NPI registry status
Active
2026 NPPES data General Practice Physician NPI 1063820355 MD
Verify on CMS → Guillermo Alvarez, MD
General Practice Physician in Moca, Puerto Rico.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 16,838 in General Practice Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
1K
Medicare Part D claims · 248 beneficiaries · General Practice Physician avg: 3K
Industry payments
$125
1 payments · CMS Open Payments (Sunshine Act)
What the federal data shows
Guillermo Alvarez, MD filed 1,352 Medicare Part D claims in 2024 as a General Practice Physician in Moca, Puerto Rico.
- 1K
- Part D claims, 2024
- $125
- industry payments (Sunshine Act)
- ≥79th
- pct by Part D claim volume (lower-bound band)
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Federal trust snapshot
What official records show about Guillermo Alvarez, MD
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1063820355), first enumerated 07/30/2014.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 1,352 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Practices in an ABMS-board-eligible specialty; board certification not confirmed in federal records.
- Reported
Industry payment transparency
$125 in reported industry payments (1 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1063820355 · General Practice Physician
NPI-10 · ENUM-MID · TAX-MID · RX-MID · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1063820355
- ENUM-MID 2014
- TAX-MID 17K General Practice
- RX-MID 1,352
- BOOK-LIGHT 3,970 in Puerto Rico
- PHOTO-ENUM George Hughes · 2014
Guillermo Alvarez, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
1,352 ≥ 79th percentile 79% of 1,416,883 prescribers are in lower value bands
Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2024
◑
Board-eligible specialty (heuristic, not verified)
Guillermo Alvarez, MD practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Guillermo Alvarez, MD?
Quality data not reportedPrimary specialty
General Practice Physician
Medicare Part D claims
1,352 54% vs specialty avg
Specialty distribution in Puerto Rico
How General Practice Physician compares to other specialties among Puerto Rico providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for General Practice Physician. Verify directly:
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Practice Address
Provider Details
| NPI | 1063820355 |
|---|---|
| Specialty | General Practice Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 07/30/2014 |
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Guillermo Alvarez, MD. Source: openpaymentsdata.cms.gov.
Total received
$125
Largest payer
Boehringer Ingelheim Pharmaceuticals, Inc.
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2024.
1,352
Total Claims
$67K
Total Drug Cost
248
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,415.367
- Total Day Supply
- 36,563
- Generic Drug Cost
- $13K
- Opioid Claims
- 15 (1.1% rate)
- Antibiotic Claims
- 118
Patient Demographics
- Average Patient Age
- 74.6 years
- Avg HCC Risk Score
- 2.63
- Gender Split
- 53% female / 47% male
- Age Distribution
- <65: 24, 65-74: 105, 75-84: 86, 85+: 33
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Guillermo Alvarez, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Atorvastatin Calcium
Atorvastatin Calcium
90 claims
- Losartan Potassium
Losartan Potassium
58 claims
- Metoprolol Succinate
Metoprolol Succinate
55 claims
- Lisinopril
Lisinopril
54 claims
- Famotidine
Famotidine
53 claims
- Gabapentin
Gabapentin
49 claims
- Amlodipine Besylate
Amlodipine Besylate
41 claims
- Synthroid
Synthroid
40 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 90 |
| Losartan Potassium | 58 |
| Metoprolol Succinate | 55 |
| Lisinopril | 54 |
| Famotidine | 53 |
| Gabapentin | 49 |
| Amlodipine Besylate | 41 |
| Synthroid Levothyroxine Sodium | 40 |
| Metformin Hcl | 33 |
| Amoxicillin-Clavulanate Potass Amoxicillin/Potassium Clav | 30 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
General Practice Physician Overview
How Guillermo Alvarez, MD fits within the General Practice Physician landscape nationally.
16,838
General Practice Physician Providers in US
56
States with General Practice Physician
2,957
Avg Claims per Provider
Guillermo Alvarez, MD's 1,352 claims are below the specialty average of 2,957.
Nationwide General Practice Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Alvarez, both outside Puerto Rico so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2014)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby General Practice Physician Providers in Puerto Rico
Other clinicians with the same primary specialty enrolled in Puerto Rico, drawn from the same CMS NPPES roster as Alvarez.
One of 3,970 General Practice Physician providers enrolled in Puerto Rico, 5 are shown here.
Dr. Veronica Abraham
MD
Bayamon, PR
Dr. Manuel Abraham Gonzalez
M.D.
San Juan, PR
Dr. Jennifer Abraham Vega
MD
San Juan, PR
Dr. Jose M. Abreu Guzman
M.D.
Manati, PR
Dr. Steven Abreu Reyes
M.D.
Las Piedras, PR
Compare General Practice Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Guillermo Alvarez, MD's specialty? ▼
Guillermo Alvarez, MD specializes in General Practice Physician and practices in Moca, Puerto Rico. Credentials: MD.
How much does Guillermo Alvarez, MD prescribe under Medicare Part D? ▼
In 2024, Guillermo Alvarez, MD wrote 1,352 Medicare Part D claims totaling $67K in drug costs for 248 beneficiaries.
Where is Guillermo Alvarez, MD located? ▼
Guillermo Alvarez, MD is located at MOCA MEDICAL PLAZA, Moca, PR, 00676. Phone: (787) 877-6103.
What is Guillermo Alvarez, MD's NPI number? ▼
Guillermo Alvarez, MD's National Provider Identifier (NPI) is 1063820355, issued on 07/30/2014.
Does Guillermo Alvarez, MD prescribe opioids? ▼
Yes, Guillermo Alvarez, MD had 15 opioid claims in 2024 with an opioid prescribing rate of 1.1%.
How many General Practice Physician providers are there in the US? ▼
There are 16,838 General Practice Physician providers across 56 states in the US. The average General Practice Physician provider writes 2,957 Medicare Part D claims per year.
What drugs does Guillermo Alvarez, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Guillermo Alvarez, MD's most frequently prescribed drugs include Atorvastatin Calcium, Losartan Potassium, Metoprolol Succinate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Guillermo Alvarez, MD accept Medicare? ▼
Guillermo Alvarez, MD appears in CMS Medicare data with 1,352 Part D claims and 248 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Guillermo Alvarez, MD's credentials? ▼
Guillermo Alvarez, MD's NPI is 1063820355 with credentials MD. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2024). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of August 2026 (NPPES) / 2024 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of August 2026.