Individual Healthcare Provider
William Tillis
Provider's NPPES record last updated: September 14, 2023
Overview
- Entity Type
- Individual Healthcare Provider
- NPI
- 1669468377
- Primary Specialty
- Internal Medicine — Pulmonary Disease
- Practice Location
- Lake Geneva, Wisconsin
- 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 20, 2026, 11:58 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
Internal Medicine
Pulmonary Disease
Allopathic & Osteopathic Physicians
An internist who treats diseases of the lungs and airways. The pulmonologist diagnoses and treats cancer, pneumonia, pleurisy, asthma, occupational and environmental diseases, bronchitis, sleep disorders, emphysema and other complex disorders of the lungs.
Taxonomy code 207RP1001X
Provider-Reported License Information
- Internal Medicine (Wisconsin)
- 81911-20
- Internal Medicine (South Carolina)
- 83330
- Internal Medicine (Illinois)
- 036085931
Practice Locations
Practice Location
N2950 State Road 67
Lake Geneva, Wisconsin 53147-2655
Phone: (262) 245-0535
Additional Practice Location
1 Richland Medical Park Dr Ste 300
Columbia, South Carolina 29203-6831
Phone: (803) 545-5500
Fax: (803) 933-3022
Additional Practice Location
1001 Main St
Suite 200
Peoria, Illinois 61606-1907
Phone: (309) 672-5682
Fax: (309) 672-3147
Additional Practice Location
1000 Mineral Point Ave
Janesville, Wisconsin 53548-2982
Phone: (608) 756-6868
Fax: (608) 756-6289
Additional Practice Location
903 Mineral Point Ave
Janesville, Wisconsin 53548-2970
Phone: (608) 752-6255
Fax: (608) 752-6253
Record Information
- Enumeration Date
- September 27, 2005
- Provider's NPPES Record Last Updated
- September 14, 2023
- Certification Date
- September 14, 2023
- NPISignal NPPES Dataset
- August 2026
See Something Wrong?
Incorrect provider information
Everything on this page comes directly from the NPPES data CMS publishes. NPISignal cannot edit a provider's record — only the provider or organization can, directly through NPPES.
Update a record through NPPESSomething wrong with this page?
If NPISignal is displaying this data incorrectly — a formatting error, a broken link, a mismatch with the source file — let us know.
Report a display issue