Bart Demaerschalk, M.D.
NPI 1457335994 · Neurology Physician · Phoenix, AZ
Bart Demaerschalk, M.D. is a Neurology Physician provider in Phoenix, AZ (NPI 1457335994).
Provider details
- NPI number
- 1457335994
- Entity type
- Individual
- Primary specialty
- Neurology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- ME127231 (FL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
187 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 52 | $114 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 42 | $167 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 25 | $175 |
| Emergency Department Visit With High Level of Medical Decision Making99285 | 19 | $168 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 14 | $214 |
| Telehealth Consultation, Emergency Department Or Initial Inpatient, Typically 70 Minutes Or More Communicating With the Patient Via Telehealth |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$7,120 across 2 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-11-29
- Last updated
- 2025-10-31
- Certified
- 2025-10-31
Frequently asked questions
- What is Bart Demaerschalk's NPI number?
- Bart Demaerschalk's National Provider Identifier (NPI) is 1457335994, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Bart Demaerschalk's specialty?
- Bart Demaerschalk is listed in the NPPES registry with a primary specialty of Neurology Physician (Allopathic & Osteopathic Physicians).
- Where is Bart Demaerschalk located?
- Bart Demaerschalk's practice location on file with NPPES is 5777 E Mayo Blvd, Phoenix, AZ 85054.
- What is Bart Demaerschalk's phone number?
- The practice phone number listed in the NPPES registry for Bart Demaerschalk is (480) 301-8000.
- Is Bart Demaerschalk's NPI active?
- Yes — Bart Demaerschalk's NPI (1457335994) is active in the NPPES registry as of the last update on 2025-10-31.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.