NPI registry status
Active
2026 NPPES data General Practice Physician NPI 1073606752 MD
Verify on CMS → Maria Perez Marrero, MD
General Practice Physician in Hormigueros, 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
1K
Medicare Part D claims · 82 beneficiaries · General Practice Physician avg: 3K
Generic prescribing
93%
generic claims · 6% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Maria Perez Marrero, MD filed 1,368 Medicare Part D claims in 2023 as a General Practice Physician in Hormigueros, Puerto Rico, prescribing 93% generic.
- 1K
- Part D claims, 2023
- 93%
- generic prescribing
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.
Maria Perez Marrero, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
1,368 Top 21% higher than 79% of 1,370,886 prescribers
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.
Source CMS Medicare Part D Prescriber Public Use File · 2023
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Board-eligible specialty (heuristic, not verified)
Maria Perez 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 Maria Perez Marrero, MD?
Quality data not reportedPrimary specialty
General Practice Physician
Medicare Part D claims
1,368 52% 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).
Maria Perez Marrero, MD appears in the CMS NPPES registry as a General Practice Physician provider holding MD credentials at CALLE MATEO FAJARDO 8, Hormigueros, PR, 00660, with a listed phone of (787) 849-6055. NPI 1073606752 was issued on 10/02/2006.
Medicare Part D records for calendar year 2023 show 1,368 prescription claims written by this provider, covering 82 Medicare beneficiaries and totaling roughly $47K in drug spend, split 6% brand-name and 93% generic by claim count.
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 | 1073606752 |
|---|---|
| Specialty | General Practice Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 10/02/2006 |
Brand vs generic prescribing mix · Generic-heavy
Maria Perez Marrero, MD - brand share 6.0%
General Practice Physician average
6% brand-name claims vs 93% generic, on 1,368 2023 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 2023.
1,368
Total Claims
$47K
Total Drug Cost
82
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 3,399
- Total Day Supply
- 99,246
- Brand vs Generic
- 6% brand / 93% generic
- Brand Drug Cost
- $24K
- Generic Drug Cost
- $22K
- Antibiotic Claims
- 31
Patient Demographics
- Average Patient Age
- 73.8 years
- Avg HCC Risk Score
- 1.15
- Gender Split
- 62% female / 38% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Maria Perez Marrero, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Simvastatin
Simvastatin
131 claims
- Lisinopril
Lisinopril
111 claims
- Metformin Hcl
Metformin Hcl
104 claims
- Losartan-Hydrochlo…
Losartan-Hydrochlorothiazide
89 claims
- Gabapentin
Gabapentin
78 claims
- Atorvastatin Calcium
Atorvastatin Calcium
77 claims
- Amlodipine Besylate
Amlodipine Besylate
62 claims
- Alendronate Sodium 48
Alendronate Sodium
48 claims
| Drug | Claims |
|---|---|
| Simvastatin | 131 |
| Lisinopril | 111 |
| Metformin Hcl | 104 |
| Losartan-Hydrochlorothiazide Losartan/Hydrochlorothiazide | 89 |
| Gabapentin | 78 |
| Atorvastatin Calcium | 77 |
| Amlodipine Besylate | 62 |
| Alendronate Sodium | 48 |
| Humulin 70-30 Insulin Nph Hum/Reg Insulin Hm | 48 |
| Omeprazole | 44 |
* 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 Maria Perez 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
Maria Perez Marrero, MD's 1,368 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 Perez 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.
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Frequently Asked Questions
What is Maria Perez Marrero, MD's specialty? ▼
Maria Perez Marrero, MD specializes in General Practice Physician and practices in Hormigueros, Puerto Rico. Credentials: MD.
How much does Maria Perez Marrero, MD prescribe under Medicare Part D? ▼
In 2023, Maria Perez Marrero, MD wrote 1,368 Medicare Part D claims totaling $47K in drug costs for 82 beneficiaries.
Where is Maria Perez Marrero, MD located? ▼
Maria Perez Marrero, MD is located at CALLE MATEO FAJARDO 8, Hormigueros, PR, 00660. Phone: (787) 849-6055.
What is Maria Perez Marrero, MD's NPI number? ▼
Maria Perez Marrero, MD's National Provider Identifier (NPI) is 1073606752, issued on 10/02/2006.
Does Maria Perez Marrero, MD prescribe more brand-name or generic drugs? ▼
Maria Perez Marrero, MD's prescribing is 6% brand-name and 93% generic drugs by claim count, with $24K in brand drug costs.
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 Maria Perez Marrero, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Maria Perez Marrero, MD's most frequently prescribed drugs include Simvastatin, Lisinopril, Metformin Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Maria Perez Marrero, MD accept Medicare? ▼
Maria Perez Marrero, MD appears in CMS Medicare data with 1,368 Part D claims and 82 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Maria Perez Marrero, MD's credentials? ▼
Maria Perez Marrero, MD's NPI is 1073606752 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.