William Tillis
NPI 1669468377 · Pulmonary Disease Physician · Lake Geneva, WI
Enrolled with Medicare as Practitioner - Pulmonary Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Tillis is a Pulmonary Disease Physician provider in Lake Geneva, WI (NPI 1669468377).
Provider details
- NPI number
- 1669468377
- Entity type
- Individual
- Primary specialty
- Pulmonary Disease PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- No
- License
- 83330 (SC)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
5 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
351 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 67 | $93 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 61 | $61 |
| Test to Measure Expiratory Airflow and Volume Changes Before and After Medication Administration94060 | 59 | $10 |
| Test to Examine How Well the Lungs Exchange Gases94729 | 53 | $9 |
| Test to Determine Lung Volumes Using Sensors94726 | 49 | $12 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 28 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Fluticasone Propionate | 437 | 194 |
| Azelastine Hcl | 425 | 209 |
| Fluticasone/Umeclidin/Vilanterbrand: Trelegy Ellipta | 193 | 45 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 162 | 74 |
| Tiotropium Br/Olodaterol Hclbrand: Stiolto Respimat | 157 | 35 |
| Fluticasone Propion/Salmeterolbrand: Fluticasone-Salmeterol | 138 | 58 |
Practice location
Mailing address
Additional practice locations (4)
- 1001 Main StSuite 200Peoria, IL 61606-1907Phone: (309) 672-5682Fax: (309) 672-3147
- 1 Richland Medical Park Dr Ste 300Columbia, SC 29203-6831Phone: (803) 545-5500Fax: (803) 933-3022
- 1000 Mineral Point AveJanesville, WI 53548-2982Phone: (608) 756-6868Fax: (608) 756-6289
- 903 Mineral Point AveJanesville, WI 53548-2970Phone: (608) 752-6255Fax: (608) 752-6253
Registry dates
- Enumerated
- 2005-09-27
- Last updated
- 2023-09-14
- Certified
- 2023-09-14
Frequently asked questions
- What is William Tillis's NPI number?
- William Tillis's National Provider Identifier (NPI) is 1669468377, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Tillis's specialty?
- William Tillis is listed in the NPPES registry with a primary specialty of Pulmonary Disease Physician (Allopathic & Osteopathic Physicians).
- Where is William Tillis located?
- William Tillis's practice location on file with NPPES is N2950 State Road 67, Lake Geneva, WI 53147-2655.
- What is William Tillis's phone number?
- The practice phone number listed in the NPPES registry for William Tillis is (262) 245-0535.
- Does William Tillis accept Medicare?
- William Tillis is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Tillis's NPI active?
- Yes — William Tillis's NPI (1669468377) is active in the NPPES registry as of the last update on 2023-09-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.