LASZLO LEB MD
NPI 1609857903
Internal Medicine - Hematology in Worcester, MA
NPI Status: Active since November 14, 2005
Contact Information
20 WORCESTER CENTER BLVD
WORCESTER, MA
ZIP 01608
Phone: (508) 368-3168
Fax: (508) 368-3166
- Individual
- Male
- Internal Medicine
- Hematology
About LASZLO LEB
This page provides the complete NPI Profile along with additional information for Laszlo Leb, an internist established in Worcester, Massachusetts with a medical specialization in Internal Medicine, focusing in hematology . The healthcare provider is registered in the NPI registry with number 1609857903 assigned on November 2005. The practitioner's primary taxonomy code is 207RH0000X with license number 40628 (MA). The provider is registered as an individual and his NPI record was last updated May 2026.
- NPI
- 1609857903
- Provider Name
- LASZLO LEB MD
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 20 WORCESTER CENTER BLVD WORCESTER, MA 01608
- Location Phone
- (508) 368-3168
- Location Fax
- (508) 368-3166
- Mailing Address
- 630 PLANTATION ST WOT 12TH FL ATTN: PHYSICIAN SERVICES WORCESTER, MA 01605
- Mailing Phone
- (508) 368-5529
- Mailing Fax
- (508) 368-3166
- Is Sole Proprietor?
- No
- Enumeration Date
- 11-14-2005
- Last Update Date
- 05-03-2026
- Code Navigator
An internist like Laszlo Leb is a physician who has completed an internal medicine residency and is board-certified or board-eligible in an internist specialty. Internists are trained to care for adults of all ages for many different medical conditions. An internist typically monitors chronic physical conditions, identifies acute diseases, provides family planning, provides counseling about wellness and disease prevention, etc.
Location Map
Specialty - Primary Taxonomy
The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.
- Classification
Internal Medicine Hematology
- Taxonomy Code
- 207RH0000X
- Type
- Allopathic & Osteopathic Physicians
- License No.
- 40628
- License State
- MA
- Taxonomy Description
- 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.
Insurance Plans Accepted
According to publicly available information the provider might be accepting the following health plans from these health insurance companies:
Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.
Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.
Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.
Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.
Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.
Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.
Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.
Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.
*Please verify directly with this provider to make sure your insurance plan is currently accepted.
Additional Identifiers
The NPI Enumerator encourages providers to submit additional identifiers with their NPI application although the submission of this information is optional. The additional identifier(s) section includes other numbers or codes currently or formerly used as an identifier for the provider by other public healthcare entities. The identifiers may include UPIN, NSC, OSCAR, DEA, Medicaid State or PIN identification numbers.
| Identifier | Type / Code | Identifier State | Identifier Issuer |
|---|---|---|---|
| 784228 | OTHER (01) | MVP HEALTH CARE | |
| 9900270 | OTHER (01) | FALLON COMMUNITY HEALTH | |
| N01713 | OTHER (01) | BLUE CARE ELECT | |
| 040628 | OTHER (01) | TUFTS HEALTH PLAN | |
| N01713 | OTHER (01) | MEDICARE B | |
| 04-2472266 | OTHER (01) | PRIVATE HEALTHCARE SYSTEM | |
| 042472266 | OTHER (01) | HEALTHCARE VALUE | |
| 1266084 | OTHER (01) | CIGNA HEALTH PLAN | |
| 04-2472266 | OTHER (01) | THREE RIVERS | |
| 27530 | OTHER (01) | HEALTHY SMART | |
| AA3714 | OTHER (01) | HARVARD PILGRIM | |
| 042472266 | OTHER (01) | TRICARE CHAMPUS | |
| 4385559 | OTHER (01) | AETNA US HEALTHCARE | |
| 042472266 | OTHER (01) | ONE HEALTH PLAN | |
| 1060864 | OTHER (01) | FIRST HEALTH | |
| 830005042 | OTHER (01) | RAILROAD MEDICARE | |
| N01713 | OTHER (01) | BLUE SHIELD INDEMNITY | |
| 27530 | OTHER (01) | CHILDRENS MEDICALSECURITY |
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NPI NPI Number Validation
How NPI Validation Works
The NPI validation process uses the ISO-standard Luhn algorithm, a mathematical "handshake", to ensure that a provider's 10-digit ID is authentic and free of common typing errors.
To verify the NPI 1609857903, we treat the final digit (3) as the Check Digit—the target answer we need to reach. The process begins by taking the first nine digits and adding a constant value of 24, which accounts for the "80840" prefix required for all U.S. health identifiers. We then double every other digit starting from the right and sum the individual digits of those results together. For this specific NPI, that total comes to 67. The final step is to find the difference between that total and the next multiple of ten (70 - 67 = 3).
Digit-by-digit view
Use the first nine digits for the calculation. Starting from the right, double every other digit. The last digit is the check digit and is not part of the calculation.
Step 1: Double every other digit from the right
Starting with the rightmost digit of the first nine digits, double every other value. If doubling creates a two-digit number, add those digits together.
Step 2: Add all digits plus the NPI constant
Add the transformed values, the unchanged digits, and the constant 24.
Step 3: Find the amount needed to reach the next multiple of 10
The next multiple of ten after 67 is 70. The difference is the calculated check digit.
Other Providers at the Same Location
The following 8 providers are registered at the same or a nearby location.
WORCESTER, MA 01608
WORCESTER, MA 01608
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1609857903, enumerated as an "individual" on November 14, 2005.
The provider is located at 20 WORCESTER CENTER BLVD WORCESTER, MA 01608 and the phone number is (508) 368-3168.
Internal Medicine with taxonomy code 207RH0000X and a focus in Hematology.
The provider might be accepting Accepts: Medicare, Medicaid, Tufts Health Plan, Cigna,. Please consult your insurance carrier or call the provider to verify.
