Mackay Hull, DDS, MD
Mackay Hull, DDS, MD is a provider specialising in Public Health Dentistry in Billings, MT, registered under NPI 1184780421. This provider registers 3 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
The practice address on file is 123 S 27TH ST, Billings, MT 59101. 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 |
|---|---|---|
| 1481 | MT | Public Health Dentistry primary |
| 1481 | MT | Oral and Maxillofacial Surgery (Dentist) |
| 4090 | MT | General Practice Physician |
This provider holds licence 1481 issued in MT. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
- Status
- Approved
- Provider type
- Practitioner - Oral Surgery
- PAC ID
- 1658546924
- Enrollment ID
- I20111214001090
Medicare enrolment is recorded as approved under the provider type Practitioner - Oral Surgery. Being enrolled means the provider can bill Medicare; it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
What Dental Public Health covers
The science and art of preventing and controlling dental diseases and promoting dental health through organized community efforts. It is that form of dental practice that serves the community as a patient rather than the individual. It is concerned with the dental health education of the public, with applied dental research, and with the administration of group dental care programs as well as the prevention and control of dental diseases on a community basis. NUCC Health Care Provider Taxonomy, code 1223D0001X
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 | |
|---|---|---|---|---|
| 1223D0001X | Public Health Dentistry Dental Public Health | 1481 | MT | primary |
| 1223S0112X | Oral and Maxillofacial Surgery (Dentist) Oral and Maxillofacial Surgery | 1481 | MT | |
| 208D00000X | General Practice Physician | 4090 | MT |
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 | 1184780421 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Dec 29, 2006 |
| Last updated | Mar 7, 2023 |
| Status | Active |
| Sole proprietor | No |
| Credential | DDS, MD |
| Practice address |
123 S 27TH ST Billings, MT 59101 (406) 247-3333 |
| Other identifiers |
10530
· Other (MT) 112397100 · Other (WY) 05577 · Other (IA) 1161 · Other (WY) 12-5437 · Medicaid (MT) 102867700 · Other (WY) 4090 · Other (MT) 1481 · Other (MT) 4368 · Other (NE) 04-2887 · Medicaid (MT) 1053 · Other |
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 | 1 | 8 | 4 | 7 | 8 | 0 | 4 | 2 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 1 | 7 | 4 | 5 | 8 | 0 | 4 | 4 |
Sum = 59 · next multiple of 10 = 60 · check digit = 1 · actual last digit = 1
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.