DEREK STEWART M.D.
NPI 1821309519
Emergency Medicine in Phoenix, AZ

Q: What is Derek Stewart's NPI number?

The NPI number for Derek Stewart is 1821309519. It was assigned to this individual provider in the NPPES registry on June 28, 2010.

Q: What is Derek Stewart's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Q: When was this NPI record last updated?

The NPPES record for Derek Stewart was last updated on December 8, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 years 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 June 28, 2010PECOS Enrolled

250 E DUNLAP AVE, PHOENIX, AZ 85020(602) 870-6316(602) 870-6091 Get Directions Write a Review

NPPES record last updated: December 8, 2016. Verified against the NPPES registry weekly; last sync: November 01, 2026.

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About Derek Stewart M.d. NPPES

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

DEREK STEWART M.D. (NPI 1821309519) is an individual emergency medicine provider in Phoenix, Arizona, licensed in Arizona (45723) and active in the NPI registry since June 2010. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1821309519

Entity TypeIndividualMale

Primary Taxonomy207P00000X

Provider Legal NameDEREK STEWARTCredential: M.D.

Location Address250 E DUNLAP AVEPhoenix, AZ 85020-2825

Mailing Address250 E Dunlap AvePhoenix, AZ 85020-2825 · (602) 870-6316 · Fax (602) 870-6091

Phone(602) 870-6316

Fax(602) 870-6091

Sole ProprietorYes

Enumeration DateJune 28, 2010

Last NPPES UpdateDecember 8, 2016

✔ NPI 1821309519 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207P00000X

License✔ Licensed in AZ · 45723

Definition

An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.

250 E DUNLAP AVE, Phoenix, AZ 85020

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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Derek Stewart M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show Derek Stewart reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Salem Emergency Physicians Service, PC

978 mi

Emergency Medicine

890 OAK STREET, SE BUILDING 'A'
Salem, OR 97301

Reassigned Medicare billing, Oregon enrollment
47 clinicians in this Medicare group

NPI 1063454395 (503) 561-5634

Salem Health West Valley

986 mi

Critical Access

525 SE WASHINGTON ST
Dallas, OR 97338

Reassigned Medicare billing, Oregon enrollment
254 clinicians in this Medicare group

NPI 1245237486 (503) 623-8301

Northwest Emergency Physicians LLC

1,136 mi

Emergency Medicine

330 S STILLAGUAMISH AVE
Arlington, WA 98223

Reassigned Medicare billing, Oregon enrollment
43 clinicians in this Medicare group

NPI 1235172370 (925) 251-6901

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 4

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.

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.

187 services180 patients

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 93010

A routine electrocardiogram (ECG) with 12 leads is a simple, non-invasive test that records the electrical activity of your heart. It helps in identifying heart conditions by detecting irregularities in your heart rhythms. The results are interpreted and a report is provided.

112 services93 patients

Critical care, first 30-74 minutes 99291

Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.

73 services72 patients

Emergency department visit with moderate level of medical decision making 99284

An emergency department visit for a high-severity issue means you're experiencing a serious health problem that needs immediate attention. This could be a severe injury, serious illness, or life-threatening condition. Medical professionals will provide urgent care to stabilize your condition.

72 services70 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 85020 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

$85.89 typical visit price

range $55.44 – $168.60

Typical copayment $21.47 (range $13.86 – $42.15)

Most-billed visit code 99203

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.

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.

BRADY PAUL DENNISON DO

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