Dr. William Doel Marrero-Leon, MD
- Part D claims, 2024
- 22
- Hospital affiliations
- 1
- Industry payments
- $9,797
- Medical group
- 1
- State license
- 1
- Practice address
- 1515 Holcombe Blvd, Houston, TX 77030
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Marrero-Leon's professional email, personal email and mobile number
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Dr. William Doel Marrero-Leon is a hematologist and oncologist in San Juan, Puerto Rico
Dr. Marrero-Leon practices at The University of Texas MD Anderson Cancer Center in Houston, Texas, part of The University of Texas System.
Dr. Marrero-Leon's NPI, 1336688274, was assigned on February 13, 2017. Dr. Marrero-Leon holds Puerto Rico license 22068.
- NPI
- 1336688274NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5294201075
- NPI enumeration date
- February 13, 2017
- NPI status
- Active
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. William Doel Marrero-Leon practices in Houston and San Juan
Dr. Marrero-Leon's primary practice is The University of Texas MD Anderson Cancer Center, at 1515 Holcombe Blvd, Houston, TX 77030. The NPI Registry lists Dr. Marrero-Leon's practice address as 10 Calle E Un, San Juan, PR 00915.
- The University of Texas MD Anderson Cancer CenterPrimary1515 Holcombe Blvd, Houston, TX 77030
- NPI Registry address10 Calle E Un, San Juan, PR 00915 · San Juan CountyPhone(787) 777-3535
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; Doctors and Clinicians National Downloadable File (CMS); and Dmand AI Practice Data
Dr. William Doel Marrero-Leon is affiliated with 1 site of care and 1 medical group
Dr. Marrero-Leon's primary practice is The University of Texas MD Anderson Cancer Center in Houston, Texas, part of The University of Texas System. The medical group on file is Physicians Referral Service.
Sources: Dmand AI Affiliation Data; Doctors and Clinicians National Downloadable File (CMS); and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. William Doel Marrero-Leon's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Marrero-Leon practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| The University of Texas MD Anderson Cancer Center | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. William Doel Marrero-Leon is one of 114 hematologists and oncologists in Puerto Rico
Hematology and oncology is Dr. Marrero-Leon's primary specialty in the NPI Registry, under taxonomy code 207RH0003X. Dr. Marrero-Leon is licensed in Puerto Rico.
Specialties and state licenses
- Hematology and oncology, Puerto RicoPrimary
Hematologists and oncologists near Dr. Marrero-Leon
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. William Doel Marrero-Leon wrote 22 Medicare Part D claims in 2024
In 2024, Dr. Marrero-Leon wrote 22 Medicare Part D claims for 11 patients. 95% of them were for generic drugs.
Dr. Marrero-Leon's Part D claims by kind of drug, 2024
- Generic21 claims95%
- Brand-name and other1 claims5%
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. William Doel Marrero-Leon received $9,797 in industry payments from 2017 to 2025
CMS Open Payments shows 268 general payments to Dr. Marrero-Leon from 42 drug and device companies from 2017 to 2025. Food and beverage make up the largest share, 94% of the total. Abbvie Inc. paid the most, $948.
General payments to Dr. Marrero-Leon by program year, 2017 to 2025
General payments to Dr. Marrero-Leon by kind, 2017 to 2025
- Food and beverage$9,16894%
- Education$5836%
- Gifts$460%
Companies that paid Dr. Marrero-Leon the most, 2017 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. William Doel Marrero-Leon'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 Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Dmand AI Org Hierarchy Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider (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. William Doel Marrero-Leon
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. William Doel Marrero-Leon's NPI number?
Dr. William Doel Marrero-Leon's NPI number is 1336688274. It was assigned on February 13, 2017, and it is active in the NPI Registry.
What kind of doctor is Dr. William Doel Marrero-Leon?
Dr. William Doel Marrero-Leon is a hematologist and oncologist in San Juan, Puerto Rico. The primary specialty in the NPI Registry is Hematology & Oncology Physician (taxonomy code 207RH0003X).
Where does Dr. William Doel Marrero-Leon practice?
Dr. Marrero-Leon practices at 1515 Holcombe Blvd, Houston, TX 77030. Dr. Marrero-Leon also practices at 10 Calle E Un, San Juan, PR 00915. Dr. Marrero-Leon's primary practice is The University of Texas MD Anderson Cancer Center in Houston, Texas, part of The University of Texas System.
What is Dr. William Doel Marrero-Leon's medical license number?
Dr. Marrero-Leon holds Puerto Rico license 22068.
Which hospitals is Dr. William Doel Marrero-Leon affiliated with?
Dr. Marrero-Leon practices at The University of Texas MD Anderson Cancer Center in Houston, Texas.
What medical group is Dr. William Doel Marrero-Leon part of?
Dr. Marrero-Leon is linked to Physicians Referral Service.
Has Dr. William Doel Marrero-Leon received payments from drug or device companies?
CMS Open Payments shows $9,797 in general payments to Dr. Marrero-Leon from 42 companies from 2017 to 2025. The largest total came from Abbvie Inc.
How long has Dr. William Doel Marrero-Leon been practicing?
Dr. Marrero-Leon's NPI was assigned in 2017.
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