Bart Demaerschalk, M.D.
Bart Demaerschalk, M.D. is a Neurology Physician in Phoenix, AZ, registered under NPI 1457335994.
Getting there
The practice address on file is 5777 E MAYO BLVD, Phoenix, AZ 85054. 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 |
|---|---|---|
| 29047 | AZ | Neurology Physician primary |
| ME127231 | FL | Neurology Physician |
| 33826 | OK | Neurology Physician |
| 2016026970 | MO | Neurology Physician |
| 042.0012901 | VT | Neurology Physician |
| 60040 | MN | Neurology Physician |
| 15084 | NV | Neurology Physician |
| 075778 | GA | Neurology Physician |
| 43464 | IA | Neurology Physician |
| 16343 | NH | Neurology Physician |
| 65691 | WI | Neurology Physician |
| MD20204 | ME | Neurology Physician |
Licences are recorded in 12 states: AZ, FL, OK, MO, VT, MN, NV, GA, IA, NH, WI, ME. 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 12 states
This provider holds licences in 12 states: Arizona, Florida, Georgia, Iowa, Maine, Minnesota, Missouri, New Hampshire, Nevada, Oklahoma, Vermont and Wisconsin. The practice address on file is in Phoenix, AZ, 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 Neurology covers
A Neurologist specializes in the diagnosis and treatment of diseases or impaired function of the brain, spinal cord, peripheral nerves, muscles, autonomic nervous system, and blood vessels that relate to these structures. NUCC Health Care Provider Taxonomy, code 2084N0400X
All registered taxonomy codes
This provider registers 12 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 2084N0400X | Neurology Physician Neurology | 29047 | AZ | primary |
| 2084N0400X | Neurology Physician Neurology | ME127231 | FL | |
| 2084N0400X | Neurology Physician Neurology | 33826 | OK | |
| 2084N0400X | Neurology Physician Neurology | 2016026970 | MO | |
| 2084N0400X | Neurology Physician Neurology | 042.0012901 | VT | |
| 2084N0400X | Neurology Physician Neurology | 60040 | MN | |
| 2084N0400X | Neurology Physician Neurology | 15084 | NV | |
| 2084N0400X | Neurology Physician Neurology | 075778 | GA | |
| 2084N0400X | Neurology Physician Neurology | 43464 | IA | |
| 2084N0400X | Neurology Physician Neurology | 16343 | NH | |
| 2084N0400X | Neurology Physician Neurology | 65691 | WI | |
| 2084N0400X | Neurology Physician Neurology | MD20204 | ME |
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 | 1457335994 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Nov 29, 2005 |
| Last updated | Oct 31, 2025 |
| Status | Active |
| Sole proprietor | No |
| Credential | M.D. |
| Practice address |
5777 E MAYO BLVD Phoenix, AZ 85054 (480) 301-8000 |
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 | 4 | 5 | 7 | 3 | 3 | 5 | 9 | 9 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 4 | 1 | 7 | 6 | 3 | 1 | 9 | 9 |
Sum = 66 · next multiple of 10 = 70 · check digit = 4 · actual last digit = 4
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.