NPI registry status
Active
2026 NPPES data Hematology & Oncology Physician NPI 1124214903 MD
Verify on CMS → Nelson Matos-Fernandez, MD
Hematology & Oncology Physician in Santa Isabel, 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 11,215 in Hematology & 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
2K
Medicare Part D claims · 276 beneficiaries · Hematology & Oncology Physician avg: 847
Generic prescribing
82%
generic claims · 18% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$2.9K
117 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
Nelson Matos-Fernandez, MD filed 1,884 Medicare Part D claims in 2023 as a Hematology & Oncology Physician in Santa Isabel, Puerto Rico, prescribing 82% generic.
- 2K
- Part D claims, 2023
- 82%
- generic prescribing
- $2.9K
- 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.
Nelson Matos-Fernandez, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
1,884 Top 17% higher than 83% 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)
Nelson Matos-Fernandez, 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 Nelson Matos-Fernandez, MD?
Quality data not reportedPrimary specialty
Hematology & Oncology Physician
Medicare Part D claims
1,884 122% vs specialty avg
Specialty distribution in Puerto Rico
How Hematology & 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 Hematology & 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).
Nelson Matos-Fernandez, MD appears in the CMS NPPES registry as a Hematology & Oncology Physician provider holding MD credentials at CARRETERA 153 KM 7.3 PLAZA SANTA ISABEL SUITE 15, Santa Isabel, PR, 00797, with a listed phone of (787) 845-0805. NPI 1124214903 was issued on 09/14/2007.
Medicare Part D records for calendar year 2023 show 1,884 prescription claims written by this provider, covering 276 Medicare beneficiaries and totaling roughly $3.4 million in drug spend, split 18% brand-name and 82% generic by claim count, with an opioid prescribing rate of 1.7%.
Hematology & Oncology Physician is a mid-sized specialty nationwide, with 11,215 enrolled providers across 54 states and an average of 847 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 | 1124214903 |
|---|---|
| Specialty | Hematology & Oncology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 09/14/2007 |
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 Nelson Matos-Fernandez, MD. Source: openpaymentsdata.cms.gov.
Total received
$2.9K
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
Nelson Matos-Fernandez, MD - brand share 18.0%
Hematology & Oncology Physician average
18% brand-name claims vs 82% generic, on 1,884 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.
1,884
Total Claims
$3.4M
Total Drug Cost
276
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 2,093
- Total Day Supply
- 57,542
- Brand vs Generic
- 18% brand / 82% generic
- Brand Drug Cost
- $3.1M
- Generic Drug Cost
- $260K
- Opioid Claims
- 32 (1.7% rate)
- Antibiotic Claims
- 28
Patient Demographics
- Average Patient Age
- 72.8 years
- Avg HCC Risk Score
- 2.67
- Gender Split
- 67% female / 33% male
- Age Distribution
- <65: 34, 65-74: 127, 75-84: 87, 85+: 28
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Nelson Matos-Fernandez, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Anastrozole
Anastrozole
704 claims
- Bicalutamide 101
Bicalutamide
101 claims
- Famotidine 97
Famotidine
97 claims
- Ondansetron Odt 71
Ondansetron Odt
71 claims
- Letrozole 66
Letrozole
66 claims
- Imatinib Mesylate 55
Imatinib Mesylate
55 claims
- Omeprazole 47
Omeprazole
47 claims
- Dexamethasone 46
Dexamethasone
46 claims
| Drug | Claims |
|---|---|
| Anastrozole | 704 |
| Bicalutamide | 101 |
| Famotidine | 97 |
| Ondansetron Odt Ondansetron | 71 |
| Letrozole | 66 |
| Imatinib Mesylate | 55 |
| Omeprazole | 47 |
| Dexamethasone | 46 |
| Sprycel Dasatinib | 46 |
| Prednisone | 45 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Hematology & Oncology Physician Overview
How Nelson Matos-Fernandez, MD fits within the Hematology & Oncology Physician landscape nationally.
11,215
Hematology & Oncology Physician Providers in US
54
States with Hematology & Oncology Physician
847
Avg Claims per Provider
Nelson Matos-Fernandez, MD's 1,884 claims are above the specialty average of 847.
Nearby Hematology & 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 Matos-Fernandez.
Dr. Jose Abreu Arbelo
MD
San Juan, PR
Dr. Luis Acaba
M.D.
San Juan, PR
Sifredo Acaron
Mayaguez, PR
Dr. Myrna Andino-Camacho
MD
Bayamon, PR
Dr. Antonio Aponte Gracia
M.D
Mayaguez, PR
Compare Hematology & 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 Hematology & 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.
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Medical Specialties Explained
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Understanding Medicare Claims Data
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How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore Puerto Rico
Frequently Asked Questions
What is Nelson Matos-Fernandez, MD's specialty? ▼
Nelson Matos-Fernandez, MD specializes in Hematology & Oncology Physician and practices in Santa Isabel, Puerto Rico. Credentials: MD.
How much does Nelson Matos-Fernandez, MD prescribe under Medicare Part D? ▼
In 2023, Nelson Matos-Fernandez, MD wrote 1,884 Medicare Part D claims totaling $3.4M in drug costs for 276 beneficiaries.
Where is Nelson Matos-Fernandez, MD located? ▼
Nelson Matos-Fernandez, MD is located at CARRETERA 153 KM 7.3 PLAZA SANTA ISABEL SUITE 15, Santa Isabel, PR, 00797. Phone: (787) 845-0805.
What is Nelson Matos-Fernandez, MD's NPI number? ▼
Nelson Matos-Fernandez, MD's National Provider Identifier (NPI) is 1124214903, issued on 09/14/2007.
Does Nelson Matos-Fernandez, MD prescribe more brand-name or generic drugs? ▼
Nelson Matos-Fernandez, MD's prescribing is 18% brand-name and 82% generic drugs by claim count, with $3.1M in brand drug costs.
Does Nelson Matos-Fernandez, MD prescribe opioids? ▼
Yes, Nelson Matos-Fernandez, MD had 32 opioid claims in 2023 with an opioid prescribing rate of 1.7%.
How many Hematology & Oncology Physician providers are there in the US? ▼
There are 11,215 Hematology & Oncology Physician providers across 54 states in the US. The average Hematology & Oncology Physician provider writes 847 Medicare Part D claims per year.
What drugs does Nelson Matos-Fernandez, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Nelson Matos-Fernandez, MD's most frequently prescribed drugs include Anastrozole, Bicalutamide, Famotidine. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Nelson Matos-Fernandez, MD accept Medicare? ▼
Nelson Matos-Fernandez, MD appears in CMS Medicare data with 1,884 Part D claims and 276 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Nelson Matos-Fernandez, MD's credentials? ▼
Nelson Matos-Fernandez, MD's NPI is 1124214903 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.