JEFFREY J WILLIAMS D.O.
NPI 1134328644
Obstetrics & Gynecology in New Lenox, IL

Q: What is Jeffrey Williams's NPI number?

The NPI number for Jeffrey Williams is 1134328644. It was assigned to this individual provider in the NPPES registry on July 13, 2007.

Q: What is Jeffrey Williams's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Jeffrey Williams was last updated on March 17, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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 July 13, 2007PECOS EnrolledAccepts Medicare Assignment

305 VINE ST, NEW LENOX, IL 60451(815) 463-4746(815) 463-4937 Get Directions Write a Review

NPPES record last updated: March 17, 2021. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Mar 17, 2021, Aug 18, 2020 (2 updates tracked since 2020).

On this page

About Jeffrey J Williams D.o. NPPES

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

JEFFREY J WILLIAMS D.O. (NPI 1134328644) is an individual obstetrics & gynecology provider in New Lenox, Illinois, licensed in Illinois (036117200) and active in the NPI registry since July 2007. He is enrolled in Medicare PECOS, maintains a secondary practice location in Olympia Fields, and is a graduate of Mid West Medical College (2003).

NPPES Registry Identity

NPI1134328644

Entity TypeIndividualMale

Primary Taxonomy207V00000X

Provider Legal NameJEFFREY J WILLIAMSCredential: D.O.

Location Address305 VINE STNew Lenox, IL 60451-1666

Mailing Address9223 W Saint Francis Rd, 2nd FloorFrankfort, IL 60423-8330 · (815) 806-3111 · Fax (815) 464-2621

Phone(815) 463-4746

Fax(815) 463-4937

Sole ProprietorYes

Medical School CMSMid West Medical CollegeGraduated 2003

Enumeration DateJuly 13, 2007

Last NPPES UpdateMarch 17, 20212 updates tracked since enumeration

NPPES CertifiedMarch 17, 2021

✔ NPI 1134328644 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 · 036117200

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.

305 VINE ST, New Lenox, IL 60451

Open in Google Maps ↗

Secondary Practice Location 1

Location 120201 Crawford AveOlympia Fields, IL 60461-1010 · Phone (708) 679-2160

Other Identifiers 1

Other036117200IL · License

Accepted Insurance

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

Jeffrey J Williams D.o. 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 ID7719078211

PECOS Enrollment IDI20070814000078, I20180430001447

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 Jeffrey Williams reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Will County Community Health Center

4.9 mi

Federally Qualified Health Center (FQHC)

1106 NEAL AVE
Joliet, IL 60433

Reassigned Medicare billing, Illinois enrollment
34 clinicians in this Medicare group

NPI 1902811714 (815) 727-8670

Specialty Physicians Of Illinois, LLC

9.0 mi

Urgent Care

20180 S LAGRANGE RD
Frankfort, IL 60423

Reassigned Medicare billing, Illinois enrollment
148 clinicians in this Medicare group

NPI 1962024612 (815) 464-2010

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60451 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

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

JOAN M COVAULT DO

Family Medicine

305 VINE ST
NEW LENOX, IL 60451

Will County (815) 485-2541

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 Jeffrey Williams's NPI number?

The NPI number for Jeffrey Williams is 1134328644. It was assigned to this individual provider in the NPPES registry on July 13, 2007.

Where is Jeffrey Williams located?

Jeffrey Williams practices at 305 Vine St, New Lenox, IL 60451. The listed phone number is (815) 463-4746.

What is Jeffrey Williams's specialty?

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

Is Jeffrey Williams enrolled in Medicare?

Yes. Jeffrey 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.

Which organizations bill Medicare for Jeffrey Williams's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Jeffrey Williams reassigns Medicare benefits to 2 organizations: Will County Community Health Center (Joliet, IL) and Specialty Physicians Of Illinois, LLC (Frankfort, 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 Jeffrey Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Jeffrey Williams accept?

Health plans from Ambetter Health and Ambetter Health of Delaware list Jeffrey Williams 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.

When was this NPI record last updated?

The NPPES record for Jeffrey Williams was last updated on March 17, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.