Individual Healthcare Provider
John Ellis Williamson, D.O.
Provider's NPPES record last updated: September 27, 2023
Overview
- Entity Type
- Individual Healthcare Provider
- NPI
- 1629017108
- Primary Specialty
- Emergency Medicine — Emergency Medical Services
- Practice Location
- Morris, Illinois
- Sole Proprietor
- No
Federal Screening
NPISignal checked this NPI against federal exclusion sources. Results below are based on the NPI number itself — an identifier match, not a name match.
List of Excluded Individuals/Entities (LEIE)
HHS Office of Inspector General
No potential match was identified in NPISignal's indexed List of Excluded Individuals/Entities (LEIE) records as of 2026-09-10.
- Source data
- September 10, 2026
- Records indexed
- 84,001
- Screened
- Sep 21, 2026, 5:52 PM UTC
This reflects only the records NPISignal currently holds and the identity information supplied. It is not a verification of eligibility, licensure, or compliance. Verify decisions that matter against the authoritative source.
SAM.gov Exclusions
U.S. General Services Administration
SAM.gov Exclusions was not checked.
SAM.gov screening is not configured on this deployment. No SAM check has been performed.
- Screened
- Not checked
This is an NPI-based check only. NPISignal does not publish name-based exclusion matches on a provider profile. A shared or similar name is a lead that requires human review, not an identification, and this page is not the place to make one. Run a name-based screening below to see potential matches with the reasons for each.
This reflects only the records NPISignal currently holds and the identity information supplied. It is not a verification of eligibility, licensure, or compliance. Verify decisions that matter against the authoritative source.
Searches OIG LEIE and SAM.gov by name and reviews every potential match.
Specialties & Taxonomies
- Primary
Emergency Medicine
Emergency Medical Services
Allopathic & Osteopathic Physicians
An emergency medicine physician who specializes in non-hospital based emergency medical services (e.g., disaster site, accident scene, transport vehicle, etc.) to provide pre-hospital assessment, treatment, and transport patients.
Taxonomy code 207PE0004X Emergency Medicine
Allopathic & Osteopathic Physicians
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.
Taxonomy code 207P00000X
Provider-Reported License Information
- Emergency Medicine (Illinois)
- 036-109152
- Emergency Medicine (Illinois)
- 036109152
Practice Locations
Practice Location
150 W High St
Morris, Illinois 60450-1463
Phone: (815) 942-2932
Additional Practice Location
2 S Hospital Dr
Murphysboro, Illinois 62966-3333
Phone: (618) 684-3156
Additional Practice Location
405 W Jackson St
Carbondale, Illinois 62901-1462
Phone: (618) 549-0721
Additional Practice Location
201 S 14th St
Herrin, Illinois 62948-3631
Phone: (618) 942-2171
Additional Practice Location
1000 Health Center Dr
Mattoon, Illinois 61938-4644
Phone: (217) 258-2551
Fax: (217) 258-2256
Record Information
- Enumeration Date
- June 6, 2006
- Provider's NPPES Record Last Updated
- September 27, 2023
- Certification Date
- September 27, 2023
- NPISignal NPPES Dataset
- August 2026
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