Brooklynn Johnke, DT,RDH
Brooklynn Johnke, DT,RDH is a Dental Therapist in Oakland, ME, registered under NPI 1215604988. 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 2 EVERGREEN DR, Oakland, ME 04963. 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 |
|---|---|---|
| RDH4471 | ME | Dental Therapist primary |
| RDH4471 | ME | Dental Hygienist |
| H11055 | MN | Dental Hygienist |
| DT142 | MN | Dental Therapist |
Licences are recorded in 2 states: ME, MN. 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: Maine and Minnesota. The practice address on file is in Oakland, ME, but a licence in another state usually means they see patients there too — either at a second location or 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 Dental Therapist covers
A Dental Therapist is an individual who has completed an accredited or non-accredited dental therapy program and who has been authorized by the relevant state board or a tribal entity to provide services within the scope of their practice under the supervision of a dentist. Functions that may be delegated to the dental therapist vary based on the needs of the dentist, the educational preparation of the dental therapist and state dental practice acts and regulations. NUCC Health Care Provider Taxonomy, code 125J00000X
All registered taxonomy codes
This provider registers 4 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 125J00000X | Dental Therapist | RDH4471 | ME | primary |
| 124Q00000X | Dental Hygienist | RDH4471 | ME | |
| 124Q00000X | Dental Hygienist | H11055 | MN | |
| 125J00000X | Dental Therapist | DT142 | MN |
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 | 1215604988 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Aug 30, 2021 |
| Last updated | May 13, 2025 |
| Status | Active |
| Sole proprietor | No |
| Credential | DT,RDH |
| Practice address |
2 EVERGREEN DR Oakland, ME 04963 (207) 861-5801 |
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 | 2 | 1 | 5 | 6 | 0 | 4 | 9 | 8 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 2 | 2 | 5 | 3 | 0 | 8 | 9 | 7 |
Sum = 62 · next multiple of 10 = 70 · check digit = 8 · actual last digit = 8
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.