NPI registry status
Active
2026 NPPES data Ph.D. Medical Genetics NPI 1669542486 M.D.
Verify on CMS → Lucas Riossantoni, M.D.
Ph.D. Medical Genetics in Guanica, 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 357 in Ph.D. Medical Genetics, 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 · 78 beneficiaries · Ph.D. Medical Genetics avg: 984
Generic prescribing
94%
generic claims · 5% 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
Lucas Riossantoni, M.D. filed 1,391 Medicare Part D claims in 2023 as a Ph.D. Medical Genetics in Guanica, Puerto Rico, prescribing 94% generic.
- 1K
- Part D claims, 2023
- 94%
- 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.
Lucas Riossantoni, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
1,391 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
What does the federal data show about Lucas Riossantoni, M.D.?
Quality data not reportedPrimary specialty
Ph.D. Medical Genetics
Medicare Part D claims
1,391 41% vs specialty avg
Specialty distribution in Puerto Rico
How Ph.D. Medical Genetics 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 Ph.D. Medical Genetics. 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).
Lucas Riossantoni, M.D. appears in the CMS NPPES registry as a Ph.D. Medical Genetics provider holding M.D. credentials at 12 CALLE YAGUER, Guanica, PR, 00653, with a listed phone of (787) 821-2320. NPI 1669542486 was issued on 11/09/2006.
Medicare Part D records for calendar year 2023 show 1,391 prescription claims written by this provider, covering 78 Medicare beneficiaries and totaling roughly $35K in drug spend, split 5% brand-name and 94% generic by claim count, with an opioid prescribing rate of 4.3%.
Ph.D. Medical Genetics is a narrow specialty nationwide, with 357 enrolled providers across 46 states and an average of 984 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 | 1669542486 |
|---|---|
| Specialty | Ph.D. Medical Genetics |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 11/09/2006 |
Brand vs generic prescribing mix · Generic-heavy
Lucas Riossantoni, M.D. - brand share 5.0%
Ph.D. Medical Genetics average
5% brand-name claims vs 94% generic, on 1,391 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.
1,391
Total Claims
$35K
Total Drug Cost
78
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 2,181
- Total Day Supply
- 57,556
- Brand vs Generic
- 5% brand / 94% generic
- Brand Drug Cost
- $16K
- Generic Drug Cost
- $19K
- Opioid Claims
- 60 (4.3% rate)
- Antibiotic Claims
- 87
Patient Demographics
- Average Patient Age
- 72.6 years
- Avg HCC Risk Score
- 1.45
- Gender Split
- 51% female / 49% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
| Drug | Claims |
|---|---|
| NPPES-Taxonomy Acetaminophen-Codeine | N/A |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Ph.D. Medical Genetics Overview
How Lucas Riossantoni, M.D. fits within the Ph.D. Medical Genetics landscape nationally.
357
Ph.D. Medical Genetics Providers in US
46
States with Ph.D. Medical Genetics
984
Avg Claims per Provider
Lucas Riossantoni, M.D.'s 1,391 claims are above the specialty average of 984.
Nearby Ph.D. Medical Genetics Providers in Puerto Rico
Other clinicians with the same primary specialty enrolled in Puerto Rico, drawn from the same CMS NPPES roster as Riossantoni.
Dr. Carlos Blanco
M.D.
Manati, PR
Dr. Ariel Casiano Sanchez
MD
Guayanilla, PR
Dr. Jose Cintron
M.D.
Fajardo, PR
Nilka Cordero Rivera
Caguas, PR
Dr. Zelideh Cordova-Velazco
M.D.
Toa Alta, PR
Compare Ph.D. Medical Genetics 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 Ph.D. Medical Genetics 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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Frequently Asked Questions
What is Lucas Riossantoni, M.D.'s specialty? ▼
Lucas Riossantoni, M.D. specializes in Ph.D. Medical Genetics and practices in Guanica, Puerto Rico. Credentials: M.D..
How much does Lucas Riossantoni, M.D. prescribe under Medicare Part D? ▼
In 2023, Lucas Riossantoni, M.D. wrote 1,391 Medicare Part D claims totaling $35K in drug costs for 78 beneficiaries.
Where is Lucas Riossantoni, M.D. located? ▼
Lucas Riossantoni, M.D. is located at 12 CALLE YAGUER, Guanica, PR, 00653. Phone: (787) 821-2320.
What is Lucas Riossantoni, M.D.'s NPI number? ▼
Lucas Riossantoni, M.D.'s National Provider Identifier (NPI) is 1669542486, issued on 11/09/2006.
Does Lucas Riossantoni, M.D. prescribe more brand-name or generic drugs? ▼
Lucas Riossantoni, M.D.'s prescribing is 5% brand-name and 94% generic drugs by claim count, with $16K in brand drug costs.
Does Lucas Riossantoni, M.D. prescribe opioids? ▼
Yes, Lucas Riossantoni, M.D. had 60 opioid claims in 2023 with an opioid prescribing rate of 4.3%.
How many Ph.D. Medical Genetics providers are there in the US? ▼
There are 357 Ph.D. Medical Genetics providers across 46 states in the US. The average Ph.D. Medical Genetics provider writes 984 Medicare Part D claims per year.
What drugs does Lucas Riossantoni, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Lucas Riossantoni, M.D.'s most frequently prescribed drugs include NPPES-Taxonomy. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Lucas Riossantoni, M.D. accept Medicare? ▼
Lucas Riossantoni, M.D. appears in CMS Medicare data with 1,391 Part D claims and 78 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Lucas Riossantoni, M.D.'s credentials? ▼
Lucas Riossantoni, M.D.'s NPI is 1669542486 with credentials M.D.. 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.