DR. GRETCHEN V. BLONDEAU PHARM.D., R.PH.
NPI 1730164575
Pharmacist in Slidell, LA

NPI Status: Active since December 14, 2005

Contact Information

1001 GAUSE BLVD
SLIDELL, LA
ZIP 70458
Phone: (985) 649-8523
Fax: (985) 649-8628

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

Individual
Female
Pharmacist

About GRETCHEN BLONDEAU

This page provides the complete NPI Profile along with additional information for Gretchen Blondeau, a provider established in Slidell, Louisiana with a medical specialization in Pharmacist. The healthcare provider is registered in the NPI registry with number 1730164575 assigned on December 2005. The practitioner's primary taxonomy code is 183500000X with license number 13649 (LA). The provider is registered as an individual and her NPI record was last updated one year ago.

NPI: 1730164575
Provider Name: DR. GRETCHEN V. BLONDEAU PHARM.D., R.PH.
Other Name: GRETCHEN A. VON HASSEL PHARM.D., R.PH.
Other Name Type: Other Name (5)
Gender: Female
Entity Type: Individual
Location Address: 1001 GAUSE BLVD SLIDELL, LA 70458
Location Phone: (985) 649-8523
Location Fax: (985) 649-8628
Mailing Address: 1001 GAUSE BLVD BOX 21 - PHARMACY SLIDELL, LA 70458
Mailing Phone: (985) 280-8523
Is Sole Proprietor?: No
Enumeration Date: 12-14-2005
Last Update Date: 09-11-2025
Code Navigator

A pharmacist like Gretchen Blondeau fills prescription medications, verifying instructions from physicians and offers expertise in the safe use of prescriptions. Pharmacists instruct patients on how to take a prescribed medicine and educate patients about potential side effects. Pharmacists might also conduct health and wellness screenings, provide immunizations, oversee the medications given to patients, and provide advice on healthy lifestyles.

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: Pharmacist
Taxonomy Code: 183500000X
Type: Pharmacy Service Providers
License No.: 13649
License State: LA
Taxonomy Description: An individual licensed by the appropriate state regulatory agency to engage in the practice of pharmacy. The practice of pharmacy includes, but is not limited to, assessment, interpretation, evaluation, and implementation, initiation, monitoring or modification of medication and or medical orders; the compounding or dispensing of medication and or medical orders; participation in drug and device procurement, storage, and selection; drug administration; drug regimen reviews; drug or drug-related research; provision of patient education and the provision of those acts or services necessary to provide medication therapy management services in all areas of patient care.

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 1730164575, we treat the final digit (5) 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 65. The final step is to find the difference between that total and the next multiple of ten (70 - 65 = 5).

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 → 2

Pos 6

Unchanged

Pos 7

Doubled → 8

Pos 8

Unchanged

Pos 9

Doubled → 14 → 1 + 4

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 1 → 2 4 → 8 7 → 14 → 5

Step 2: Add all digits plus the NPI constant

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

2 + 7 + 6 + 0 + 2 + 6 + 8 + 5 + 1 + 4 + 24 = 65

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

The next multiple of ten after 65 is 70. The difference is the calculated check digit.

70 - 65 = 5

This NPI is valid

The calculated check digit is 5, which matches the last digit of 1730164575.