NPI registry status
Active
2026 NPPES data General Practice Physician NPI 1982745063 MD
Verify on CMS → Efrain Arroyo Pena, MD
General Practice Physician in Mayaguez, 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
4K
Medicare Part D claims · 218 beneficiaries · General Practice Physician avg: 3K
Generic prescribing
84%
generic claims · 15% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$115.35
5 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Efrain Arroyo Pena, MD filed 3,840 Medicare Part D claims in 2024 as a General Practice Physician in Mayaguez, Puerto Rico, prescribing 84% generic.
- 4K
- Part D claims, 2024
- 84%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥91st
- 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 Efrain Arroyo Pena, 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 1982745063), first enumerated 02/09/2007.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 3,840 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
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Reported
Industry payment transparency
$115.35 in reported industry payments (5 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 1982745063 · General Practice Physician
NPI-10 · ENUM-MID · TAX-MID · RX-MID · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1982745063
- ENUM-MID 2007
- TAX-MID 17K General Practice
- RX-MID 3,840
- BOOK-LIGHT 3,970 in Puerto Rico
- PHOTO-ENUM Orlando Leiva, M.D. · 2007
Efrain Arroyo Pena, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
3,840 ≥ 91st percentile 91% 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 certification likely (heuristic, not verified)
Efrain Arroyo Pena, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Efrain Arroyo Pena, MD?
Quality data not reportedPrimary specialty
General Practice Physician
Medicare Part D claims
3,840 30% 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 | 1982745063 |
|---|---|
| Specialty | General Practice Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 02/09/2007 |
Hospital and facility affiliations
Facilities where Efrain Arroyo Pena, MD bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
Migrant Health Center Western Region,inc
Mayaguez, PR
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
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 Efrain Arroyo Pena, MD. Source: openpaymentsdata.cms.gov.
Total received
$115
Largest payer
Gilead Sciences, 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.
Brand vs generic prescribing mix · Typical
Efrain Arroyo Pena, MD - brand share 15.0%
General Practice Physician average
15% brand-name claims vs 84% generic, on 3,840 2024 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2024.
3,840
Total Claims
$459K
Total Drug Cost
218
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 6,148.633
- Total Day Supply
- 180,198
- Brand vs Generic
- 15% brand / 84% generic
- Brand Drug Cost
- $418K
- Generic Drug Cost
- $40K
- Antibiotic Claims
- 18
Patient Demographics
- Average Patient Age
- 69.9 years
- Avg HCC Risk Score
- 1.39
- Gender Split
- 45% female / 55% male
- Age Distribution
- <65: 37, 65-74: 125, 75-84: 42, 85+: 14
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Efrain Arroyo Pena, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Gabapentin
Gabapentin
237 claims
- Atorvastatin Calcium
Atorvastatin Calcium
189 claims
- Losartan Potassium
Losartan Potassium
185 claims
- Lisinopril
Lisinopril
176 claims
- Metformin Hcl
Metformin Hcl
169 claims
- Famotidine
Famotidine
164 claims
- Amlodipine Besylate
Amlodipine Besylate
157 claims
- Glimepiride
Glimepiride
123 claims
| Drug | Claims |
|---|---|
| Gabapentin | 237 |
| Atorvastatin Calcium | 189 |
| Losartan Potassium | 185 |
| Lisinopril | 176 |
| Metformin Hcl | 169 |
| Famotidine | 164 |
| Amlodipine Besylate | 157 |
| Glimepiride | 123 |
| Synthroid Levothyroxine Sodium | 117 |
| Hydrochlorothiazide | 103 |
* 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 Efrain Arroyo Pena, 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
Efrain Arroyo Pena, MD's 3,840 claims are above the specialty average of 2,957.
Nationwide General Practice Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Arroyo Pena, both outside Puerto Rico so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2007)
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 Arroyo Pena.
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 Efrain Arroyo Pena, MD's specialty? ▼
Efrain Arroyo Pena, MD specializes in General Practice Physician and practices in Mayaguez, Puerto Rico. Credentials: MD.
How much does Efrain Arroyo Pena, MD prescribe under Medicare Part D? ▼
In 2024, Efrain Arroyo Pena, MD wrote 3,840 Medicare Part D claims totaling $459K in drug costs for 218 beneficiaries.
Where is Efrain Arroyo Pena, MD located? ▼
Efrain Arroyo Pena, MD is located at MIGRANT HEALTH CENTER, INC., Mayaguez, PR, 00680. Phone: (787) 805-2900.
What is Efrain Arroyo Pena, MD's NPI number? ▼
Efrain Arroyo Pena, MD's National Provider Identifier (NPI) is 1982745063, issued on 02/09/2007.
Does Efrain Arroyo Pena, MD prescribe more brand-name or generic drugs? ▼
Efrain Arroyo Pena, MD's prescribing is 15% brand-name and 84% generic drugs by claim count, with $418K in brand drug costs.
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 Efrain Arroyo Pena, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Efrain Arroyo Pena, MD's most frequently prescribed drugs include Gabapentin, Atorvastatin Calcium, Losartan Potassium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Efrain Arroyo Pena, MD accept Medicare? ▼
Efrain Arroyo Pena, MD appears in CMS Medicare data with 3,840 Part D claims and 218 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Efrain Arroyo Pena, MD's credentials? ▼
Efrain Arroyo Pena, MD's NPI is 1982745063 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.