DKEIDEK, FERNYHOUGH, GILE, HAGEL, NOV & QUICKSTAD PLLC
NPI 1164360855
Dentist - Periodontics in Mercer Island, WA
NPI Status: Active since March 23, 2026
Contact Information
2737 77TH AVE SE STE 212
MERCER ISLAND, WA
ZIP 98040
Phone: (206) 232-0683
- Organization
- Dentist
- Periodontics
About DKEIDEK, FERNYHOUGH, GILE, HAGEL, NOV & QUICKSTAD PLLC
This page provides the complete NPI Profile along with additional information for Dkeidek, Fernyhough, Gile, Hagel, Nov & Quickstad Pllc, a provider established in Mercer Island, Washington operating as a Dentist, focusing in periodontics . The healthcare provider is registered in the NPI registry with number 1164360855 assigned on March 2026. The practitioner's primary taxonomy code is 1223P0300X. The provider is registered as an organization and their NPI record was last updated March 2026. The organization operates as a Single Specialty Group with one or more individual practitioners, all of who practice with the same area of specialization. The authorized official of this NPI record is Jana Johnson (Rcm)
- NPI
- 1164360855
- Provider Name
- DKEIDEK, FERNYHOUGH, GILE, HAGEL, NOV & QUICKSTAD PLLC
- Entity Type
- Organization
- Location Address
- 2737 77TH AVE SE STE 212 MERCER ISLAND, WA 98040
- Location Phone
- (206) 232-0683
- Mailing Address
- 2737 77TH AVE SE STE 212 MERCER ISLAND, WA 98040
- Mailing Phone
- (206) 232-0683
- Is Sole Proprietor?
- No
- Is Organization Subpart?
- No
- Enumeration Date
- 03-23-2026
- Last Update Date
- 03-23-2026
- Code Navigator
A dentist like Dkeidek, Fernyhough, Gile, Hagel, Nov & Quickstad Pllc is a skilled in and licensed provider that diagnoses and treats problems with patients teeth, gums, and related parts of the mouth. Dentists educate patients on how to take care of the teeth and gums and provide information on diet choices that affect oral health. Dentists must be licensed in the state in which they work.
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
Dentist Periodontics
- Taxonomy Code
- 1223P0300X
- Type
- Dental Providers
- Taxonomy Description
- That specialty of dentistry which encompasses the prevention, diagnosis and treatment of diseases of the supporting and surrounding tissues of the teeth or their substitutes and the maintenance of the health, function and esthetics of these structures and tissues.
Group Taxonomy 193400000X SINGLE SPECIALTY GROUP
This provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.
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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 1164360855, 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.
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.
Step 2: Add all digits plus the NPI constant
Add the transformed values, the unchanged digits, and the constant 24.
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.
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1164360855, enumerated as an "organization" on March 23, 2026.
The provider is located at 2737 77TH AVE SE STE 212 MERCER ISLAND, WA 98040 and the phone number is (206) 232-0683.
Dentist with taxonomy code 1223P0300X and a focus in Periodontics.
