William Doel Marrero-Leon, M.D
Medical Oncology Physician · Houston, TX
William Doel Marrero-Leon, M.D is a medical oncology physician with a practice address in Houston, Texas, and NPI 1336688274, issued on Feb 13, 2017. Check the license (Texas V7258, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- William Doel Marrero-Leon
- Credential
- M.D
- Primary taxonomy
- Medical Oncology Physician 207RX0202X
- License number
- V7258 TX
Self-reported in NPPES; status is on the state search - Practice location
- 1515 Holcombe Blvd, Houston, TX 77030
- Phone
- (713) 792-6161
- Enumerated
- Feb 13, 2017
- Record last updated
- Apr 14, 2026
- Medicare enrollment
- Enrolled (PECOS I20260420000474); may accept Medicare assignment
- Entity
- Type 1 · individual
8 nearest medical oncology physician records → All 547 in Texas → Look up another NPI →
Also registered at 1515 Holcombe Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Hussein Abbas, MD, PHDInternal Medicine Physician1609220532
- James Abbruzzese, M.D.Medical Oncology Physician1134233224
- Karim Abdeldaem, MDEmergency Medicine Physician1558056200
Verify William Doel Marrero-Leon in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license V7258Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
97% fewer Medicare Part D claims than the average medical oncology physician in 2024
22 Medicare Part D claims for 11 beneficiaries, against an average of 703 among the 4,230 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $3,841.29
103 payments; by number, the most common kind was food and beverage; the largest payer was Sobi, Inc. The 3,343 providers of this specialty with any payment received $11,773.47 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
William Doel Marrero-Leon among 547 medical oncology physician records in Texas
William Doel Marrero-Leon, M.D is one of 547 medical oncology physician records with a practice address in Texas. 85% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2017, is newer than 94% of them.
- NPI issued2017 · 94% of these records are older, 5% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 76% of these records are
- Graduated2009 · median 2000 among the 414 with a school on file
- Record last updated2026 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RX0202X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Medical Oncology Physician providers in Texas
There are 547 medical oncology physician records in Texas.
All 547 in Texas → Every provider in Houston → Medical Oncology Physician nationwide →
The 8 medical oncology physician records with the nearest ZIP codes
- Matthew Ellis, MD PHDHouston, TX 770301669495685
- Daniel Epner, M.D.Houston, TX 770301083637151
- Jianjun Gao, M.D.Houston, TX 770301053356873
- Christopher Garrett, MDHouston, TX 770301861417115
- Maura Gillison, MDHouston, TX 770301760436927
- Anneliese Gonzalez, M.D.Houston, TX 770301245234889
- Kirk Heyne, MDHouston, TX 770301346227816
- Milind Javle, MDHouston, TX 770301831196252
Common questions
What is William Doel Marrero-Leon, M.D's NPI number?
William Doel Marrero-Leon, M.D's National Provider Identifier (NPI) is 1336688274, issued on Feb 13, 2017. An NPI identifies a provider in billing; it is not a license.
Where is William Doel Marrero-Leon, M.D located?
The NPPES record lists a practice address at 1515 Holcombe Blvd, Houston, TX, 77030. Phone: (713) 792-6161. Providers update this record themselves, so call before visiting.
How can I verify William Doel Marrero-Leon, M.D's license?
NPPES lists Texas license number V7258, as entered by the provider. Search the Texas Medical Board at https://profile.tmb.state.tx.us/Search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William Doel Marrero-Leon, M.D prescribe under Medicare Part D?
In 2024, William Doel Marrero-Leon, M.D had 22 Medicare Part D claims for 11 beneficiaries; the average among medical oncology physician prescribers was 703. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.