LOUIS P GUILLAUME OPA
NPI 1912021239
Physician Assistant - Surgical in Forest Hills, NY

NPI Status: Active since March 19, 2007

Contact Information

7035 113TH ST
FOREST HILLS, NY
ZIP 11375
Phone: (718) 990-4100
Fax: (718) 990-4624

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

Individual
Male
Physician Assistant
Surgical

About LOUIS GUILLAUME

This page provides the complete NPI Profile along with additional information for Louis Guillaume, a provider established in Forest Hills, New York with a medical specialization in Physician Assistant, focusing in surgical . The healthcare provider is registered in the NPI registry with number 1912021239 assigned on March 2007. The practitioner's primary taxonomy code is 363AS0400X with license number 000141 (NY). The provider is registered as an individual and his NPI record was last updated 19 years ago.

NPI: 1912021239
Provider Name: LOUIS P GUILLAUME OPA
Gender: Male
Entity Type: Individual
Location Address: 7035 113TH ST FOREST HILLS, NY 11375
Location Phone: (718) 990-4100
Location Fax: (718) 990-4624
Mailing Address: 7035 113TH ST FOREST HILLS, NY 11375
Mailing Phone: (718) 990-4100
Mailing Fax: (718) 990-4624
Is Sole Proprietor?: No
Enumeration Date: 03-19-2007
Last Update Date: 07-08-2007
Code Navigator

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: Physician Assistant Surgical
Taxonomy Code: 363AS0400X
Type: Physician Assistants & Advanced Practice Nursing Providers
License No.: 000141
License State: NY

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 1912021239, 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

Doubled → 2

Pos 2

Unchanged

Pos 3

Doubled → 2

Pos 4

Unchanged

Pos 5

Doubled → 0

Pos 6

Unchanged

Pos 7

Doubled → 2

Pos 8

Unchanged

Pos 9

Doubled → 6

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 1 → 2 0 → 0 1 → 2 3 → 6

Step 2: Add all digits plus the NPI constant

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

2 + 9 + 2 + 2 + 0 + 2 + 2 + 2 + 6 + 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 1912021239.