NPI registry status
Active
2026 NPPES data General Practice Physician NPI 1881195691 MD
Verify on CMS → Alexis Pereira-Marrero, MD
General Practice Physician in Caguas, 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 16,725 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
268
Medicare Part D claims · 198 beneficiaries · General Practice Physician avg: 3K
What the federal data shows
Alexis Pereira-Marrero, MD filed 268 Medicare Part D claims in 2023 as a General Practice Physician in Caguas, Puerto Rico.
- 268
- Part D claims, 2023
- ≥49th
- 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.
Alexis Pereira-Marrero, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
268 ≥ 49th percentile 49% of 1,370,886 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 · 2023
◑
Board-eligible specialty (heuristic, not verified)
Alexis Pereira-Marrero, 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 Alexis Pereira-Marrero, MD?
Quality data not reportedPrimary specialty
General Practice Physician
Medicare Part D claims
268 91% 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).
Alexis Pereira-Marrero, MD appears in the CMS NPPES registry as a General Practice Physician provider holding MD credentials at 6 ST K-1 BONNEVILLE GARDENS, Caguas, PR, 00725, with a listed phone of (787) 414-5701. NPI 1881195691 was issued on 02/27/2018.
Medicare Part D records for calendar year 2023 show 268 prescription claims written by this provider, covering 198 Medicare beneficiaries and totaling roughly $3K in drug spend.
General Practice Physician is a mid-sized specialty nationwide, with 16,725 enrolled providers across 56 states and an average of 2,872 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline.
Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.
Practice Address
Provider Details
| NPI | 1881195691 |
|---|---|
| Specialty | General Practice Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 02/27/2018 |
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
268
Total Claims
$3K
Total Drug Cost
198
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 275
- Total Day Supply
- 2,290
- Generic Drug Cost
- $3K
- Antibiotic Claims
- 84
Patient Demographics
- Average Patient Age
- 70.9 years
- Avg HCC Risk Score
- 1.75
- Gender Split
- 59% female / 41% male
- Age Distribution
- <65: 45, 65-74: 79, 75-84: 58, 85+: 16
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Alexis Pereira-Marrero, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Montelukast Sodium
Montelukast Sodium
42 claims
- Amoxicillin-Clavul…
Amoxicillin-Clavulanate Potass
26 claims
- Famotidine
Famotidine
20 claims
- Azithromycin
Azithromycin
17 claims
- Cephalexin
Cephalexin
17 claims
- Dexamethasone 12
Dexamethasone
12 claims
- Clindamycin Hcl 11
Clindamycin Hcl
11 claims
- Meloxicam 11
Meloxicam
11 claims
| Drug | Claims |
|---|---|
| Montelukast Sodium | 42 |
| Amoxicillin-Clavulanate Potass Amoxicillin/Potassium Clav | 26 |
| Famotidine | 20 |
| Azithromycin | 17 |
| Cephalexin | 17 |
| Dexamethasone | 12 |
| Clindamycin Hcl | 11 |
| Meloxicam | 11 |
* 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 Alexis Pereira-Marrero, MD fits within the General Practice Physician landscape nationally.
16,725
General Practice Physician Providers in US
56
States with General Practice Physician
2,872
Avg Claims per Provider
Alexis Pereira-Marrero, MD's 268 claims are below the specialty average of 2,872.
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 Pereira-Marrero.
Dr. Veronica Abraham
MD
San Juan, 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 →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Puerto Rico medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby General Practice Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
Healthcare Guides
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Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
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How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore Puerto Rico
Frequently Asked Questions
What is Alexis Pereira-Marrero, MD's specialty? ▼
Alexis Pereira-Marrero, MD specializes in General Practice Physician and practices in Caguas, Puerto Rico. Credentials: MD.
How much does Alexis Pereira-Marrero, MD prescribe under Medicare Part D? ▼
In 2023, Alexis Pereira-Marrero, MD wrote 268 Medicare Part D claims totaling $3K in drug costs for 198 beneficiaries.
Where is Alexis Pereira-Marrero, MD located? ▼
Alexis Pereira-Marrero, MD is located at 6 ST K-1 BONNEVILLE GARDENS, Caguas, PR, 00725. Phone: (787) 414-5701.
What is Alexis Pereira-Marrero, MD's NPI number? ▼
Alexis Pereira-Marrero, MD's National Provider Identifier (NPI) is 1881195691, issued on 02/27/2018.
How many General Practice Physician providers are there in the US? ▼
There are 16,725 General Practice Physician providers across 56 states in the US. The average General Practice Physician provider writes 2,872 Medicare Part D claims per year.
What drugs does Alexis Pereira-Marrero, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Alexis Pereira-Marrero, MD's most frequently prescribed drugs include Montelukast Sodium, Amoxicillin-Clavulanate Potass, Famotidine. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Alexis Pereira-Marrero, MD accept Medicare? ▼
Alexis Pereira-Marrero, MD appears in CMS Medicare data with 268 Part D claims and 198 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Alexis Pereira-Marrero, MD's credentials? ▼
Alexis Pereira-Marrero, MD's NPI is 1881195691 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 (2023). 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 April 2026 (NPPES) / 2023 (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 May 2026.