MR. EMMETT DOWNING LDO
NPI 1326517665
Technician/Technologist - Optician in Phoenix, AZ

NPI Status: Active since November 15, 2018

Contact Information

2337 W NORTHERN AVE
PHOENIX, AZ
ZIP 85021
Phone: (602) 995-8848
Fax: (602) 995-2980

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

Individual
Male
Technician/Technologist
Optician

About EMMETT DOWNING

This page provides the complete NPI Profile along with additional information for Emmett Downing, a provider established in Phoenix, Arizona with a medical specialization in Technician/technologist, focusing in optician . The healthcare provider is registered in the NPI registry with number 1326517665 assigned on November 2018. The practitioner's primary taxonomy code is 156FX1800X with license number LDO-002652 (AZ). The provider is registered as an individual and his NPI record was last updated 8 years ago.

NPI: 1326517665
Provider Name: MR. EMMETT DOWNING LDO
Gender: Male
Entity Type: Individual
Location Address: 2337 W NORTHERN AVE PHOENIX, AZ 85021
Location Phone: (602) 995-8848
Location Fax: (602) 995-2980
Mailing Address: 2337 W NORTHERN AVE PHOENIX, AZ 85021
Mailing Phone: (602) 995-8848
Mailing Fax: (602) 995-2980
Is Sole Proprietor?: No
Enumeration Date: 11-15-2018
Last Update Date: 11-15-2018
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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: Technician/Technologist Optician
Taxonomy Code: 156FX1800X
Type: Eye and Vision Services Providers
License No.: LDO-002652
License State: AZ
Taxonomy Description: Opticians help fit eyeglasses and contact lenses, following prescriptions from Ophthalmologists and Optometrists. They also help customers decide which eyeglass frame or contact lenses to buy.

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 1326517665, 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 55. The final step is to find the difference between that total and the next multiple of ten (60 - 55 = 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 → 4

Pos 4

Unchanged

Pos 5

Doubled → 10 → 1 + 0

Pos 6

Unchanged

Pos 7

Doubled → 14 → 1 + 4

Pos 8

Unchanged

Pos 9

Doubled → 12 → 1 + 2

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 2 → 4 5 → 10 → 1 7 → 14 → 5 6 → 12 → 3

Step 2: Add all digits plus the NPI constant

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

2 + 3 + 4 + 6 + 1 + 0 + 1 + 1 + 4 + 6 + 1 + 2 + 24 = 55

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

The next multiple of ten after 55 is 60. The difference is the calculated check digit.

60 - 55 = 5

This NPI is valid

The calculated check digit is 5, which matches the last digit of 1326517665.