William Tillis
Pulmonary Disease Physician · Lake Geneva, WI
William Tillis is a pulmonary disease physician with a practice address in Lake Geneva, Wisconsin, and NPI 1669468377, issued on Sep 27, 2005. Check the license (Wisconsin 81911-20, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- William Tillis
- Primary taxonomy
- Pulmonary Disease Physician 207RP1001X
- License numbers
- 81911-20 WI
036085931 IL
83330 SC
Self-reported in NPPES; status is on the state search - Practice location
- N2950 State Road 67, Lake Geneva, WI 53147
- Phone
- (262) 245-0535
- Enumerated
- Sep 27, 2005
- Record last updated
- Sep 14, 2023
- Fax
- (262) 245-2248
- Medicaid IDs
- 036085931 IL
833307 SC - Medicare enrollment
- Enrolled (PECOS I20230913001846); accepts Medicare assignment
- Medical or professional school
- University Of Illinois College Of Med (Chi/Peor/Rock/Chm-Urb), 1986
- Entity
- Type 1 · individual
8 nearest pulmonary disease physician records → All 300 in Wisconsin → Look up another NPI →
Also registered at N2950 State Road 67
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mary Anderson, MDObstetrics & Gynecology Physician1487662060
- Anshul Bamrolia, MDHematology & Oncology Physician1942361662
- Hamik Biramian, DOEmergency Medicine Physician1689817488
- Andrea Boeckman, MDObstetrics & Gynecology Physician1194882514
- Ashley Boro, OTOccupational Therapist1013421908
- Kenneth Bortin, MDCardiovascular Disease Physician1861554743
Verify William Tillis in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 81911-20Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
82% more Medicare Part D claims than the average pulmonary disease physician in 2024
2,594 Medicare Part D claims for 409 beneficiaries, against an average of 1,425 among the 11,596 providers of this specialty who prescribed in Part D. Brand-name drugs were 43% of claims.
Most prescribed
- Fluticasone Propionate437 claims
- Azelastine Hcl425 claims
- Trelegy Ellipta193 claims
- Albuterol Sulfate Hfa162 claims
- Stiolto Respimat157 claims
- Fluticasone-Salmeterol138 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The MIPS final score for 2023 (Medicare payment program): 97.3 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Mercy Health System CorporationLake Geneva, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Tillis among 300 pulmonary disease physician records in Wisconsin
William Tillis is one of 300 pulmonary disease physician records with a practice address in Wisconsin. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 95% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 73% of these records are
- Graduated1986 · median 2003 among the 220 with a school on file
- Record last updated2023 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RP1001X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Pulmonary Disease Physician providers in Wisconsin
There are 300 pulmonary disease physician records in Wisconsin.
All 300 in Wisconsin → Every provider in Lake Geneva → Pulmonary Disease Physician nationwide →
The 8 pulmonary disease physician records with the nearest ZIP codes
- Joshua Bloom, MDKenosha, WI 531431770530750
- Alfred Habel, MDKenosha, WI 531431760439608
- Peter Mariani, MDKenosha, WI 531431679520514
- Hasnain Bawaadam, M.D., M.P.H.Kenosha, WI 531421861618597
- Sushant Nanavati, M.D.Kenosha, WI 531421821449182
- Joel Niebuhr, D.O.Kenosha, WI 531421902015167
- Srikanth Davuluri, MDPleasant Prairie, WI 531581205034998
- Tricia Griffiths, M.D.Pleasant Prairie, WI 531581174938740
Common questions
What is William Tillis's NPI number?
William Tillis's National Provider Identifier (NPI) is 1669468377, issued on Sep 27, 2005. An NPI identifies a provider in billing; it is not a license.
Where is William Tillis located?
The NPPES record lists a practice address at N2950 State Road 67, Lake Geneva, WI, 53147. Phone: (262) 245-0535. Providers update this record themselves, so call before visiting.
How can I verify William Tillis's license?
NPPES lists Wisconsin license number 81911-20, as entered by the provider. Search the Wisconsin Medical Examining Board at https://dsps.wi.gov/Pages/BoardsCouncils/MEB/Default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William Tillis prescribe under Medicare Part D?
In 2024, William Tillis had 2,594 Medicare Part D claims for 409 beneficiaries; the average among pulmonary disease physician prescribers was 1,425. Part D covers Medicare prescriptions only.
What is William Tillis's MIPS final score?
The 2023 MIPS final score is 97.3 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.