Guillermo Alonso, MD
NPI 1336120708 · Legal Medicine · Miami, FL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Guillermo Alonso, MD is a Legal Medicine provider in Miami, FL (NPI 1336120708).
Provider details
- NPI number
- 1336120708
- Entity type
- Individual
- Primary specialty
- Legal MedicineOther Service Providers
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- ME56063 (FL)
Specialties & taxonomies
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 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
2,623 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) |
|---|---|---|
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 979 | $112 |
| Subsequent Nursing Facility Care With Straightforward Level of Medical Decision Making, Per Day, If Using Time, 20 Minutes Or More99308 | 520 | $78 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 268 | $83 |
| Residence Visit for Established Patient With High Level of Medical Decision Making, Per Day, If Using Time, at Least 60 Minutes99350 | 182 | $194 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 141 | $125 |
| Residence Visit for Established Patient With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 40 Minutes |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 82 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 234 | 34 |
| Pantoprazole Sodium | 176 | 26 |
| Losartan Potassium | 157 | 22 |
| Amlodipine Besylate | 135 | 25 |
| Metoprolol Tartrate | 126 | 16 |
| Donepezil Hcl | 116 | 15 |
| Apixabanbrand: Eliquis |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$626 across 8 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)
- 12700 Sw 128th StMiami, FL 33186-5377Phone: (305) 278-7579
Registry dates
- Enumerated
- 2005-11-10
- Last updated
- 2026-01-07
- Certified
- 2026-01-07
Frequently asked questions
- What is Guillermo Alonso's NPI number?
- Guillermo Alonso's National Provider Identifier (NPI) is 1336120708, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Guillermo Alonso's specialty?
- Guillermo Alonso is listed in the NPPES registry with a primary specialty of Legal Medicine (Other Service Providers).
- Where is Guillermo Alonso located?
- Guillermo Alonso's practice location on file with NPPES is 8000 W Flagler St Ste 206, Miami, FL 33144-2153.
- What is Guillermo Alonso's phone number?
- The practice phone number listed in the NPPES registry for Guillermo Alonso is (786) 703-1620.
- Does Guillermo Alonso accept Medicare?
- Guillermo Alonso is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Guillermo Alonso's NPI active?
- Yes — Guillermo Alonso's NPI (1336120708) is active in the NPPES registry as of the last update on 2026-01-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.