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DR. FREAGER SINCLAIR WILLIAMS M.D.
NPI 1528103207
Obstetrics & Gynecology in Oakbrook Terrace, IL

Active since February 21, 2007PECOS EnrolledAccepts Medicare Assignment
17W740 22ND ST, OAKBROOK TERRACE, IL 60181(630) 627-7162 Get Directions Write a Review

NPPES record last updated: May 5, 2021. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Dr. Freager Sinclair Williams M.d. NPPES

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

DR. FREAGER SINCLAIR WILLIAMS M.D. (NPI 1528103207) is an individual obstetrics & gynecology provider in Oakbrook Terrace, Illinois, licensed in Illinois (036-107930) and active in the NPI registry since February 2007. He is enrolled in Medicare PECOS, is affiliated with Loyola University Medical Center, and is a graduate of New York University Medical College - Nlg (1996).

NPPES Registry Identity

NPI1528103207
Entity TypeIndividualMale
Primary Taxonomy207V00000X
Provider Legal NameDR. FREAGER SINCLAIR WILLIAMSCredential: M.D.
Location Address17W740 22ND STOakbrook Terrace, IL 60181-4402
Mailing Address17w740 22nd StOakbrook Terrace, IL 60181-4402 · (630) 627-7162
Phone(630) 627-7162
Sole ProprietorNo
Medical School CMSNew York University Medical College - NlgGraduated 1996
Enumeration DateFebruary 21, 2007
Last NPPES UpdateMay 5, 2021
NPPES CertifiedMay 5, 2021
✔ NPI 1528103207 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207V00000X
License✔ Licensed in IL · 036-107930
Definition
An obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproductive system and associated disorders. This physician serves as a consultant to other physicians and as a primary physician for women.
17W740 22ND ST, Oakbrook Terrace, IL 60181
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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. Freager Sinclair Williams 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 ID3678645348
PECOS Enrollment IDI20080712000136
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.

Hospital Affiliations CMS Care Compare

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

Loyola University Medical Center

Acute Care Hospitals · Maywood, IL
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140276
Location2160 S 1st AvenueMaywood, IL 60153 · Cook County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60181 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
$74.38 typical visit price
range $19.15 – $147.12
Typical copayment $18.59 (range $4.78 – $36.78)
Most-billed visit code 99213
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 2

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

JORGE ASCONAPE MD
Psychiatry & Neurology (Neurology)
17W740 22ND ST, 2160 S. FIRST AVENUE, MAYWOOD, IL 60153
OAKBROOK TERRACE, IL 60181
Dupage County (630) 627-7399
DR. SARAH ANN WAGNER M.D.
Obstetrics & Gynecology
17W740 22ND ST
OAKBROOK TERRACE, IL 60181
Dupage County (630) 627-7248

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 Freager Williams's NPI number?

The NPI number for Freager Williams is 1528103207. It was assigned to this individual provider in the NPPES registry on February 21, 2007.

Where is Freager Williams located?

Freager Williams practices at 17w740 22nd St, Oakbrook Terrace, IL 60181. The listed phone number is (630) 627-7162.

What is Freager Williams's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.

Is Freager Williams enrolled in Medicare?

Yes. Freager Williams 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.

Is Freager Williams affiliated with any hospitals?

According to CMS data, Freager Williams is affiliated with Loyola University Medical Center.

When was this NPI record last updated?

The NPPES record for Freager Williams was last updated on May 5, 2021. NPI Profile syncs with the weekly NPPES data releases published by CMS.