Dr. William Noel Marrero Leon , MD
General Practice β’ Manati, PR
Calle Hernandes Carrion Carr #2, Intercepcion 668 Urb Atenas
Manati, PR 006741142
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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Dr. William Marrero Leon is listed in NPPES under General Practice.
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NPI assigned on August 12, 2020; this date does not establish years in practice.
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Published CMS data list 786 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Losartan Potassium β 79 prescription fills, including refills.
- Gabapentin β 56 prescription fills, including refills.
- Synthroid (Levothyroxine Sodium) β 47 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 29 records in the table Β· Guide: How to read Medicare Part D prescriber data
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Close to the middle for Part D prescriptions among clinicians listed under General Practice in Manati, PR (2024, 62 clinicians with data). Median for this group: 742. Middle half: 137 to 5,268.
Close to the middle for Part D prescriptions among clinicians listed under General Practice in Puerto Rico (2024, 2,623 clinicians with data). Median for this group: 1,262. Middle half: 241 to 5,106.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part D prescriptions went from 77 in 2022 to 786 in 2024.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2022β2024.
Practice Location & Contact Primary Location
Calle Hernandes Carrion Carr #2
Intercepcion 668 Urb Atenas
Manati, PR 006741142
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
CMS Doctors and Clinicians lists 1 group name: Clinica Las Americas Guaynabo, Inc. See the list
Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026
2013
What Public CMS Data Show
General Practice: NPPES taxonomy is a reported classification, not proof of board certification.
30-day fills
1,462 standardized 30-day fills in 2024
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$55,172 in 2024
The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2024.
Open Payments general payments, program year 2025
All general payments: $490.53 across 13 records.
By nature of payment
- Food and Beverage: $490.53 across 13 records.
Reporting-company totals (3 largest of 5)
- Bristol Myers Squibb Company: $155.55 across 2 records.
- Adaptive Biotechnologies Corporation: $136.88 across 2 records.
- Pfizer Inc.: $76.27 across 1 record.
A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).
Years since graduation
13 years (graduated 2013)
CMS Doctors and Clinicians data list 2013 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026.
NPI first issued
2020
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Accepts Medicare assignment
CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians, CMS release of October 2, 2026; Medicare.gov, βDoes your provider accept Medicare as full payment?β
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians, CMS release of October 2, 2026.
Enrolled in Medicare (PECOS)
Dr. Marrero Leon has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Dr. Marrero Leon as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Manati and Puerto Rico
Billing and prescribing volume is not a quality rating.
Medicare Part D prescriptions
Close to the middle for clinicians listed under General Practice in Manati, PR (2024, 62 clinicians with data). Median for this group: 742. Middle half: 137 to 5,268.
Close to the middle for clinicians listed under General Practice in Puerto Rico (2024, 2,623 clinicians with data). Median for this group: 1,262. Middle half: 241 to 5,106.
Part D drug cost
A higher Part D drug cost than 60% of clinicians listed under General Practice in Manati, PR (2024, 62 clinicians with data). Median for this group: $12,511. Middle half: $1,183 to $180,944.
Close to the middle for clinicians listed under General Practice in Puerto Rico (2024, 2,623 clinicians with data). Median for this group: $34,550. Middle half: $2,978 to $214,501.
112 active clinicians are listed under General Practice with a practice address in Manati, PR (4,225 in Puerto Rico).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Manati
0% of these 112 clinicians have the CMS telehealth indicator.
19.6% of these 112 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 921% from 77 in 2022 to 786 in 2024.
- 2022: 77
- 2023: 80
- 2024: 786
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30-day fills
30-day fills increased 1799% from 77 in 2022 to 1,462 in 2024.
- 2022: 77
- 2023: 194
- 2024: 1,462
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Part D drug cost
Part D drug cost went from $582 in 2022 to $55,172 in 2024.
- 2022: $582
- 2023: $2,362
- 2024: $55,172
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $43.57 in 2021 to $490.53 in 2025.
- 2021: $43.57
- 2022: $178.96
- 2023: $206.45
- 2024: $249.48
- 2025: $490.53
Sources: CMS Medicare Part D Prescribers (2024), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS release of October 2, 2026, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo Β· Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2025 (payments made January 1 β December 31, 2025): 13 records totaling $490.53.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Bristol Myers Squibb Company |
Food and Beverage
Cash or cash equivalent
|
OPDIVO | General | $130.55 |
| Adaptive Biotechnologies Corporation |
Food and Beverage
Cash or cash equivalent
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clonoSEQ | General | $111.90 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
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PREVNAR 20 | General | $76.27 |
| Sanofi and Genzyme US Companies |
Food and Beverage
In-kind items and services
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SARCLISA | General | $48.11 |
| Bristol Myers Squibb Company |
Food and Beverage
Cash or cash equivalent
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OPDIVO | General | $25.00 |
| Adaptive Biotechnologies Corporation |
Food and Beverage
Cash or cash equivalent
|
clonoSEQ | General | $24.98 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
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XTANDI | General | $21.64 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
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XTANDI | General | $19.84 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
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PREVNAR 20 | General | $9.20 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
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PREVNAR 20 | General | $7.66 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
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PREVNAR 20 | General | $6.59 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
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PREVNAR 20 | General | $5.58 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
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PREVNAR 20 | General | $3.21 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Losartan Potassium | Losartan Potassium | 79 | 4,170 | $677.61 | 23 |
| Gabapentin | Gabapentin | 56 | 2,296 | $1,079.79 | 14 |
| Synthroid | Levothyroxine Sodium | 47 | 2,910 | $4,441.85 | 16 |
| Metoprolol Succinate | Metoprolol Succinate | 45 | 2,610 | $844.87 | 16 |
| Amlodipine Besylate | Amlodipine Besylate | 40 | 2,280 | $183.04 | 16 |
| Atorvastatin Calcium | Atorvastatin Calcium | 37 | 3,090 | $535.58 | 18 |
| Lantus | Insulin Glargine,hum.Rec.Anlog | 33 | 912 | $2,357.88 | β |
| Lisinopril | Lisinopril | 32 | 2,160 | $195.32 | β |
| Hydrochlorothiazide | Hydrochlorothiazide | 31 | 1,530 | $138.66 | β |
| Famotidine | Famotidine | 31 | 1,290 | $234.17 | 11 |
| Simvastatin | Simvastatin | 30 | 2,520 | $330.22 | 14 |
| Alendronate Sodium | Alendronate Sodium | 27 | 1,316 | $212.47 | β |
| Rosuvastatin Calcium | Rosuvastatin Calcium | 26 | 2,280 | $466.15 | 14 |
| Metformin Hcl | Metformin Hcl | 25 | 1,710 | $200.11 | β |
| Losartan-Hydrochlorothiazide | Losartan/Hydrochlorothiazide | 24 | 1,920 | $631.68 | β |
| Ibuprofen | Ibuprofen | 21 | 317 | $204.74 | 12 |
| Levothyroxine Sodium | Levothyroxine Sodium | 20 | 1,680 | $392.28 | β |
| Omeprazole | Omeprazole | 19 | 810 | $157.00 | β |
| Pantoprazole Sodium | Pantoprazole Sodium | 17 | 810 | $153.08 | β |
| Irbesartan | Irbesartan | 17 | 1,110 | $640.69 | β |
| Dexamethasone | Dexamethasone | 17 | 117 | $175.83 | 16 |
| Jardiance | Empagliflozin | 17 | 1,230 | $24,663.09 | β |
| Montelukast Sodium | Montelukast Sodium | 16 | 840 | $163.22 | β |
| Tamsulosin Hcl | Tamsulosin Hcl | 15 | 570 | $118.46 | β |
| Humalog | Insulin Lispro | 15 | 394 | $1,504.47 | β |
(top 25 shown)
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2021-09-08NUCC Taxonomy Code: 208D00000X
A physician who specializes in the general practice of diagnosing, treating, and managing patients with a variety of illnesses and conditions.
NUCC Taxonomy Code: 208D00000X
A physician who specializes in the general practice of diagnosing, treating, and managing patients with a variety of illnesses and conditions.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - GENERAL PRACTICE
I20211117001078
PR
1557750353
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Medicare Group Practice Enrollments
Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026
Clinica Las Americas Guaynabo, Inc
1 Carr, Carolina, PR 009837401
Phone: 7877891996
Clinica Las Americas Guaynabo, Inc
Carr 190, Carolina, PR 009837401
Phone: 7877891996
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
General Practice
Doctor of Medicine (M.D.)
General Practice
Doctor of Medicine (M.D.)
Radiology - Vascular & Interventional Radiology
Doctor of Medicine (M.D.)
General Practice
Doctor of Medicine (M.D.)
General Practice
Doctor of Medicine (M.D.)
General Practice
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Recorded as WILLIAM MARRERO LEON, MD
NPI status registered as active in NPPES database
Registered at CALLE HERNANDES CARRION CARR #2, INTERCEPCION 668 URB ATENAS, MANATI, PR 006741142 (Tel: 7876213700)
Registered at CALLE HERNANDES CARRION CARR #2, INTERCEPCION 668 URB ATENAS, MANATI, PR 006741142 (Tel: 7876213700)
Recorded as WILLIAM MARRERO, MD
General Practice (license number reported to NPPES: PR 15441)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other General Practices in Manati
- Dr. Rodolfo Caballero Quinones, MD
- Dr. Reynaldo Gomez Adrover, MD
- Dr. Shirley Lugardo, MD
- Dr. Sara Rivera, MD
- Dr. Carlos Rivera Rodriguez, MD
- Dr. Lorelis Hermina, MD
Mailing Address
Calle Hernandes Carrion Carr #2, Intercepcion 668 Urb Atenas
Manati, PR 006741142
Phone: 7876213700