Gregory Ringler, DMD
Gregory Ringler, DMD is a provider specialising in Oral and Maxillofacial Radiology Dentistry in Jacksonville, FL, registered under NPI 1821071804. This provider registers 2 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
The practice address on file is 2080 CHILD ST DEPT 5000, Jacksonville, FL 32214. We have not yet mapped what surrounds this office — parking, transit, and nearby pharmacies are added as our data collection reaches each location.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| 5774-15 | WI | Oral and Maxillofacial Radiology Dentistry primary |
| 5774-15 | WI | General Practice Dentistry |
| 019026610 | IL | General Practice Dentistry |
Licences are recorded in 2 states: WI, IL. Providers licensed in several states often practise near a state border or deliver telehealth across state lines.
This NPI does not appear in the PECOS Medicare enrolment file. Providers who do not bill Medicare — or who bill only through a group's enrolment — will not appear here. It is not a sign of any problem with the registration.
Licensed in 2 states
This provider holds licences in 2 states: Illinois and Wisconsin. Multi-state licensure often means the provider works near a state border, covers more than one office, or delivers care by telehealth. If the address above is far from you, it is worth calling to ask whether they practise closer to where you live.
Licence numbers are self-reported to NPPES at registration. They do not confirm a licence is currently active, in good standing, or valid for the specialty shown — only the state board can tell you that, which is why we link to each one.
What Oral and Maxillofacial Radiology covers
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. NUCC Health Care Provider Taxonomy, code 1223X0008X
All registered taxonomy codes
This provider registers 3 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 1223X0008X | Oral and Maxillofacial Radiology Dentistry Oral and Maxillofacial Radiology | 5774-15 | WI | primary |
| 1223G0001X | General Practice Dentistry General Practice | 5774-15 | WI | |
| 1223G0001X | General Practice Dentistry General Practice | 019026610 | IL |
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1821071804 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Nov 23, 2005 |
| Last updated | Jul 17, 2025 |
| Status | Active |
| Sole proprietor | No |
| Credential | DMD |
| Practice address |
2080 CHILD ST DEPT 5000 Jacksonville, FL 32214 (904) 542-9241 |
| Other identifiers |
019026610
· Medicaid (IL) 33812800 · Medicaid (WI) 9178431 · Other (IL) |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 8 | 2 | 1 | 0 | 7 | 1 | 8 | 0 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 8 | 4 | 1 | 0 | 7 | 2 | 8 | 0 |
Sum = 56 · next multiple of 10 = 60 · check digit = 4 · actual last digit = 4
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.