Dr. Nelson A. Matos-Fernandez, MD
- Medicare services, 2024
- 44
- Medicare patients, 2024
- 23
- Part D claims, 2024
- 1,975
- Industry payments
- $24,313
- Affiliated sites
- 1
- Practice address
- 14 Cll 2, Guaynabo, PR 00969
- Practice phone
- Call (787) 434-1700
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Mennonite General Hospital Inc
Guaynabo, Puerto Rico
Find Dr. Matos-Fernandez's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Nelson A. Matos-Fernandez is a hematologist and oncologist in Guaynabo, Puerto Rico
Dr. Matos-Fernandez practices at Mennonite General Hospital Inc in Guaynabo, Puerto Rico.
Dr. Matos-Fernandez's NPI, 1124214903, was assigned on September 14, 2007. Dr. Matos-Fernandez holds Puerto Rico license 16901.
- NPI
- 1124214903NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3375677719
- NPI enumeration date
- September 14, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (787) 434-1700
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 53
- Medical school graduation
- 1999
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Nelson A. Matos-Fernandez practices at Mennonite General Hospital Inc in Guaynabo, Puerto Rico
Dr. Matos-Fernandez's primary practice is Mennonite General Hospital Inc, at 14 Cll 2, Guaynabo, PR 00969 in Guaynabo County. The practice phone is (787) 434-1700.
- Mennonite General Hospital Inc14 Cll 2, Guaynabo, PR 00969 · Guaynabo CountyPhone(787) 434-1700
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Nelson A. Matos-Fernandez is affiliated with 2 sites of care
Dr. Matos-Fernandez's primary practice is Mennonite General Hospital Inc in Guaynabo, Puerto Rico. Dmand AI also links Dr. Matos-Fernandez to 1 physician office, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Nelson A. Matos-Fernandez's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Matos-Fernandez practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mennonite General Hospital Inc | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Nelson A. Matos-Fernandez is one of 114 hematologists and oncologists in Puerto Rico
Hematology and oncology is Dr. Matos-Fernandez's primary specialty in the NPI Registry, under taxonomy code 207RH0003X. Dr. Matos-Fernandez is licensed in Puerto Rico.
Specialties and state licenses
- Hematology and oncology, Puerto RicoPrimary
Hematologists and oncologists near Dr. Matos-Fernandez
Counts of hematologists and oncologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Nelson A. Matos-Fernandez billed Medicare for 44 services in 2024
CMS data shows 44 Medicare services from Dr. Matos-Fernandez across 1 procedure code in 2024, all of them office visits, for 23 Medicare patients. Medicare paid $2,743 for them. Every service was in an office.
Dr. Matos-Fernandez's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 412024: 447%
Dr. Matos-Fernandez compared with the Puerto Rico median for hematologists and oncologists, 2024
- Dr. Matos-Fernandez
- Puerto Rico median
- Medicare services
- 44vs 5824% below
- Medicare patients
- 23vs 2612% below
- Part D claims
- 1,747vs 88398% above
Medians across 105 hematologists and oncologists in Puerto Rico with Dmand AI profiles that report each measure.
Dr. Matos-Fernandez's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Nelson A. Matos-Fernandez treated 23 Medicare patients in 2024, average age 79
CMS counts 23 Medicare patients who saw Dr. Matos-Fernandez in 2024. The largest group is 75 to 84, with 12 patients. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 1.75, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Matos-Fernandez's median patient age at 67, with 50% women.
Dr. Matos-Fernandez's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Chronic conditions among Dr. Matos-Fernandez's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Diabetes65%
- Chronic kidney disease57%
- Cancer48%
Share of Medicare patients with each condition. A patient can have several.
Dr. Matos-Fernandez's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 67
Patient panel by sex, all payers
- Women50%
- Men50%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Nelson A. Matos-Fernandez wrote 1,975 Medicare Part D claims in 2024
In 2024, Dr. Matos-Fernandez wrote 1,975 Medicare Part D claims for 307 patients. 76% of them were for generic drugs. CMS names the drug for 1,747 of them, across 33 drugs with 11 or more claims each, at $4,116,506 in total drug cost. In 2023, CMS named 1,677 claims across 32 drugs.
Dr. Matos-Fernandez's Part D claims by kind of drug, 2024
- Generic1,502 claims76%
- Brand-name473 claims24%
Dr. Matos-Fernandez's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Matos-Fernandez's Part D claims, 2024
- Opioids2%45 of 1,975 claims
- Antibiotics1%18 of 1,975 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1,6772024: 1,7474%
Drugs named by CMS: 33 in 2024, 32 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Nelson A. Matos-Fernandez takes part in Medicare
Dr. Matos-Fernandez accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Nelson A. Matos-Fernandez received $24,313 in industry payments from 2016 to 2025
CMS Open Payments shows 1,030 general payments to Dr. Matos-Fernandez from 47 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 90% of the total. Bristol-Myers Squibb Company paid the most, $4,037.
General payments to Dr. Matos-Fernandez by program year, 2016 to 2025
General payments to Dr. Matos-Fernandez by kind, 2016 to 2025
- Food and beverage$21,80890%
- Speaker and faculty fees$1,5006%
- Education$1,0064%
Companies that paid Dr. Matos-Fernandez the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Nelson A. Matos-Fernandez's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Nelson A. Matos-Fernandez
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Nelson A. Matos-Fernandez's NPI number?
Dr. Nelson A. Matos-Fernandez's NPI number is 1124214903. It was assigned on September 14, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Nelson A. Matos-Fernandez?
Dr. Nelson A. Matos-Fernandez is a hematologist and oncologist in Guaynabo, Puerto Rico. The primary specialty in the NPI Registry is Hematology & Oncology Physician (taxonomy code 207RH0003X).
Where does Dr. Nelson A. Matos-Fernandez practice?
Dr. Matos-Fernandez practices at 14 Cll 2, Guaynabo, PR 00969. Dr. Matos-Fernandez's primary practice is Mennonite General Hospital Inc in Guaynabo, Puerto Rico. Dmand AI also links Dr. Matos-Fernandez to 1 physician office.
What is Dr. Nelson A. Matos-Fernandez's office phone number?
The practice phone on file for Dr. Matos-Fernandez is (787) 434-1700.
What is Dr. Nelson A. Matos-Fernandez's medical license number?
Dr. Matos-Fernandez holds Puerto Rico license 16901.
Does Dr. Nelson A. Matos-Fernandez accept Medicare?
Yes. CMS data shows Dr. Matos-Fernandez billed Medicare for 44 services in 2024, and Dr. Matos-Fernandez accepts Medicare assignment.
How many Medicare patients does Dr. Nelson A. Matos-Fernandez see?
CMS counts 23 Medicare patients who saw Dr. Matos-Fernandez in 2024, with an average age of 79.
What services does Dr. Nelson A. Matos-Fernandez bill to Medicare?
In 2024, Dr. Matos-Fernandez's most billed Medicare services were office visit, established patient (99213).
What drugs does Dr. Nelson A. Matos-Fernandez prescribe most?
In 2024 Medicare Part D data, Dr. Matos-Fernandez's most prescribed drugs by claims were Anastrozole, Bicalutamide and Letrozole.
Has Dr. Nelson A. Matos-Fernandez received payments from drug or device companies?
CMS Open Payments shows $24,313 in general payments to Dr. Matos-Fernandez from 47 companies from 2016 to 2025. The largest total came from Bristol-Myers Squibb Company.
How long has Dr. Nelson A. Matos-Fernandez been practicing?
Dr. Matos-Fernandez graduated from medical school in 1999, 27 years ago.
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