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WILLIAM DOEL MARRERO-LEON M.D
NPI 1336688274
Internal Medicine - Medical Oncology in Houston, TX

Active since February 13, 2017PECOS Enrolled
1515 HOLCOMBE BLVD, HOUSTON, TX 77030(713) 792-6161 Get Directions Write a Review

NPPES record last updated: April 14, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Apr 14, 2026, Apr 10, 2026, Dec 18, 2024 and 4 more (7 updates tracked since 2017).

About William Doel Marrero-leon M.d NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

WILLIAM DOEL MARRERO-LEON M.D (NPI 1336688274) is an individual medical oncology provider in Houston, Texas, licensed in Texas (V7258) and active in the NPI registry since February 2017. He is enrolled in Medicare PECOS, maintains a secondary practice location in San Juan, and is a graduate of Other (2009).

NPPES Registry Identity

NPI1336688274
Entity TypeIndividualMale
Primary Taxonomy207RX0202X
Provider Legal NameWILLIAM DOEL MARRERO-LEONCredential: M.D
Location Address1515 HOLCOMBE BLVDHouston, TX 77030-4000
Mailing AddressPo Box 4439Houston, TX 77210-4439 · (713) 792-2991
Phone(713) 792-6161
Sole ProprietorNo
Medical School CMSOtherGraduated 2009
Enumeration DateFebruary 13, 2017
Last NPPES UpdateApril 14, 20267 updates tracked since enumeration
NPPES CertifiedApril 14, 2026
✔ NPI 1336688274 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyInternal Medicine · Medical OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RX0202X
License✔ Licensed in TX · V7258
Definition
An internist who specializes in the diagnosis and treatment of all types of cancer and other benign and malignant tumors. This specialist decides on and administers therapy for these malignancies as well as consults with surgeons and radiotherapists on other treatments for cancer.
Also ListedInternal MedicineTaxonomy 207R00000X · License V7258 (TX)
Also ListedInternal Medicine · HematologyTaxonomy 207RH0000X · License V7258 (TX)
1515 HOLCOMBE BLVD, Houston, TX 77030
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Secondary Practice Location 1

Location 1San JuanSan Juan, PR 00935-1609 · Phone (787) 777-3535

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

William Doel Marrero-leon M.d is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID5294201075
PECOS Enrollment IDI20260420000474
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 77030 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$176.98 typical visit price
range $58.24 – $176.98
Typical copayment $44.24 (range $14.56 – $44.24)
Most-billed visit code 99205
Established Patient
$102.71 typical visit price
range $18.60 – $143.93
Typical copayment $25.67 (range $4.65 – $35.98)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. MERRY CHEN MD
Psychiatry & Neurology (Neurology)
1515 HOLCOMBE BLVD
HOUSTON, TX 77030
Harris County (713) 792-6161
AMEENA BAGREE MALHOTRA M.D.
Internal Medicine (Nephrology)
1515 HOLCOMBE BLVD, 77030-4009
HOUSTON, TX 77030
Harris County (713) 792-6161
SOLANGE ERLYN COX MD
Surgery
1515 HOLCOMBE BLVD
HOUSTON, TX 77030
Harris County (713) 792-2360
DR. BRYAN KEITH GUILLORY M.D.
Pathology (Anatomic Pathology & Clinical Pathology)
1515 HOLCOMBE BLVD
HOUSTON, TX 77030
Harris County (713) 792-6161
JANUARY Y TSAI MD
Anesthesiology
1515 HOLCOMBE BLVD
HOUSTON, TX 77030
Harris County (713) 792-6161
DR. SUNYOUNG LEE MD
Internal Medicine (Medical Oncology)
1515 HOLCOMBE BLVD
HOUSTON, TX 77030
Harris County (713) 792-6161
MRS. RACHEL KRAMER FUTRELL PA-C
Physician Assistant
1515 HOLCOMBE BLVD
HOUSTON, TX 77030
Harris County (713) 792-6161
MEGAN J TANNER NP-C
Nurse Practitioner
1515 HOLCOMBE BLVD
HOUSTON, TX 77030
Harris County (713) 792-6161

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is William Marrero-leon's NPI number?

The NPI number for William Marrero-leon is 1336688274. It was assigned to this individual provider in the NPPES registry on February 13, 2017.

Where is William Marrero-leon located?

William Marrero-leon practices at 1515 Holcombe Blvd, Houston, TX 77030. The listed phone number is (713) 792-6161.

What is William Marrero-leon's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Medical Oncology, with taxonomy code 207RX0202X.

Is William Marrero-leon enrolled in Medicare?

Yes. William Marrero-leon is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for William Marrero-leon was last updated on April 14, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.