Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

GREG BALUYOT PIZARRO MD
NPI 1225012529
Pathology - Anatomic Pathology in Warwick, RI

Active since December 01, 2005
647 JEFFERSON BLVD, WARWICK, RI 02886(401) 467-1400(401) 739-8045 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: July 19, 2026.

  • Individual
  • Male
  • Pathology
  • Anatomic Pathology

About GREG PIZARRO

This page provides the complete NPI Profile along with additional information for Greg Pizarro, a provider established in Warwick, Rhode Island with a medical specialization in Pathology, focusing in anatomic pathology . The healthcare provider is registered in the NPI registry with number 1225012529 assigned on December 2005. The practitioner's primary taxonomy code is 207ZP0101X with license number MD11067 (RI). The provider is registered as an individual and his NPI record was last updated July 2026.

NPI
1225012529
Provider Name
GREG BALUYOT PIZARRO MD
Gender
Male
Entity Type
Individual
Location Address
647 JEFFERSON BLVD WARWICK, RI 02886
Location Phone
(401) 467-1400
Location Fax
(401) 739-8045
Mailing Address
8 SEABREEZE LN WARWICK, RI 02886
Mailing Phone
(401) 398-0355
Is Sole Proprietor?
No
Enumeration Date
12-01-2005
Last Update Date
07-13-2026
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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

Pathology Anatomic Pathology

Taxonomy Code
207ZP0101X
Type
Allopathic & Osteopathic Physicians
License No.
MD11067
License State
RI
Taxonomy Description
A pathologist deals with the causes and nature of disease and contributes to diagnosis, prognosis and treatment through knowledge gained by the laboratory application of the biologic, chemical and physical sciences. A pathologist uses information gathered from the microscopic examination of tissue specimens, cells and body fluids, and from clinical laboratory tests on body fluids and secretions for the diagnosis, exclusion and monitoring of disease.

Secondary Taxonomies

The provider has reported to the NPI enumerator additional taxonomy codes. Multiple taxonomy codes may represent subspecialties or other areas of specialization the provider maybe licensed to practice.

No. Taxonomy Code Type Classification /
Specialization
License No. (State)
1207ZP0101XAllopathic & Osteopathic Physicians

Pathology
Anatomic Pathology

041072 (CT)
2207ZP0101XAllopathic & Osteopathic Physicians

Pathology
Anatomic Pathology

219028 (MA)
3207ZP0101XAllopathic & Osteopathic Physicians

Pathology
Anatomic Pathology

C50950 (CA)
4207ZP0101XAllopathic & Osteopathic Physicians

Pathology
Anatomic Pathology

MD049356L (PA)
5207ZP0101XAllopathic & Osteopathic Physicians

Pathology
Anatomic Pathology

C10005211 (DE)

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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 1225012529, we treat the final digit (9) 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 51. The final step is to find the difference between that total and the next multiple of ten (60 - 51 = 9).

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.

Pos 1
1
Doubled → 2
Pos 2
2
Unchanged
Pos 3
2
Doubled → 4
Pos 4
5
Unchanged
Pos 5
0
Doubled → 0
Pos 6
1
Unchanged
Pos 7
2
Doubled → 4
Pos 8
5
Unchanged
Pos 9
2
Doubled → 4
Check
9
Target digit
Regular digit Doubled digit Check digit

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.

1 → 2 2 → 4 0 → 0 2 → 4 2 → 4

Step 2: Add all digits plus the NPI constant

Add the transformed values, the unchanged digits, and the constant 24.

2 + 2 + 4 + 5 + 0 + 1 + 4 + 5 + 4 + 24 = 51

Step 3: Find the amount needed to reach the next multiple of 10

The next multiple of ten after 51 is 60. The difference is the calculated check digit.

60 - 51 = 9
This NPI is valid
The calculated check digit is 9, which matches the last digit of 1225012529.

Other Providers at the Same Location


The following 1 provider is registered at the same or a nearby location.

Dermatology
647 JEFFERSON BLVD
WARWICK, RI 02886

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1225012529, enumerated as an "individual" on December 01, 2005.

The provider is located at 647 JEFFERSON BLVD WARWICK, RI 02886 and the phone number is (401) 467-1400.

Pathology with taxonomy code 207ZP0101X and a focus in Anatomic Pathology.