Nicholas Gallagher
Nicholas Gallagher is an Addiction Medicine (Internal Medicine) Physician in Augusta, ME, registered under NPI 1629465208. This provider registers 3 separate taxonomy codes, which usually means they practise across more than one recognised specialty. NPPES records them as a sole proprietor, meaning the practice is not incorporated as a separate legal entity.
Getting there
The practice address on file is 35 MEDICAL CENTER PKWY, Augusta, ME 04330. 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 |
|---|---|---|
| DO3075 | ME | Addiction Medicine (Internal Medicine)… primary |
| 83039 | CT | Addiction Medicine (Internal Medicine)… |
| DO00947 | RI | Emergency Medicine Physician |
Licences are recorded in 3 states: ME, CT, RI. Providers licensed in several states often practise near a state border or deliver telehealth across state lines.
- Status
- Approved
- Provider type
- Practitioner - Addiction Medicine
- PAC ID
- 5698029452
Medicare enrolment is recorded as approved under the provider type Practitioner - Addiction Medicine. This means the provider is enrolled to bill Medicare, though it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
Licensed in 3 states
This provider holds licences in 3 states: Connecticut, Maine and Rhode Island. The practice address on file is in Augusta, 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
- 83039
- Specialty
- Addiction Medicine (Internal Medicine)…
- Licence
- DO3075
- Specialty
- Addiction Medicine (Internal Medicine)…
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 Addiction Medicine covers
An internist doctor of osteopathy that specializes in the treatment of addiction disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine can obtain a Certificate of Added Qualifications in the field of Addiction Medicine. NUCC Health Care Provider Taxonomy, code 207RA0401X
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 | |
|---|---|---|---|---|
| 207RA0401X | Addiction Medicine (Internal Medicine) Physician Addiction Medicine | DO3075 | ME | primary |
| 207RA0401X | Addiction Medicine (Internal Medicine) Physician Addiction Medicine | 83039 | CT | |
| 207P00000X | Emergency Medicine Physician | DO00947 | RI | |
| 390200000X | Student in an Organized Health Care Education/Training Program | — | — |
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 | 1629465208 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Apr 21, 2015 |
| Last updated | Oct 22, 2025 |
| Status | Active |
| Sole proprietor | Yes |
| Practice address |
35 MEDICAL CENTER PKWY Augusta, ME 04330 (207) 248-0097 Fax (207) 248-0094 |
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 | 6 | 2 | 9 | 4 | 6 | 5 | 2 | 0 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 6 | 4 | 9 | 8 | 6 | 1 | 2 | 0 |
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.