DR. BART M DEMAERSCHALK M.D.
NPI 1457335994
Psychiatry & Neurology - Neurology in Phoenix, AZ

Q: What is Bart Demaerschalk's NPI number?

The NPI number for Bart Demaerschalk is 1457335994. It was assigned to this individual provider in the NPPES registry on November 29, 2005.

Q: What is Bart Demaerschalk's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Neurology, with taxonomy code 2084N0400X.

Q: Is Bart Demaerschalk enrolled in Medicare?

No. Bart Demaerschalk has opted out of Medicare through October 10, 2027. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out. The provider remains eligible to order and refer services for Medicare patients.

Q: When was this NPI record last updated?

The NPPES record for Bart Demaerschalk was last updated on October 31, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since November 29, 2005Opted out of Medicare · through Oct 10, 2027

78.58/100

CMS Quality Rating

5777 E MAYO BLVD, PHOENIX, AZ 85054(480) 301-8000 Get Directions Write a Review

NPPES record last updated: October 31, 2025. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Sep 9, 2020, May 22, 2018 (2 updates tracked since 2018).

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About Dr. Bart M Demaerschalk M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. BART M DEMAERSCHALK M.D. (NPI 1457335994) is an individual neurology provider in Phoenix, Arizona, licensed in Arizona (29047) and active in the NPI registry since November 2005. He has opted out of Medicare through October 10, 2027 and remains eligible to order and refer and is a graduate of Other (1994).

NPPES Registry Identity

NPI1457335994

Entity TypeIndividualMale

Primary Taxonomy2084N0400X

Provider Legal NameDR. BART M DEMAERSCHALKCredential: M.D.

Location Address5777 E MAYO BLVDPhoenix, AZ 85054

Mailing Address5777 E Mayo BlvdPhoenix, AZ 85054-4502 · (480) 301-8000

Phone(480) 301-8000

Sole ProprietorNo

Medical School CMSOtherGraduated 1994

Enumeration DateNovember 29, 2005

Last NPPES UpdateOctober 31, 20252 updates tracked since enumeration

NPPES CertifiedOctober 31, 2025

✔ NPI 1457335994 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · NeurologyAllopathic & Osteopathic Physicians

Taxonomy Code2084N0400X

Licenses✔ Licensed in AZ · 29047✔ Licensed in FL · ME127231✔ Licensed in OK · 33826✔ Licensed in MO · 2016026970✔ Licensed in VT · 042.0012901✔ Licensed in MN · 60040✔ Licensed in NV · 15084✔ Licensed in GA · 075778✔ Licensed in IA · 43464✔ Licensed in NH · 16343✔ Licensed in WI · 65691✔ Licensed in ME · MD20204

Definition

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.

5777 E MAYO BLVD, Phoenix, AZ 85054

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Medica.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

ⓘ

Opted out of Medicare

Dr. Bart M Demaerschalk M.d. has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from October 10, 2025 through October 10, 2027.

Opt-Out Effective DateOctober 10, 2025

Opt-Out In Effect ThroughOctober 10, 2027Opt-out affidavits renew automatically every two years unless cancelled

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesAn opted-out provider can still order and refer for Medicare patients in the categories marked above, even though their own services are not covered.

Areas of Expertise CMS Part B claims 8

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233

Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.

52 services38 patients

Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223

Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.

42 services40 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

25 services24 patients

Emergency department visit with high level of medical decision making 99285

An emergency department visit for severe conditions is when you urgently seek medical help due to serious health issues. These could be severe injuries, breathing problems, unbearable pain, or sudden severe illness. Doctors and nurses will provide immediate care to stabilize your condition.

19 services19 patients

New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205

This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.

14 services14 patients

Telehealth consultation, emergency department or initial inpatient, typically 70 minutes or more communicating with the patient via telehealth G0427

A Telehealth consultation is a virtual visit where you can discuss your health concerns with a healthcare provider from the comfort of your home. In this process, which typically lasts 70 minutes or more, the provider can assess, diagnose, and offer treatment options for your condition using communication technology.

13 services13 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 85054 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$127.71 typical visit price

range $55.44 – $168.60

Typical copayment $31.92 (range $13.86 – $42.15)

Most-billed visit code 99204

Established Patient

$98.00 typical visit price

range $17.72 – $137.41

Typical copayment $24.50 (range $4.43 – $34.35)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

78.58/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored as part of a group practice

Quality

69.05

Promoting Interoperability

100

Improvement Activities

Cost

59.56

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

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