Dr. Laszlo Leb , MD
Internal Medicine - Hematology • Worcester, MA
Notice of NPI Deactivation & Inactive Practice Status
According to official public domain records published by CMS (Centers for Medicare & Medicaid Services) in the National Provider Identifier (NPPES) Registry, Dr. Laszlo Leb has officially deactivated this NPI record and ceased active healthcare practice.
Professional Overview & Biography Verified Profile Summary
Dr. Laszlo Leb, MD was a registered Internal Medicine - Hematology practicing in Worcester, MA. Throughout an active medical career spanning 21 years, Dr. Leb provided care at the practice location at 20 WORCESTER CENTER BLVD until profile deactivation on 2026-06-18.
Practice Location & Contact Primary Location
20 Worcester Center Blvd
Worcester, MA 016081312
Specialty Benchmarks & Practice Insights
Comparative analytics for Internal Medicine - Hematology in Worcester, MA
Practicing in Worcester, MA (122 Statewide)
In-Person Office Visits Only
Under CMS Medicare Fee Schedule vs Standard Submitted Charges
Medical Specialties & State Licenses
NUCC Taxonomy Code: 207RH0000X
An internist with additional training who specializes in diseases of the blood, spleen and lymph. This specialist treats conditions such as anemia, clotting disorders, sickle cell disease, hemophilia, leukemia and lymphoma.
Practice Associates & Co-Workers
Healthcare professionals and specialists practicing at this location or sharing practice phone/fax
Internal Medicine - Hematology & Oncology
Doctor of Medicine (M.D.)
Nurse Practitioner
Internal Medicine - Hematology & Oncology
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Chronological log of verified NPI updates, location relocations, credentials, and registry changes
Record deactivated on June 18, 2026
NPI status registered as active in NPPES database
Registered at 20 WORCESTER CENTER BLVD, WORCESTER, MA 016081312 (Tel: 5083683168)
Registered at 630 PLANTATION ST, WOT 12TH FL ATTN: PHYSICIAN SERVICES, WORCESTER, MA 016052038 (Tel: 5083685529)
Recorded as LASZLO LEB, MD
Internal Medicine (License #40628 in MA)
First registered as active Individual Practitioner in NPPES Database.
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NPI Administrative Meta
Mailing Address
630 Plantation St, Wot 12th Fl Attn: Physician Services
Worcester, MA 016052038
Phone: 5083685529
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