Doctor profile · Federal record
Dr. William Tillis
Pulmonary Disease Physician (CMS: Pulmonary Disease) · Pulmonary Disease Physician · Pulmonary Disease Physician · Lake Geneva, WI
- NPI 1669468377
- Accepts Medicare
- MIPS 94.4 / 100 · 2023
- 40 yrs in practice
- Licensed in 3 states
- Male
- Group practice
- No sanctions
Practice & contact
Operates at 5 locations .
- Primary practice
-
N2950 State Road 67
Lake Geneva, WI 531472655
(262) 245-0535
fax (262) 245-2248 - Additional location
-
1000 Mineral Point Ave
Janesville, WI 535482982
(608) 756-6868
fax (608) 756-6289 - Additional location
-
903 Mineral Point Ave
Janesville, WI 535482970
(608) 752-6255
fax (608) 752-6253 - Additional location
-
1 Richland Medical Park Dr Ste 300
Columbia, SC 292036831
(803) 545-5500
fax (803) 933-3022 - Additional location
-
1001 Main St, Suite 200
Peoria, IL 616061907
(309) 672-5682
fax (309) 672-3147
Show 2 more locations
Credentials & registration
- NPI registered
- September 2005 — 21 yrs on file
- Profile last updated
- September 14, 2023
- Year of graduation
- 1986 — 40 yrs since
- Specialty taxonomy
- 207RP1001X — NUCC code
- State licenses (3)
- Wisconsin #81911-20 · South Carolina #83330 · Illinois #036085931
- Medicaid (2)
- IL #036085931 · SC #833307
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1669468377. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
178
Distinct HCPCS
8
Medicare allowed
$11,341
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 53 | 23 | $76 | |
94729 |
Test to examine how well the lungs exchange gases | 25 | 25 | $8 | |
94060 |
Test to measure expiratory airflow and volume changes before and after medication administration | 22 | 22 | $9 | |
94726 |
Test to determine lung volumes using sensors | 22 | 22 | $10 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 21 | 21 | $105 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 12 | 12 | $125 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 12 | 12 | $167 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 11 | 11 | $86 |
In context: peer comparison
Among 1 peers in this city , average services per provider: 22. This provider delivers 8.1× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
318
Patients
108
Total drug cost
$77,032
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Azelastine Hcl | Generic | 54 | 37 | $2,491 |
| Fluticasone Propionate | Generic | 52 | 39 | $1,052 |
| Albuterol Sulfate Hfa (Albuterol Sulfate) | Brand | 40 | 18 | $1,663 |
| Prednisone | Generic | 39 | 14 | $334 |
| Montelukast Sodium | Generic | 21 | 0 | $328 |
| Spiriva Respimat (Tiotropium Bromide) | Brand | 19 | 0 | $12,151 |
| Trelegy Ellipta (Fluticasone/Umeclidin/Vilanter) | Brand | 18 | 0 | $19,445 |
| Symbicort (Budesonide/Formoterol Fumarate) | Brand | 17 | 0 | $9,456 |
| Anoro Ellipta (Umeclidinium Brm/Vilanterol Tr) | Brand | 16 | 0 | $8,090 |
| Breo Ellipta (Fluticasone/Vilanterol) | Brand | 16 | 0 | $9,376 |
Frequently asked questions
What is Dr. William Tillis's medical specialty?
Dr. William Tillis practices Pulmonary Disease Physician in Lake Geneva, WI.
Where does Dr. William Tillis practice?
Dr. William Tillis practices at N2950 State Road 67, Lake Geneva, WI 531472655. Office phone: 2622450535.
What is Dr. William Tillis's NPI?
Dr. William Tillis's National Provider Identifier (NPI) is 1669468377, issued by NPPES.
Does Dr. William Tillis accept Medicare assignment?
Yes. Dr. William Tillis accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. William Tillis commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232); Test to examine how well the lungs exchange gases (HCPCS 94729); Test to measure expiratory airflow and volume changes before and after medication administration (HCPCS 94060). Source: CMS Medicare Physician & Other Practitioners file.