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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MS. MARY JULIANA WIDMEYER MD
NPI 1326468075
Psychiatry & Neurology - Neurology in Evanston, IL

Active since April 21, 2014PECOS EnrolledAccepts Medicare Assignment
95.69/100
CMS Quality Rating
1000 CENTRAL ST, EVANSTON, IL 60201(847) 570-2570(847) 570-2073 Get Directions Write a Review

NPPES record last updated: October 12, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Oct 12, 2026, Jul 5, 2018 (2 updates tracked since 2018).

About Ms. Mary Juliana Widmeyer Md NPPES

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

MS. MARY JULIANA WIDMEYER MD (NPI 1326468075) is an individual neurology provider in Evanston, Illinois, licensed in Illinois (036167928) and active in the NPI registry since April 2014. She is enrolled in Medicare PECOS, is affiliated with Northshore University Healthsystem - Evanston Hospital, and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1326468075
Entity TypeIndividualFemale
Primary Taxonomy2084N0400X
Provider Legal NameMS. MARY JULIANA WIDMEYERCredential: MD
Location Address1000 CENTRAL STEvanston, IL 60201-1777
Mailing Address2650 Ridge Ave Ste 1223Evanston, IL 60201-1700 · (847) 570-2040 · Fax (847) 733-5315
Phone(847) 570-2570
Fax(847) 570-2073
Sole ProprietorNo
Medical School CMSR Franklin University Of Med & Sci/chicago Medical SchoolGraduated 2014
Enumeration DateApril 21, 2014
Last NPPES UpdateOctober 12, 20262 updates tracked since enumeration
NPPES CertifiedOctober 12, 2026
✔ NPI 1326468075 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 IL · 036167928✔ Licensed in MN · 59845
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.
1000 CENTRAL ST, Evanston, IL 60201
Open in Google Maps ↗

Secondary Practice Locations 2

Location 1200 FIRST STREET SWROCHESTER, MN 55905-0001 · Phone (507) 284-2511
Location 21740 W Taylor StChicago, IL 60612-7232 · Phone (866) 600-2273

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter Health, Ambetter Health of Delaware, Oscar Health.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Ms. Mary Juliana Widmeyer Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID6002124575
PECOS Enrollment IDI20240430002920
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 Mary Widmeyer reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Endeavor Health Medical Group
Same address
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
University Health System, Inc
416 mi
Family Medicine
208 CENTRAL AVE W
Jamestown, TN 38556
  • Reassigned Medicare billing, Tennessee enrollment
  • 832 clinicians in this Medicare group
NPI 1669164307 (865) 670-6754

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 3

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.

Prolonged office or other outpatient evaluation and management service(s) beyond the maximum required time of the primary procedure which has been selected using total time on the date of the primary service; each additional 15 minutes by the physician or G2212
This service refers to extended doctor visits where your healthcare provider spends additional time evaluating and managing your health beyond the primary procedure's required time. This includes each extra 15 minutes spent by the physician on the same day as the primary service.
362 services150 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.
166 services127 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.
108 services108 patients

Hospital Affiliations CMS Care Compare 2

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Northshore University Healthsystem - Evanston Hospital

Acute Care Hospitals · Evanston, IL
5/5 CMS rating
OwnershipVoluntary non-profit - Other
CMS Certification Number140010
Location2650 Ridge AveEvanston, IL 60201 · Cook County
Emergency services Birthing friendly

Swedish Hospital

Acute Care Hospitals · Chicago, IL
2/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number140114
Location5145 N California AveChicago, IL 60625 · Cook County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60201 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
$138.86 typical visit price
range $60.08 – $183.39
Typical copayment $34.71 (range $15.02 – $45.84)
Most-billed visit code 99204
Established Patient
$105.70 typical visit price
range $18.97 – $148.12
Typical copayment $26.42 (range $4.74 – $37.03)
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.

95.69/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored through an Alternative Payment Model
Quality85.28
Promoting Interoperability100
Improvement Activities40

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.

ERIN MOHIP
Specialist
1000 CENTRAL ST, SUITE 101
EVANSTON, IL 60201
Cook County (847) 570-2060
BRITTANY JO MADDEN MS
Genetic Counselor, MS
1000 CENTRAL ST, SUITE #620
EVANSTON, IL 60201
Cook County (847) 570-1015
DR. STEPHANIE ANNE ROSS PH. D.
Psychologist (Clinical)
1000 CENTRAL ST, SUITE 800
EVANSTON, IL 60201
Cook County (773) 459-6756
JODIE COPPINGER
Audiologist-Hearing Aid Fitter
1000 CENTRAL ST, STE 717
EVANSTON, IL 60201
Cook County (847) 674-5247
VALLI P. STEWART MD
Internal Medicine
1000 CENTRAL ST, SUITE 640
EVANSTON, IL 60201
Cook County (847) 570-1410
LEWIS MICHAEL COHEN MD
Internal Medicine (Rheumatology)
1000 CENTRAL ST, SUITE 800
EVANSTON, IL 60201
Cook County (847) 570-2503
JAMES STEPHEN GROBER MD
Internal Medicine (Rheumatology)
1000 CENTRAL ST, SUITE 800
EVANSTON, IL 60201
Cook County (847) 570-1206
SUSAN AMY ROTH MD
Pediatrics
1000 CENTRAL ST, SUITE 765
EVANSTON, IL 60201
Cook County (847) 570-1507

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 Mary Widmeyer's NPI number?

The NPI number for Mary Widmeyer is 1326468075. It was assigned to this individual provider in the NPPES registry on April 21, 2014.

Where is Mary Widmeyer located?

Mary Widmeyer practices at 1000 Central St, Evanston, IL 60201. The listed phone number is (847) 570-2570.

What is Mary Widmeyer's specialty?

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

Is Mary Widmeyer enrolled in Medicare?

Yes. Mary Widmeyer is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Mary Widmeyer's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mary Widmeyer reassigns Medicare benefits to 2 organizations: Endeavor Health Medical Group (Evanston, IL) and University Health System, Inc (Jamestown, TN). 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 Mary Widmeyer's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Mary Widmeyer accept?

Health plans from Ambetter Health, Ambetter Health of Delaware and Oscar Health list Mary Widmeyer as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Mary Widmeyer affiliated with any hospitals?

According to CMS data, Mary Widmeyer is affiliated with Northshore University Healthsystem - Evanston Hospital and Swedish Hospital.

When was this NPI record last updated?

The NPPES record for Mary Widmeyer was last updated on October 12, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 days 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.