Gordon Buchanan, MD, PHD
Gordon Buchanan, MD, PHD is an Epilepsy Physician in New Haven, CT, registered under NPI 1558543595. This provider registers 2 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 20 YORK ST T-209, New Haven, CT 06510. 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 |
|---|---|---|
| MD-42117 | IA | Epilepsy Physician primary |
| 046592 | CT | Neurology Physician |
| MD-42117 | IA | Neurology Physician |
Licences are recorded in 2 states: IA, CT. Providers licensed in several states often practise near a state border or deliver telehealth across state lines.
- Status
- Approved
- Provider type
- Practitioner - Epileptologists
- PAC ID
- 8820275613
- Enrollment ID
- I20150106002087
Medicare enrolment is recorded as approved under the provider type Practitioner - Epileptologists. 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.
Licensed in 2 states
This provider holds licences in 2 states: Connecticut and Iowa. The practice address on file is in New Haven, CT, 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
- 046592
- Specialty
- Neurology Physician
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 Epilepsy covers
Epilepsy is a subspecialty of neurology focused on the diagnosis and treatment of patients with epilepsy, including new-onset, medically refractory epilepsy, psychogenic nonepileptic seizures, and epilepsy in special populations (the elderly, women, patients with co-morbidities). Epilepsy is a multidisciplinary field that provides comprehensive care of the patient.<br/> NUCC Health Care Provider Taxonomy, code 2084E0001X
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 | |
|---|---|---|---|---|
| 2084E0001X | Epilepsy Physician Epilepsy | MD-42117 | IA | primary |
| 2084N0400X | Neurology Physician Neurology | 046592 | CT | |
| 2084N0400X | Neurology Physician Neurology | MD-42117 | IA |
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 | 1558543595 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Dec 1, 2007 |
| Last updated | Nov 16, 2023 |
| Status | Active |
| Sole proprietor | Yes |
| Credential | MD, PHD |
| Practice address |
20 YORK ST T-209 New Haven, CT 06510 (203) 688-2259 Fax (203) 688-5599 |
| Mailing address |
15 YORK ST LCI-916 New Haven, CT 06510 |
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 | 5 | 5 | 8 | 5 | 4 | 3 | 5 | 9 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 5 | 1 | 8 | 1 | 4 | 6 | 5 | 9 |
Sum = 65 · next multiple of 10 = 70 · check digit = 5 · actual last digit = 5
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.