SEAN THOMAS WILLIAMS M.D.
NPI 1255712626
Emergency Medicine in Chicago, IL

Q: What is Sean Williams's NPI number?

The NPI number for Sean Williams is 1255712626. It was assigned to this individual provider in the NPPES registry on June 11, 2015.

Q: What is Sean Williams's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Sean Williams was last updated on March 18, 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 June 11, 2015PECOS Enrolled

5645 W ADDISON ST, DEPT OF EMERGENCY MEDICINE, CHICAGO, IL 60634(773) 794-8383(773) 794-4686 Get Directions Write a Review

NPPES record last updated: March 18, 2021. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Mar 18, 2021, Oct 10, 2018, Apr 17, 2018 (3 updates tracked since 2018).

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About Sean Thomas Williams M.d. NPPES

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

SEAN THOMAS WILLIAMS M.D. (NPI 1255712626) is an individual emergency medicine provider in Chicago, Illinois, licensed in Illinois (036144052) and active in the NPI registry since June 2015. He is enrolled in Medicare PECOS and maintains a secondary practice location in Chicago.

NPPES Registry Identity

NPI1255712626

Entity TypeIndividualMale

Primary Taxonomy207P00000X

Provider Legal NameSEAN THOMAS WILLIAMSCredential: M.D.

Location Address5645 W ADDISON ST, DEPT OF EMERGENCY MEDICINEChicago, IL 60634-4403

Mailing Address5645 W Addison St, Dept Of Emergency MedicineChicago, IL 60634-4403

Phone(773) 794-8383

Fax(773) 794-4686

Sole ProprietorNo

Enumeration DateJune 11, 2015

Last NPPES UpdateMarch 18, 20213 updates tracked since enumeration

NPPES CertifiedMarch 18, 2021

✔ NPI 1255712626 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207P00000X

License✔ Licensed in IL · 036144052

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.

5645 W ADDISON ST, Chicago, IL 60634

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Secondary Practice Location 1

Location 17435 W Talcott AveChicago, IL 60631-3707 · Phone (773) 774-8000

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Sean Thomas Williams 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.

Areas of Expertise CMS Part B claims 2

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.

19 services19 patients

Electrocardiogram (ecg) 1 to 3 leads with review by physician only 93042

An Electrocardiogram (ECG) is a non-invasive test that records the electrical activity of your heart. 1 to 3 leads or sensors are placed on your body to capture this data. A physician then reviews the results to evaluate your heart's health.

14 services14 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60634 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

$94.06 typical visit price

range $60.08 – $183.39

Typical copayment $23.51 (range $15.02 – $45.84)

Most-billed visit code 99203

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.

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. AARON DANIEL KALLSNICK M.D.

Anesthesiology