Alfonso Llosa Guerra
NPI 1881932234 · Internal Medicine Physician · Briarcliff Manor, NY
Enrolled with Medicare as Practitioner - Infectious Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alfonso Llosa Guerra is a Internal Medicine Physician provider in Briarcliff Manor, NY (NPI 1881932234).
Provider details
- NPI number
- 1881932234
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- No
- License
- 279038 (NY)
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
13 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
52 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 Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 34 | $86 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 18 | $135 |
Typical Medicare-allowed amounts for these services range $86–$135 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote 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 · 17 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Bictegrav/Emtricit/Tenofov Alabrand: Biktarvy | 37 |
| Rosuvastatin Calcium | 28 |
| Darunavir/Cobicistatbrand: Prezcobix | 27 |
| Atorvastatin Calcium | 24 |
| Hydrochlorothiazide | 21 |
| Lisinopril | 21 |
| Emtricitabine/Tenofov Alafenambrand: Descovy | 20 |
| Amlodipine Besylate | 19 |
| Dolutegravir Sodium |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$19 across 1 record (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
- 2013-01-18
- Last updated
- 2021-08-19
- Certified
- 2021-08-19
Frequently asked questions
- What is Alfonso Llosa Guerra's NPI number?
- Alfonso Llosa Guerra's National Provider Identifier (NPI) is 1881932234, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alfonso Llosa Guerra's specialty?
- Alfonso Llosa Guerra is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Alfonso Llosa Guerra located?
- Alfonso Llosa Guerra's practice location on file with NPPES is 302 Chappaqua Rd., Briarcliff Manor, NY 10510-1354.
- What is Alfonso Llosa Guerra's phone number?
- The practice phone number listed in the NPPES registry for Alfonso Llosa Guerra is (914) 762-2276.
- Does Alfonso Llosa Guerra accept Medicare?
- Alfonso Llosa Guerra is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alfonso Llosa Guerra's NPI active?
- Yes — Alfonso Llosa Guerra's NPI (1881932234) is active in the NPPES registry as of the last update on 2021-08-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.