NPI registry status
Active
2026 NPPES data General Practice Physician NPI 1245280270 MD
Verify on CMS → Griselle Gerena Ramirez, MD
General Practice Physician in San Lorenzo, 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
18K
Medicare Part D claims · 319 beneficiaries · General Practice Physician avg: 3K
Generic prescribing
85%
generic claims · 13% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Griselle Gerena Ramirez, MD filed 18,030 Medicare Part D claims in 2023 as a General Practice Physician in San Lorenzo, Puerto Rico, prescribing 85% generic.
- 18K
- Part D claims, 2023
- 85%
- 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.
Griselle Gerena Ramirez, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
18,030 Top 2% higher than 98% 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
◑
Board-eligible specialty (heuristic, not verified)
Griselle Gerena Ramirez, 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 Griselle Gerena Ramirez, MD?
Quality data not reportedPrimary specialty
General Practice Physician
Medicare Part D claims
18,030 6× 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).
Griselle Gerena Ramirez, MD appears in the CMS NPPES registry as a General Practice Physician provider holding MD credentials at CALLE LUIS MUNOZ RIVERA 159, San Lorenzo, PR, 00754, with a listed phone of (787) 736-9660. NPI 1245280270 was issued on 05/11/2006.
Medicare Part D records for calendar year 2023 show 18,030 prescription claims written by this provider, covering 319 Medicare beneficiaries and totaling roughly $869K in drug spend, split 13% brand-name and 85% generic by claim count, with an opioid prescribing rate of 1.0%.
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 | 1245280270 |
|---|---|
| Specialty | General Practice Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 05/11/2006 |
Brand vs generic prescribing mix · Typical
Griselle Gerena Ramirez, MD - brand share 13.0%
General Practice Physician average
13% brand-name claims vs 85% generic, on 18,030 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.
18,030
Total Claims
$869K
Total Drug Cost
319
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 20,932
- Total Day Supply
- 606,377
- Brand vs Generic
- 13% brand / 85% generic
- Brand Drug Cost
- $652K
- Generic Drug Cost
- $210K
- Opioid Claims
- 184 (1.0% rate)
- Antibiotic Claims
- 210
Patient Demographics
- Average Patient Age
- 71.3 years
- Avg HCC Risk Score
- 2.09
- Gender Split
- 56% female / 44% male
- Age Distribution
- <65: 78, 65-74: 117, 75-84: 77, 85+: 47
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Griselle Gerena Ramirez, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Synthroid
Synthroid
819 claims
- Gabapentin
Gabapentin
778 claims
- Atorvastatin Calcium
Atorvastatin Calcium
768 claims
- Losartan Potassium
Losartan Potassium
614 claims
- Montelukast Sodium
Montelukast Sodium
585 claims
- Simvastatin
Simvastatin
564 claims
- Omeprazole
Omeprazole
507 claims
- Famotidine
Famotidine
498 claims
| Drug | Claims |
|---|---|
| Synthroid Levothyroxine Sodium | 819 |
| Gabapentin | 778 |
| Atorvastatin Calcium | 768 |
| Losartan Potassium | 614 |
| Montelukast Sodium | 585 |
| Simvastatin | 564 |
| Omeprazole | 507 |
| Famotidine | 498 |
| Metformin Hcl | 441 |
| Pantoprazole Sodium | 415 |
* 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 Griselle Gerena Ramirez, 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
Griselle Gerena Ramirez, MD's 18,030 claims are above 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 Gerena Ramirez.
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 Griselle Gerena Ramirez, MD's specialty? ▼
Griselle Gerena Ramirez, MD specializes in General Practice Physician and practices in San Lorenzo, Puerto Rico. Credentials: MD.
How much does Griselle Gerena Ramirez, MD prescribe under Medicare Part D? ▼
In 2023, Griselle Gerena Ramirez, MD wrote 18,030 Medicare Part D claims totaling $869K in drug costs for 319 beneficiaries.
Where is Griselle Gerena Ramirez, MD located? ▼
Griselle Gerena Ramirez, MD is located at CALLE LUIS MUNOZ RIVERA 159, San Lorenzo, PR, 00754. Phone: (787) 736-9660.
What is Griselle Gerena Ramirez, MD's NPI number? ▼
Griselle Gerena Ramirez, MD's National Provider Identifier (NPI) is 1245280270, issued on 05/11/2006.
Does Griselle Gerena Ramirez, MD prescribe more brand-name or generic drugs? ▼
Griselle Gerena Ramirez, MD's prescribing is 13% brand-name and 85% generic drugs by claim count, with $652K in brand drug costs.
Does Griselle Gerena Ramirez, MD prescribe opioids? ▼
Yes, Griselle Gerena Ramirez, MD had 184 opioid claims in 2023 with an opioid prescribing rate of 1.0%.
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 Griselle Gerena Ramirez, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Griselle Gerena Ramirez, MD's most frequently prescribed drugs include Synthroid, Gabapentin, Atorvastatin Calcium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Griselle Gerena Ramirez, MD accept Medicare? ▼
Griselle Gerena Ramirez, MD appears in CMS Medicare data with 18,030 Part D claims and 319 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Griselle Gerena Ramirez, MD's credentials? ▼
Griselle Gerena Ramirez, MD's NPI is 1245280270 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
Compiled from official public sources by the PlainDoctor editorial team.
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.