DR. GREGORY BRANDT LOUIE MD
NPI 1033307640
Radiology - Diagnostic Radiology in Palo Alto, CA

NPI Status: Active since October 09, 2007

Contact Information

300 PASTEUR DR # H1307
DEPT OF RADIOLOGY
PALO ALTO, CA
ZIP 94305
Phone: (650) 723-6661

NPI Profile Information
Primary Taxonomy
NPI Validation
Other Providers Same Location
Frequently Asked Questions

Individual
Male
Radiology
Diagnostic Radiology

About GREGORY LOUIE

This page provides the complete NPI Profile along with additional information for Gregory Louie, a provider established in Palo Alto, California with a medical specialization in Radiology, focusing in diagnostic radiology . The healthcare provider is registered in the NPI registry with number 1033307640 assigned on October 2007. The practitioner's primary taxonomy code is 2085R0202X with license number A90956 (CA). The provider is registered as an individual and his NPI record was last updated 19 years ago.

NPI: 1033307640
Provider Name: DR. GREGORY BRANDT LOUIE MD
Gender: Male
Entity Type: Individual
Location Address: 300 PASTEUR DR # H1307 DEPT OF RADIOLOGY PALO ALTO, CA 94305
Location Phone: (650) 723-6661
Mailing Address: 300 PASTEUR DR # H1307 DEPT OF RADIOLOGY PALO ALTO, CA 94305
Mailing Phone: (650) 723-6661
Is Sole Proprietor?: No
Enumeration Date: 10-09-2007
Last Update Date: 10-09-2007
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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: Radiology Diagnostic Radiology
Taxonomy Code: 2085R0202X
Type: Allopathic & Osteopathic Physicians
License No.: A90956
License State: CA
Taxonomy Description: A radiologist who utilizes x-ray, radionuclides, ultrasound and electromagnetic radiation to diagnose and treat disease.

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 1033307640, we treat the final digit (0) 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 60. The final step is to find the difference between that total and the next multiple of ten (60 - 60 = 0).

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

Doubled → 2

Pos 2

Unchanged

Pos 3

Doubled → 6

Pos 4

Unchanged

Pos 5

Doubled → 6

Pos 6

Unchanged

Pos 7

Doubled → 14 → 1 + 4

Pos 8

Unchanged

Pos 9

Doubled → 8

Check

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 3 → 6 3 → 6 7 → 14 → 5 4 → 8

Step 2: Add all digits plus the NPI constant

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

2 + 0 + 6 + 3 + 6 + 0 + 1 + 4 + 6 + 8 + 24 = 60

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

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

60 - 60 = 0

This NPI is valid

The calculated check digit is 0, which matches the last digit of 1033307640.