NPI registry status
Active
2026 NPPES data Rheumatology Physician NPI 1932197639 MD
Verify on CMS → Roberto Leon-Perez, MD
Rheumatology Physician in Ponce, 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 6,181 in Rheumatology 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
6K
Medicare Part D claims · 868 beneficiaries · Rheumatology Physician avg: 2K
Generic prescribing
79%
generic claims · 21% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$737.14
29 payments · CMS Open Payments (Sunshine Act)
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
Roberto Leon-Perez, MD filed 6,076 Medicare Part D claims in 2023 as a Rheumatology Physician in Ponce, Puerto Rico, prescribing 79% generic.
- 6K
- Part D claims, 2023
- 79%
- generic prescribing
- $737.14
- industry payments (Sunshine Act)
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.
Roberto Leon-Perez, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
6,076 Top 5% higher than 95% 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)
Roberto Leon-Perez, 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 Roberto Leon-Perez, MD?
Quality data not reportedPrimary specialty
Rheumatology Physician
Medicare Part D claims
6,076 196% vs specialty avg
Specialty distribution in Puerto Rico
How Rheumatology 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 Rheumatology 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).
Roberto Leon-Perez, MD appears in the CMS NPPES registry as a Rheumatology Physician provider holding MD credentials at 2225 PONCE BY PASS PARRA BLDG, Ponce, PR, 00717, with a listed phone of (787) 843-1775. NPI 1932197639 was issued on 10/07/2005.
Medicare Part D records for calendar year 2023 show 6,076 prescription claims written by this provider, covering 868 Medicare beneficiaries and totaling roughly $7.1 million in drug spend, split 21% brand-name and 79% generic by claim count.
Rheumatology Physician is a mid-sized specialty nationwide, with 6,181 enrolled providers across 52 states and an average of 2,054 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 | 1932197639 |
|---|---|
| Specialty | Rheumatology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 10/07/2005 |
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 Roberto Leon-Perez, MD. Source: openpaymentsdata.cms.gov.
Total received
$737
Largest payer
AstraZeneca Pharmaceuticals LP
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
Roberto Leon-Perez, MD - brand share 21.0%
Rheumatology Physician average
21% brand-name claims vs 79% generic, on 6,076 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.
6,076
Total Claims
$7.1M
Total Drug Cost
868
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 6,662
- Total Day Supply
- 186,100
- Brand vs Generic
- 21% brand / 79% generic
- Brand Drug Cost
- $7.0M
- Generic Drug Cost
- $94K
Patient Demographics
- Average Patient Age
- 70.0 years
- Avg HCC Risk Score
- 1.90
- Gender Split
- 80% female / 20% male
- Age Distribution
- <65: 226, 65-74: 338, 75-84: 251, 85+: 53
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Roberto Leon-Perez, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Duloxetine Hcl
Duloxetine Hcl
1,084 claims
- Prednisone
Prednisone
739 claims
- Methotrexate
Methotrexate
463 claims
- Gabapentin 351
Gabapentin
351 claims
- Humira(Cf) Pen 324
Humira(Cf) Pen
324 claims
- Leflunomide 322
Leflunomide
322 claims
- Alendronate Sodium 241
Alendronate Sodium
241 claims
- Diclofenac Sodium 214
Diclofenac Sodium
214 claims
| Drug | Claims |
|---|---|
| Duloxetine Hcl | 1,084 |
| Prednisone | 739 |
| Methotrexate Methotrexate Sodium | 463 |
| Gabapentin | 351 |
| Humira(Cf) Pen Adalimumab | 324 |
| Leflunomide | 322 |
| Alendronate Sodium | 241 |
| Diclofenac Sodium | 214 |
| Hydroxychloroquine Sulfate | 189 |
| Baclofen | 113 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Rheumatology Physician Overview
How Roberto Leon-Perez, MD fits within the Rheumatology Physician landscape nationally.
6,181
Rheumatology Physician Providers in US
52
States with Rheumatology Physician
2,054
Avg Claims per Provider
Roberto Leon-Perez, MD's 6,076 claims are above the specialty average of 2,054.
Nearby Rheumatology Physician Providers in Puerto Rico
Other clinicians with the same primary specialty enrolled in Puerto Rico, drawn from the same CMS NPPES roster as Leon-Perez.
Dr. Paloma Alejandro
M.D.
San Juan, PR
Dr. Roberto Alvarez
M.D.
Aibonito, PR
Dr. Osvaldo Antommattei
MD
Ponce, PR
Dr. Oscar Arill
M.D.
San Juan, PR
Dr. Michael Babilonia Roman
M.D.
Mayaguez, PR
Compare Rheumatology 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 Rheumatology 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
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore Puerto Rico
Frequently Asked Questions
What is Roberto Leon-Perez, MD's specialty? ▼
Roberto Leon-Perez, MD specializes in Rheumatology Physician and practices in Ponce, Puerto Rico. Credentials: MD.
How much does Roberto Leon-Perez, MD prescribe under Medicare Part D? ▼
In 2023, Roberto Leon-Perez, MD wrote 6,076 Medicare Part D claims totaling $7.1M in drug costs for 868 beneficiaries.
Where is Roberto Leon-Perez, MD located? ▼
Roberto Leon-Perez, MD is located at 2225 PONCE BY PASS PARRA BLDG, Ponce, PR, 00717. Phone: (787) 843-1775.
What is Roberto Leon-Perez, MD's NPI number? ▼
Roberto Leon-Perez, MD's National Provider Identifier (NPI) is 1932197639, issued on 10/07/2005.
Does Roberto Leon-Perez, MD prescribe more brand-name or generic drugs? ▼
Roberto Leon-Perez, MD's prescribing is 21% brand-name and 79% generic drugs by claim count, with $7.0M in brand drug costs.
How many Rheumatology Physician providers are there in the US? ▼
There are 6,181 Rheumatology Physician providers across 52 states in the US. The average Rheumatology Physician provider writes 2,054 Medicare Part D claims per year.
What drugs does Roberto Leon-Perez, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Roberto Leon-Perez, MD's most frequently prescribed drugs include Duloxetine Hcl, Prednisone, Methotrexate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Roberto Leon-Perez, MD accept Medicare? ▼
Roberto Leon-Perez, MD appears in CMS Medicare data with 6,076 Part D claims and 868 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Roberto Leon-Perez, MD's credentials? ▼
Roberto Leon-Perez, MD's NPI is 1932197639 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.