Dental Providers / 1223G0001X
Individual · specialization · Medicare specialty C5
1223G0001X General Practice Dentistry
1223G0001X is the taxonomy code for General Practice, a specialization of Dentist, in the NUCC group “Dental Providers”. It is a code for individual providers — the kind used on a Type 1 NPI. Medicare maps it to specialty C5, Dentist, under which 6,038 practitioners are enrolled.
- 1Taxonomy code 1223G0001X
- 2Level Specialization
- 3Medicare specialty C5 Dentist
- 4Codes in this group 20
Definition
A general dentist is the primary dental care provider for patients of all ages. The general dentist is responsible for the diagnosis, treatment, management and overall coordination of services related to patients' oral health needs.
— NUCC Health Care Provider Taxonomy, version 26.1
Where 1223G0001X sits
- Group: Dental Providers — code 10 of 20 in the group
- Classification: Dentist 122300000X
- Specialization: General Practice 1223G0001X
Choose 1223G0001X over the general Dentist code (122300000X) when the provider's training or certification is specifically in general practice; the general code covers the classification as a whole. A provider may report more than one taxonomy code on an NPI but marks one as primary.
Medicare
CMS's taxonomy crosswalk links 1223G0001X to Medicare specialty C5 (Dentist). That specialty — not the taxonomy code itself — is what Medicare enrollment records and uses for payment. 6,038 practitioners are enrolled under it nationally, and 1 other taxonomy code map to the same specialty.
Other codes under the same Medicare specialty: 122300000X Dentist.
Related codes
| Code | Dentist — other specializations |
|---|---|
| 1223D0004X | Dental Anesthesiology |
| 1223D0001X | Dental Public Health |
| 1223E0200X | Endodontics |
| 1223P0106X | Oral and Maxillofacial Pathology |
| 1223X0008X | Oral and Maxillofacial Radiology |
| 1223S0112X | Oral and Maxillofacial Surgery |
The nearest 6 of 13 other codes under Dentist; all are on the group page.
History of 1223G0001X
NUCC's notes record no dated changes for 1223G0001X. The code set is republished every January and July, when codes are added, retitled or marked inactive; this page reflects version 26.1, so check the NUCC site if you are reading it after the next release.
Similar codes in other groups
If 1223G0001X is not quite right, these codes in other groups share a word with it — often the same field practised by a different kind of provider:
- 208D00000X General Practice Physician (Allopathic & Osteopathic Physicians)
- 163WG0000X General Practice Registered Nurse (Nursing Service Providers)
- 1835G0000X Pharmacist (Pharmacy Service Providers)
- 367A00000X Advanced Practice Midwife (Physician Assistants & Advanced Practice Nursing Providers)
- 213EG0000X Podiatrist (Podiatric Medicine & Surgery Service Providers)
Find providers with 1223G0001X
Using 1223G0001X
The code goes in the taxonomy field of the NPI application in NPPES, and on claims where a payer asks for it — box 24J (shaded) or 33b on the CMS-1500 with the ZZ qualifier, or the PRV segment of an 837 electronic claim. Payers match it against the taxonomy on the NPI record and, for Medicare, against the specialty on the enrollment, so all three should agree. To see which code a provider uses, search their NPI in the lookup.
Sources: NUCC Health Care Provider Taxonomy code set, version 26.1 (CSV); CMS Medicare Provider and Supplier Taxonomy Crosswalk, August 2026; CMS Medicare Fee-For-Service Public Provider Enrollment, extract of 2026-09-29. Checked 2026-10-24. Methodology.