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DR. MEGAN LYNN MCALLISTER M.D.
NPI 1437191855
Emergency Medicine in Naperville, IL

Active since June 11, 2006PECOS Enrolled
801 S WASHINGTON ST, NAPERVILLE, IL 60540(630) 527-3000 Get Directions Write a Review

NPPES record last updated: November 25, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. Megan Lynn Mcallister M.d. NPPES

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

DR. MEGAN LYNN MCALLISTER M.D. (NPI 1437191855) is an individual emergency medicine provider in Naperville, Illinois, licensed in Illinois (036126448) and active in the NPI registry since June 2006. She is enrolled in Medicare PECOS and maintains a secondary practice location in Los Angeles.

NPPES Registry Identity

NPI1437191855
Entity TypeIndividualFemale
Primary Taxonomy207P00000X
Provider Legal NameDR. MEGAN LYNN MCALLISTERCredential: M.D.
Location Address801 S WASHINGTON STNaperville, IL 60540-7430
Mailing Address2650 Ridge Ave Ste 1223Evanston, IL 60201-1700
Phone(630) 527-3000
Sole ProprietorNo
Enumeration DateJune 11, 2006
Last NPPES UpdateNovember 25, 2025
NPPES CertifiedNovember 25, 2025
✔ NPI 1437191855 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
Licenses✔ Licensed in IL · 036126448✔ Licensed in CA · A85608
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.
801 S WASHINGTON ST, Naperville, IL 60540
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Secondary Practice Location 1

Location 11720 E Cesar E Chavez Ave, emergency dept.Los Angeles, CA 90033-2414 · Phone (323) 268-5000

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Megan Lynn Mcallister 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

2

Medicare enrollment records show Megan Mcallister reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Edward Hospital
Same address
General Acute Care Hospital
801 S WASHINGTON ST
Naperville, IL 60540
  • Reassigned Medicare billing, Illinois enrollment
  • 268 clinicians in this Medicare group
NPI 1013969013 (630) 655-0450
Endeavor Health Medical Group
32 mi
Allergy & Immunology
1000 CENTRAL ST
Evanston, IL 60201
  • Reassigned Medicare billing, Illinois enrollment
  • 4,841 clinicians in this Medicare group
NPI 1497701882 (847) 570-5235

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 5

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.
216 services211 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.
180 services173 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.
136 services135 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.
16 services16 patients
Emergency department visit with low level of medical decision making 99283
An emergency department visit for a problem of moderate severity involves immediate medical attention for issues like minor fractures, burns, or high fever. The healthcare team will assess your condition, provide necessary treatment, and may suggest further tests or admission if required.
11 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60540 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
$93.02 typical visit price
range $59.81 – $181.38
Typical copayment $23.25 (range $14.95 – $45.34)
Most-billed visit code 99203
Established Patient
$105.07 typical visit price
range $19.15 – $147.12
Typical copayment $26.26 (range $4.78 – $36.78)
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.

DR. HAFEZ M. SAMI M.D.
Pain Medicine (Interventional Pain Medicine)
801 S WASHINGTON ST
NAPERVILLE, IL 60540
Dupage County (630) 348-3300
MICHAEL J. HARTMANN MD
Emergency Medicine
801 S WASHINGTON ST
NAPERVILLE, IL 60540
Dupage County (630) 527-3000
SEEMA ISHAQ JEELANI D.O.
Emergency Medicine
801 S WASHINGTON ST
NAPERVILLE, IL 60540
Dupage County (630) 527-3000
CORTNEY COLE MD
Family Medicine (Hospice and Palliative Medicine)
801 S WASHINGTON ST
NAPERVILLE, IL 60540
Dupage County (630) 527-3000
EDWARD HOSPITAL
General Acute Care Hospital
801 S WASHINGTON ST
NAPERVILLE, IL 60540
Dupage County (630) 655-0450
DR. HODA A. EL- ASMAR MD
Internal Medicine (Infectious Disease)
801 S WASHINGTON ST, EDWARD HOSPITAL, ADMINISTRATION, VPMA OFFICE
NAPERVILLE, IL 60540
Dupage County (630) 527-5647
AMAAR MASOOD MALIK DO
Radiology (Diagnostic Radiology)
801 S WASHINGTON ST
NAPERVILLE, IL 60540
Dupage County (630) 527-3200
DR. SANGITA RANGALA M.D.
Emergency Medicine
801 S WASHINGTON ST
NAPERVILLE, IL 60540
Dupage County (630) 527-3288

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Megan Mcallister's NPI number?

The NPI number for Megan Mcallister is 1437191855. It was assigned to this individual provider in the NPPES registry on June 11, 2006.

Where is Megan Mcallister located?

Megan Mcallister practices at 801 S Washington St, Naperville, IL 60540. The listed phone number is (630) 527-3000.

What is Megan Mcallister's specialty?

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

Is Megan Mcallister enrolled in Medicare?

Yes. Megan Mcallister is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Megan Mcallister's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Megan Mcallister reassigns Medicare benefits to 2 organizations: Edward Hospital (Naperville, IL) and Endeavor Health Medical Group (Evanston, IL). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Megan Mcallister's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Megan Mcallister was last updated on November 25, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.