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Malignant Heme Alliance LLC

Hematology & Oncology Physician in Hato Rey, PR · enumerated 2026 · authorized official William Doel Marrero Leon, President.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1760301170

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Registry record

Entity type Organization (Type 2)
Legal business name Malignant Heme Alliance LLC
Practice address 715 Ave Ponce De Leon, Hato Rey, PR, 00917
Phone (787) 758-2000
Enumeration date Jul 11, 2026
Last updated in NPPES Jul 11, 2026

Taxonomy & classification

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name William Doel Marrero Leon
Title President
Phone (787) 247-2880

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

Where is Malignant Heme Alliance LLC located?
The practice location on file with NPPES is in Hato Rey, PR.
How current is this record?
Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2026-07-11. Verify at npiregistry.cms.hhs.gov.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-07-11.