SALLY WILLIS
NPI 1689503799
Specialist in Delaware, OH

NPI Status: Active since May 15, 2026

Contact Information

824 BOWTOWN RD
DELAWARE, OH
ZIP 43015
Phone: (740) 695-7795
Fax: (740) 362-4411

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Newly Listed Provider
This NPI profile has been added to the NPI registry within the last 30 days.

Table of Contents

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

Individual
Female
Specialist

About SALLY WILLIS

This page provides the complete NPI Profile along with additional information for Sally Willis, a provider established in Delaware, Ohio with a medical specialization in Specialist. The healthcare provider is registered in the NPI registry with number 1689503799 assigned on May 2026. The practitioner's primary taxonomy code is 174400000X. The provider is registered as an individual and her NPI record was last updated May 2026.

NPI: 1689503799
Provider Name: SALLY WILLIS
Gender: Female
Entity Type: Individual
Location Address: 824 BOWTOWN RD DELAWARE, OH 43015
Location Phone: (740) 695-7795
Location Fax: (740) 362-4411
Mailing Address: 16 W LONG ST COLUMBUS, OH 43215
Mailing Phone: (614) 225-0990
Is Sole Proprietor?: Yes
Enumeration Date: 05-15-2026
Last Update Date: 05-15-2026
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Location Map

Secondary Locations

950 Meadow Dr Ste A
Mount Gilead, OH 43338
(419) 949-2000

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: Specialist
Taxonomy Code: 174400000X
Type: Other Service Providers
Taxonomy Description: An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.

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 1689503799, 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 → 16 → 1 + 6

Pos 4

Unchanged

Pos 5

Doubled → 10 → 1 + 0

Pos 6

Unchanged

Pos 7

Doubled → 6

Pos 8

Unchanged

Pos 9

Doubled → 18 → 1 + 8

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 8 → 16 → 7 5 → 10 → 1 3 → 6 9 → 18 → 9

Step 2: Add all digits plus the NPI constant

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

2 + 6 + 1 + 6 + 9 + 1 + 0 + 0 + 6 + 7 + 1 + 8 + 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 1689503799.