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 6,377 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 · 836 beneficiaries · Rheumatology Physician avg: 2K
Generic prescribing
78%
generic claims · 22% 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, 2024
What the federal data shows
Roberto Leon-Perez, MD filed 5,976 Medicare Part D claims in 2024 as a Rheumatology Physician in Ponce, Puerto Rico, prescribing 78% generic.
- 6K
- Part D claims, 2024
- 78%
- generic prescribing
- $737.14
- industry payments (Sunshine Act)
- ≥95th
- 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 Roberto Leon-Perez, 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 1932197639), first enumerated 10/07/2005.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 5,976 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
Practices in an ABMS-board-eligible specialty; board certification not confirmed in federal records.
- Reported
Industry payment transparency
$737.14 in reported industry payments (29 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 1932197639 · Rheumatology Physician
NPI-10 · ENUM-LEGACY · TAX-MID · RX-MID · BOOK-THIN · PHOTO-ENUM
- NPI-10 1932197639
- ENUM-LEGACY 2005
- TAX-MID 6K Rheumatology Physician
- RX-MID 5,976
- BOOK-THIN 66 in Puerto Rico
- PHOTO-ENUM Michael Stevens · 2005
Roberto Leon-Perez, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
5,976 ≥ 95th percentile 95% 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-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
5,976 190% 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).
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 22.0%
Rheumatology Physician average
22% brand-name claims vs 78% generic, on 5,976 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.
5,976
Total Claims
$7.0M
Total Drug Cost
836
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 6,700.3
- Total Day Supply
- 189,914
- Brand vs Generic
- 22% brand / 78% generic
- Brand Drug Cost
- $6.9M
- Generic Drug Cost
- $80K
Patient Demographics
- Average Patient Age
- 69.9 years
- Avg HCC Risk Score
- 1.86
- Gender Split
- 82% female / 18% male
- Age Distribution
- <65: 212, 65-74: 337, 75-84: 242, 85+: 45
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Roberto Leon-Perez, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Duloxetine Hcl
Duloxetine Hcl
1,119 claims
- Prednisone
Prednisone
719 claims
- Methotrexate
Methotrexate
453 claims
- Gabapentin 393
Gabapentin
393 claims
- Humira(Cf) Pen 320
Humira(Cf) Pen
320 claims
- Leflunomide 309
Leflunomide
309 claims
- Hydroxychloroquine… 224
Hydroxychloroquine Sulfate
224 claims
- Alendronate Sodium 216
Alendronate Sodium
216 claims
| Drug | Claims |
|---|---|
| Duloxetine Hcl | 1,119 |
| Prednisone | 719 |
| Methotrexate Methotrexate Sodium | 453 |
| Gabapentin | 393 |
| Humira(Cf) Pen Adalimumab | 320 |
| Leflunomide | 309 |
| Hydroxychloroquine Sulfate | 224 |
| Alendronate Sodium | 216 |
| Baclofen | 105 |
| Enbrel Sureclick Etanercept | 104 |
* 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.
6,377
Rheumatology Physician Providers in US
52
States with Rheumatology Physician
2,058
Avg Claims per Provider
Roberto Leon-Perez, MD's 5,976 claims are above the specialty average of 2,058.
Nationwide Rheumatology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Leon-Perez, both outside Puerto Rico so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2005)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
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.
One of 66 Rheumatology Physician providers enrolled in Puerto Rico, 5 are shown here.
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 →
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 2024, Roberto Leon-Perez, MD wrote 5,976 Medicare Part D claims totaling $7.0M in drug costs for 836 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 22% brand-name and 78% generic drugs by claim count, with $6.9M in brand drug costs.
How many Rheumatology Physician providers are there in the US? ▼
There are 6,377 Rheumatology Physician providers across 52 states in the US. The average Rheumatology Physician provider writes 2,058 Medicare Part D claims per year.
What drugs does Roberto Leon-Perez, MD prescribe most often? ▼
Based on 2024 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 5,976 Part D claims and 836 Medicare beneficiaries in 2024. 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 (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.