DR. FRED LEFFERT M.D.
NPI 1073691580
Allergy & Immunology - Allergy in Greenville, SC

NPI Status: Active since November 01, 2006

Contact Information

130 MALLARD ST
GREENVILLE, SC
ZIP 29601
Phone: (864) 233-1534
Fax: (864) 751-6020

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

Individual
Male
Allergy & Immunology
Allergy

About FRED LEFFERT

This page provides the complete NPI Profile along with additional information for Fred Leffert, a provider established in Greenville, South Carolina with a medical specialization in Allergy & Immunology, focusing in allergy . The healthcare provider is registered in the NPI registry with number 1073691580 assigned on November 2006. The practitioner's primary taxonomy code is 207KA0200X with license number 9899 (SC). The provider is registered as an individual and his NPI record was last updated 19 years ago.

NPI: 1073691580
Provider Name: DR. FRED LEFFERT M.D.
Gender: Male
Entity Type: Individual
Location Address: 130 MALLARD ST GREENVILLE, SC 29601
Location Phone: (864) 233-1534
Location Fax: (864) 751-6020
Mailing Address: 20 RED FOX CT GREENVILLE, SC 29615
Mailing Phone: (864) 288-7146
Is Sole Proprietor?: No
Enumeration Date: 11-01-2006
Last Update Date: 07-08-2007
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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: Allergy & Immunology Allergy
Taxonomy Code: 207KA0200X
Type: Allopathic & Osteopathic Physicians
License No.: 9899
License State: SC
Taxonomy Description: A physician who specializes in the diagnosis, treatment, and management of allergies. Source: National Uniform Claim Committee

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 1073691580, 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 → 14 → 1 + 4

Pos 4

Unchanged

Pos 5

Doubled → 12 → 1 + 2

Pos 6

Unchanged

Pos 7

Doubled → 2

Pos 8

Unchanged

Pos 9

Doubled → 16 → 1 + 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 7 → 14 → 5 6 → 12 → 3 1 → 2 8 → 16 → 7

Step 2: Add all digits plus the NPI constant

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

2 + 0 + 1 + 4 + 3 + 1 + 2 + 9 + 2 + 5 + 1 + 6 + 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 1073691580.