DR. GREGORY E RINGLER DMD
NPI 1821071804
Dentist - Oral and Maxillofacial Radiology in Jacksonville, FL

NPI Status: Active since November 23, 2005

Contact Information

2080 CHILD ST DEPT 5000
JACKSONVILLE, FL
ZIP 32214
Phone: (904) 542-9241

NPI Profile Information
Primary Taxonomy
Secondary Taxonomies
Insurance Plans Accepted
NPI Validation
Other Providers Same Location
Frequently Asked Questions

Individual
Male
Dentist
Oral and Maxillofacial Radiology

About GREGORY RINGLER

This page provides the complete NPI Profile along with additional information for Gregory Ringler, a provider established in Jacksonville, Florida with a medical specialization in Dentist, focusing in oral and maxillofacial radiology . The healthcare provider is registered in the NPI registry with number 1821071804 assigned on November 2005. The practitioner's primary taxonomy code is 1223X0008X with license number 5774-15 (WI). The provider is registered as an individual and his NPI record was last updated one year ago.

NPI: 1821071804
Provider Name: DR. GREGORY E RINGLER DMD
Gender: Male
Entity Type: Individual
Location Address: 2080 CHILD ST DEPT 5000 JACKSONVILLE, FL 32214
Location Phone: (904) 542-9241
Mailing Address: 2080 CHILD ST DEPT 5000 JACKSONVILLE, FL 32214
Mailing Phone: (904) 542-9241
Is Sole Proprietor?: No
Enumeration Date: 11-23-2005
Last Update Date: 07-17-2025
Code Navigator

A dentist like Gregory Ringler 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 Oral and Maxillofacial Radiology
Taxonomy Code: 1223X0008X
Type: Dental Providers
License No.: 5774-15
License State: WI
Taxonomy Description: The specialty of dentistry and discipline of radiology concerned with the production and interpretation of images and data produced by all modalities of radiant energy that are used for the diagnosis and management of diseases, disorders and conditions of the oral and maxillofacial region.

Secondary Taxonomies

The provider has reported to the NPI enumerator additional taxonomy codes. Multiple taxonomy codes may represent subspecialties or other areas of specialization the provider maybe licensed to practice.

No.	Taxonomy Code	Type	Classification / Specialization	License No. (State)
1	1223G0001X	Dental Providers	Dentist General Practice	5774-15 (WI)
2	1223G0001X	Dental Providers	Dentist General Practice	019026610 (IL)

Insurance Plans Accepted

According to publicly available information the provider might be accepting the following health plans from these health insurance companies:

Medicare

Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.

Medicaid

Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.

*Please verify directly with this provider to make sure your insurance plan is currently accepted.

Additional Identifiers

The NPI Enumerator encourages providers to submit additional identifiers with their NPI application although the submission of this information is optional. The additional identifier(s) section includes other numbers or codes currently or formerly used as an identifier for the provider by other public healthcare entities. The identifiers may include UPIN, NSC, OSCAR, DEA, Medicaid State or PIN identification numbers.

Identifier	Type / Code	Identifier State	Identifier Issuer
019026610	MEDICAID (05)	IL
33812800	MEDICAID (05)	WI
9178431	OTHER (01)	IL	DOREL

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 1821071804, we treat the final digit (4) 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 56. The final step is to find the difference between that total and the next multiple of ten (60 - 56 = 4).

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 → 0

Pos 6

Unchanged

Pos 7

Doubled → 2

Pos 8

Unchanged

Pos 9

Doubled → 0

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 0 → 0 1 → 2 0 → 0

Step 2: Add all digits plus the NPI constant

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

2 + 8 + 4 + 1 + 0 + 7 + 2 + 8 + 0 + 24 = 56

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

The next multiple of ten after 56 is 60. The difference is the calculated check digit.

60 - 56 = 4

This NPI is valid

The calculated check digit is 4, which matches the last digit of 1821071804.