levothyroxine Sodium | 486 | 93 |
| Losartan Potassium | 420 | 113 |
| Amlodipine Besylate | 384 | 95 |
| Albuterol Sulfate |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,110 across 52 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
Registry dates
- Enumerated
- 2008-09-10
- Last updated
- 2015-07-01
Frequently asked questions
- What is Alberto Alonso's NPI number?
- Alberto Alonso's National Provider Identifier (NPI) is 1669621058, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alberto Alonso's specialty?
- Alberto Alonso is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Alberto Alonso located?
- Alberto Alonso's practice location on file with NPPES is 6611 Seville Ave, Huntington Park, CA 90255.
- What is Alberto Alonso's phone number?
- The practice phone number listed in the NPPES registry for Alberto Alonso is (562) 881-3043.
- Does Alberto Alonso accept Medicare?
- Alberto Alonso is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alberto Alonso's NPI active?
- Yes — Alberto Alonso's NPI (1669621058) is active in the NPPES registry as of the last update on 2015-07-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.