NPI registry status
Active
2026 NPPES data Radiation Oncology Physician NPI 1255416301 MD
Verify on CMS → Winston Imbert De Iturrondo, MD
Radiation Oncology 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 6,018 in Radiation Oncology 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
518
Medicare Part D claims · 188 beneficiaries · Radiation Oncology Physician avg: 186
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Winston Imbert De Iturrondo, MD filed 518 Medicare Part D claims in 2023 as a Radiation Oncology Physician in San Juan, Puerto Rico.
- 518
- Part D claims, 2023
- 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.
Winston Imbert De Iturrondo, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
518 Top 34% higher than 66% 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)
Winston Imbert De Iturrondo, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation - 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 Winston Imbert De Iturrondo, MD?
Quality data not reportedPrimary specialty
Radiation Oncology Physician
Medicare Part D claims
518 178% vs specialty avg
Specialty distribution in Puerto Rico
How Radiation Oncology 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 Radiation Oncology 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).
Winston Imbert De Iturrondo, MD appears in the CMS NPPES registry as a Radiation Oncology Physician provider holding MD credentials at 400 AVE FD ROOSEVELT, San Juan, PR, 00918, with a listed phone of (787) 764-5666. NPI 1255416301 was issued on 10/26/2006.
Medicare Part D records for calendar year 2023 show 518 prescription claims written by this provider, covering 188 Medicare beneficiaries and totaling roughly $7K in drug spend.
Radiation Oncology Physician is a mid-sized specialty nationwide, with 6,018 enrolled providers across 52 states and an average of 186 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 | 1255416301 |
|---|---|
| Specialty | Radiation Oncology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 10/26/2006 |
Hospital and facility affiliations
Facilities where Winston Imbert De Iturrondo, MD 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.
Tome And Ubinas Radio Oncology Center
San Juan, 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).
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
518
Total Claims
$7K
Total Drug Cost
188
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 601
- Total Day Supply
- 14,001
- Generic Drug Cost
- $6K
- Antibiotic Claims
- 75
Patient Demographics
- Average Patient Age
- 72.6 years
- Avg HCC Risk Score
- 1.54
- Gender Split
- 8% female / 92% male
- Age Distribution
- <65: 13, 65-74: 102, 75-84: 62, 85+: 11
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Winston Imbert De Iturrondo, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Tamsulosin Hcl
Tamsulosin Hcl
277 claims
- Ciprofloxacin Hcl 52
Ciprofloxacin Hcl
52 claims
- Clonazepam 24
Clonazepam
24 claims
- Silodosin 19
Silodosin
19 claims
- Lidocaine-Prilocaine 17
Lidocaine-Prilocaine
17 claims
- Hydrocortisone 14
Hydrocortisone
14 claims
- Levofloxacin 13
Levofloxacin
13 claims
| Drug | Claims |
|---|---|
| Tamsulosin Hcl | 277 |
| Ciprofloxacin Hcl | 52 |
| Clonazepam | 24 |
| Silodosin | 19 |
| Lidocaine-Prilocaine Lidocaine/Prilocaine | 17 |
| Hydrocortisone | 14 |
| Levofloxacin | 13 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Radiation Oncology Physician Overview
How Winston Imbert De Iturrondo, MD fits within the Radiation Oncology Physician landscape nationally.
6,018
Radiation Oncology Physician Providers in US
52
States with Radiation Oncology Physician
186
Avg Claims per Provider
Winston Imbert De Iturrondo, MD's 518 claims are above the specialty average of 186.
Nearby Radiation Oncology Physician Providers in Puerto Rico
Other clinicians with the same primary specialty enrolled in Puerto Rico, drawn from the same CMS NPPES roster as Imbert De Iturrondo.
Gloria Arroyo-Bosch
Bayamon, PR
Dr. Alberto Cerra Franco
M.D.
Bayamon, PR
Dr. Carlos Chevere
M.D.
Rio Piedras, PR
Dr. Francisco Cordero-Gallardo
M.D
Bayamon, PR
Dr. Julio Diaz
M.D.
Rio Piedras, PR
Compare Radiation Oncology 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 Radiation Oncology 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
Learn more about finding, verifying, and understanding healthcare providers.
How to Find a Doctor
Step-by-step guide to choosing a provider
Verify Credentials
Check NPI, board certification & license status
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 Winston Imbert De Iturrondo, MD's specialty? ▼
Winston Imbert De Iturrondo, MD specializes in Radiation Oncology Physician and practices in San Juan, Puerto Rico. Credentials: MD.
How much does Winston Imbert De Iturrondo, MD prescribe under Medicare Part D? ▼
In 2023, Winston Imbert De Iturrondo, MD wrote 518 Medicare Part D claims totaling $7K in drug costs for 188 beneficiaries.
Where is Winston Imbert De Iturrondo, MD located? ▼
Winston Imbert De Iturrondo, MD is located at 400 AVE FD ROOSEVELT, San Juan, PR, 00918. Phone: (787) 764-5666.
What is Winston Imbert De Iturrondo, MD's NPI number? ▼
Winston Imbert De Iturrondo, MD's National Provider Identifier (NPI) is 1255416301, issued on 10/26/2006.
How many Radiation Oncology Physician providers are there in the US? ▼
There are 6,018 Radiation Oncology Physician providers across 52 states in the US. The average Radiation Oncology Physician provider writes 186 Medicare Part D claims per year.
What drugs does Winston Imbert De Iturrondo, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Winston Imbert De Iturrondo, MD's most frequently prescribed drugs include Tamsulosin Hcl, Ciprofloxacin Hcl, Clonazepam. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Winston Imbert De Iturrondo, MD accept Medicare? ▼
Winston Imbert De Iturrondo, MD appears in CMS Medicare data with 518 Part D claims and 188 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Winston Imbert De Iturrondo, MD's credentials? ▼
Winston Imbert De Iturrondo, MD's NPI is 1255416301 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.