LINDA JO RUDDY RDH
NPI 1518778489
Dental Hygienist in Oshkosh, WI

NPI Status: Active since January 18, 2025

Contact Information

550 CITY CTR
OSHKOSH, WI
ZIP 54901
Phone: (920) 731-7445

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

Individual
Female
Dental Hygienist

About LINDA RUDDY

This page provides the complete NPI Profile along with additional information for Linda Ruddy, a provider established in Oshkosh, Wisconsin with a medical specialization in Dental Hygienist. The healthcare provider is registered in the NPI registry with number 1518778489 assigned on January 2025. The practitioner's primary taxonomy code is 124Q00000X with license number 5630-16 (WI). The provider is registered as an individual and her NPI record was last updated one year ago.

NPI: 1518778489
Provider Name: LINDA JO RUDDY RDH
Other Name: LINDA JO FRANK
Other Name Type: Former Name (1)
Gender: Female
Entity Type: Individual
Location Address: 550 CITY CTR OSHKOSH, WI 54901
Location Phone: (920) 731-7445
Mailing Address: 7097 COUNTRY CLUB RD OSHKOSH, WI 54902
Mailing Phone: (920) 379-9185
Is Sole Proprietor?: No
Enumeration Date: 01-18-2025
Last Update Date: 01-18-2025
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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: Dental Hygienist
Taxonomy Code: 124Q00000X
Type: Dental Providers
License No.: 5630-16
License State: WI
Taxonomy Description: An individual who has completed an accredited dental hygiene education program, and an individual who has been licensed by a state board of dental examiners to provide preventive care services under the supervision of a dentist. Functions that may be legally delegated to the dental hygienist vary based on the needs of the dentist, the educational preparation of the dental hygienist and state dental practice acts and regulations, but always include, at a minimum, scaling and polishing the teeth. To avoid misleading the public, no occupational title other than dental hygienist should be used to describe this dental auxiliary.

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 1518778489, 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 71. The final step is to find the difference between that total and the next multiple of ten (80 - 71 = 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 → 14 → 1 + 4

Pos 6

Unchanged

Pos 7

Doubled → 16 → 1 + 6

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 1 → 2 7 → 14 → 5 8 → 16 → 7 8 → 16 → 7

Step 2: Add all digits plus the NPI constant

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

2 + 5 + 2 + 8 + 1 + 4 + 7 + 1 + 6 + 4 + 1 + 6 + 24 = 71

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

The next multiple of ten after 71 is 80. The difference is the calculated check digit.

80 - 71 = 9

This NPI is valid

The calculated check digit is 9, which matches the last digit of 1518778489.