DR. MARY MICHAEL WESTERHOLM M.D.
NPI 1790951093
Internal Medicine in Winfield, IL

Active since May 06, 2008PECOS EnrolledAccepts Medicare Assignment
25 N WINFIELD RD, WINFIELD, IL 60190(630) 653-0848(630) 653-7746 Get Directions Write a Review

NPPES record last updated: April 15, 2013. Verified against the NPPES registry weekly; last sync: July 19, 2026.

About Dr. Mary Michael Westerholm M.d. NPPES

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

DR. MARY MICHAEL WESTERHOLM M.D. (NPI 1790951093) is an individual internal medicine provider in Winfield, Illinois, licensed in Illinois (036116854) and active in the NPI registry since May 2008. She is enrolled in Medicare PECOS and is a graduate of Loyola University Of Chicago, Stritch School Of Medicine (2004).

NPPES Registry Identity

NPI1790951093
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameDR. MARY MICHAEL WESTERHOLMCredential: M.D.
Location Address25 N WINFIELD RDWinfield, IL 60190-1222
Mailing Address25 N Winfield RdWinfield, IL 60190-1222 · (630) 653-0848 · Fax (630) 653-7746
Fax(630) 653-7746
Sole ProprietorNo
Medical School CMSLoyola University Of Chicago, Stritch School Of MedicineGraduated 2004
Enumeration DateMay 6, 2008
Last NPPES UpdateApril 15, 2013
NPI 1790951093 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License Licensed in IL · 036116854
Definition

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

Also ListedPediatricsTaxonomy 208000000X · License 036116854 (IL)
25 N WINFIELD RD, Winfield, IL 60190

Other Identifiers 7

Other363149833IL · Tax Identification Number
Other3631498336019001IL · Cdpg Hfs Payee Id
Medicare PINK53640IL
Medicaid036116854IL
Other487450IL · Medicare Group Number
Other0222075IL · Blue Cross Group Number
OtherP00659358IL · Medicare Railroad

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

Enrolled in Medicare and accepts Medicare assignment

Dr. Mary Michael Westerholm M.d. 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 ID4880752609
PECOS Enrollment IDI20081023000375
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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60190 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
$137.43 typical visit price
range $59.81 – $181.38
Typical copayment $34.35 (range $14.95 – $45.34)
Most-billed visit code 99204
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.

Surgery
25 N WINFIELD RD, STE 410
WINFIELD, IL 60190
Surgery
25 N WINFIELD RD, STE 410
WINFIELD, IL 60190
Internal Medicine (Cardiovascular Disease)
25 N WINFIELD RD, STE 300
WINFIELD, IL 60190
Internal Medicine (Cardiovascular Disease)
25 N WINFIELD RD, STE 300
WINFIELD, IL 60190
Urology
25 N WINFIELD RD, STE 405
WINFIELD, IL 60190
Pediatrics
25 N WINFIELD RD
WINFIELD, IL 60190
Internal Medicine (Clinical Cardiac Electrophysiology)
25 N WINFIELD RD, STE 300
WINFIELD, IL 60190
Emergency Medicine
25 N WINFIELD RD
WINFIELD, IL 60190

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 Westerholm's NPI number?

The NPI number for Mary Westerholm is 1790951093. It was assigned to this individual provider in the NPPES registry on May 6, 2008.

Where is Mary Westerholm located?

Mary Westerholm practices at 25 N Winfield Rd, Winfield, IL 60190. The listed phone number is (630) 653-0848.

What is Mary Westerholm's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Mary Westerholm enrolled in Medicare?

Yes. Mary Westerholm 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.

When was this NPI record last updated?

The NPPES record for Mary Westerholm was last updated on April 15, 2013. NPI Profile syncs with the weekly NPPES data releases published by CMS.