Sean Thomas Williams, MD - Medicare Emergency Medicine in Chicago, IL

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Sean Thomas Williams, MD is a medicare enrolled "Emergency Medicine" physician in Chicago, Illinois. He went to University Of Illinois College Of Med (chi/peor/rock/chm-urb) and graduated in 2015 and has 9 years of diverse experience with area of expertise as Emergency Medicine. He is a member of the group practice Presence Healthcare Services and his current practice location is 5645 W Addison St, Dept Of Emergency Medicine, Chicago, Illinois. You can reach out to his office (for appointments etc.) via phone at (773) 794-8383.

Sean Thomas Williams is licensed to practice in Illinois (license number 036144052) and he also participates in the medicare program. He accepts medicare assignments (which means he accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and his NPI Number is 1255712626.

Contact Information

Sean Thomas Williams, MD
5645 W Addison St, Dept Of Emergency Medicine,
Chicago, IL 60634-4403
(773) 794-8383
(773) 794-4686

Map and Direction




Physician's Profile

Full NameSean Thomas Williams
GenderMale
SpecialityEmergency Medicine
Experience9 Years
Location5645 W Addison St, Chicago, Illinois
Accepts Medicare AssignmentsYes. He accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Sean Thomas Williams attended and graduated from University Of Illinois College Of Med (chi/peor/rock/chm-urb) in 2015
  NPI Data:
  • NPI Number: 1255712626
  • Provider Enumeration Date: 06/11/2015
  • Last Update Date: 03/18/2021
  Medicare PECOS Information:
  • PECOS PAC ID: 2769786003
  • Enrollment ID: I20180503000502

Medical Identifiers

Medical identifiers for Sean Thomas Williams such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1255712626NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207P00000XEmergency Medicine 036144052 (Illinois)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Community First Medical CenterChicago, ILHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Presence Healthcare Services2860396769317

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Sean Thomas Williams allows following entities to bill medicare on his behalf.
Entity NamePresence Healthcare Services
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1932216819
PECOS PAC ID: 2860396769
Enrollment ID: O20050215000965
Entity NameCepamerica Illinois Llp
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1912283110
PECOS PAC ID: 3274793633
Enrollment ID: O20120322000587
Entity NameCommunity First Healthcare Of Illinois Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1881059897
PECOS PAC ID: 2860716685
Enrollment ID: O20160104001552

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Sean Thomas Williams is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Sean Thomas Williams, MD
5645 W Addison St, Dept Of Emergency Medicine,
Chicago, IL 60634-4403

Ph: () -		Sean Thomas Williams, MD
5645 W Addison St, Dept Of Emergency Medicine,
Chicago, IL 60634-4403

Ph: (773) 794-8383

Reviews and Comments


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Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

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