NPI registry status
Active
2026 NPPES data Nuclear Imaging & Therapy Physician NPI 1376744615 M.D.
Verify on CMS → Ricardo Sein-Najera, M.D.
Nuclear Imaging & Therapy Physician in San Juan, 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 199 in Nuclear Imaging & Therapy 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
35
Medicare Part D claims · 13 beneficiaries · Nuclear Imaging & Therapy Physician avg: 992
Generic prescribing
57%
generic claims · 43% 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
Ricardo Sein-Najera, M.D. filed 35 Medicare Part D claims in 2023 as a Nuclear Imaging & Therapy Physician in San Juan, Puerto Rico, prescribing 57% generic.
- 35
- Part D claims, 2023
- 57%
- generic prescribing
- Likely
- board-certified (heuristic)
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.
Ricardo Sein-Najera, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
35 0th percentile higher than 0% 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 certification likely (heuristic, not verified)
Ricardo Sein-Najera, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 4 hospital affiliations - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Ricardo Sein-Najera, M.D.?
Quality data not reportedPrimary specialty
Nuclear Imaging & Therapy Physician
Medicare Part D claims
35 96% vs specialty avg
Specialty distribution in Puerto Rico
How Nuclear Imaging & Therapy 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 Nuclear Imaging & Therapy 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).
Ricardo Sein-Najera, M.D. appears in the CMS NPPES registry as a Nuclear Imaging & Therapy Physician provider holding M.D. credentials at SEIN MEDICAL PLAZA 126 DE DIEGO AVENUE, San Juan, PR, 00921, with a listed phone of (787) 758-0850. NPI 1376744615 was issued on 05/31/2007.
Medicare Part D records for calendar year 2023 show 35 prescription claims written by this provider, covering 13 Medicare beneficiaries and totaling roughly $1K in drug spend, split 43% brand-name and 57% generic by claim count.
Nuclear Imaging & Therapy Physician is a narrow specialty nationwide, with 199 enrolled providers across 35 states and an average of 992 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 | 1376744615 |
|---|---|
| Specialty | Nuclear Imaging & Therapy Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 05/31/2007 |
Hospital and facility affiliations
Facilities where Ricardo Sein-Najera, M.D. bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
According to CMS billing records, Ricardo Sein-Najera, M.D. is affiliated with 4 Medicare-billing facilities.
Centro DE Cancer DE LA Universidad
San Juan, PR
CT Radiology Complex LLC
Bayamon, PR
CT Radiology Complex LLC
Bayamon, PR
Monserrate Imaging Center Psc
Carolina, PR
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Brand vs generic prescribing mix · Above average
Ricardo Sein-Najera, M.D. - brand share 43.0%
Nuclear Imaging & Therapy Physician average
43% brand-name claims vs 57% generic, on 35 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.
35
Total Claims
$1K
Total Drug Cost
13
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 61
- Total Day Supply
- 1,713
- Brand vs Generic
- 43% brand / 57% generic
- Brand Drug Cost
- $810
- Generic Drug Cost
- $300
Patient Demographics
- Average Patient Age
- 69.0 years
- Avg HCC Risk Score
- 1.62
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
| Drug | Claims |
|---|---|
| Synthroid Levothyroxine Sodium | 15 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Nuclear Imaging & Therapy Physician in PR →
All providers in Puerto Rico →
Compare specialties →
Nuclear Imaging & Therapy Physician Overview
How Ricardo Sein-Najera, M.D. fits within the Nuclear Imaging & Therapy Physician landscape nationally.
199
Nuclear Imaging & Therapy Physician Providers in US
35
States with Nuclear Imaging & Therapy Physician
992
Avg Claims per Provider
Ricardo Sein-Najera, M.D.'s 35 claims are below the specialty average of 992.
Nearby Nuclear Imaging & Therapy Physician Providers in Puerto Rico
Other clinicians with the same primary specialty enrolled in Puerto Rico, drawn from the same CMS NPPES roster as Sein-Najera.
Dr. Rene Baez
M.D.
Ponce, PR
Dr. Cesar Borri Sola
M.D.
Bayamon, PR
Dr. Sandra Camacho-Otero
M.D.
San Juan, PR
Dr. Reinaldo Laguna -Figueroa
MD
Santurce, PR
Dr. Jose Rodriguez
MD,PSC
San Juan, PR
Compare Nuclear Imaging & Therapy 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 Nuclear Imaging & Therapy 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 Ricardo Sein-Najera, M.D.'s specialty? ▼
Ricardo Sein-Najera, M.D. specializes in Nuclear Imaging & Therapy Physician and practices in San Juan, Puerto Rico. Credentials: M.D..
How much does Ricardo Sein-Najera, M.D. prescribe under Medicare Part D? ▼
In 2023, Ricardo Sein-Najera, M.D. wrote 35 Medicare Part D claims totaling $1K in drug costs for 13 beneficiaries.
Where is Ricardo Sein-Najera, M.D. located? ▼
Ricardo Sein-Najera, M.D. is located at SEIN MEDICAL PLAZA 126 DE DIEGO AVENUE, San Juan, PR, 00921. Phone: (787) 758-0850.
What is Ricardo Sein-Najera, M.D.'s NPI number? ▼
Ricardo Sein-Najera, M.D.'s National Provider Identifier (NPI) is 1376744615, issued on 05/31/2007.
Does Ricardo Sein-Najera, M.D. prescribe more brand-name or generic drugs? ▼
Ricardo Sein-Najera, M.D.'s prescribing is 43% brand-name and 57% generic drugs by claim count, with $810 in brand drug costs.
How many Nuclear Imaging & Therapy Physician providers are there in the US? ▼
There are 199 Nuclear Imaging & Therapy Physician providers across 35 states in the US. The average Nuclear Imaging & Therapy Physician provider writes 992 Medicare Part D claims per year.
What drugs does Ricardo Sein-Najera, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Ricardo Sein-Najera, M.D.'s most frequently prescribed drugs include Synthroid. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Ricardo Sein-Najera, M.D. accept Medicare? ▼
Ricardo Sein-Najera, M.D. appears in CMS Medicare data with 35 Part D claims and 13 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Ricardo Sein-Najera, M.D.'s credentials? ▼
Ricardo Sein-Najera, M.D.'s NPI is 1376744615 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.