Doctor profile · Federal record
Dr. Dan Williams, PA, PSYD
Medical Physician Assistant (CMS: Physician Assistant) · Medical Physician Assistant · Janesville, WI
- NPI 1801874664
- Accepts Medicare
- 45 yrs in practice
- Licensed in 2 states
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
3524 E Milwaukee St
Janesville, WI 535461626
(608) 756-7100
fax (608) 756-4700
Credentials & registration
- NPI registered
- January 2006 — 20 yrs on file
- Profile last updated
- October 26, 2016
- Year of graduation
- 1981 — 45 yrs since
- Specialty taxonomy
- 363AM0700X — NUCC code
- State licenses (2)
- Wisconsin #3873-23 · Illinois #8500535
- Medicaid
- WI #1801874664
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1801874664. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
551
Distinct HCPCS
10
Medicare allowed
$35,590
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 203 | 158 | $74 | |
99203 |
New patient office or other outpatient visit, 30-44 minutes | 122 | 122 | $92 | |
87811 |
Detection test by immunoassay with direct visual observation for severe acute respiratory syndrome coronavirus 2 (covid-19) | 72 | 67 | $41 | |
81003 |
Automated urinalysis test | 38 | 35 | $2 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 25 | 24 | $104 | |
71046 |
X-ray of chest, 2 views | 24 | 24 | $9 | |
87880 |
Detection test by immunoassay with direct visual observation for streptococcus, group a (strep) | 21 | 21 | $16 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 21 | 21 | $137 | |
69209 |
Removal of impacted ear wax by washing | 14 | 13 | $15 | |
93000 |
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | 11 | 11 | $12 |
In context: peer comparison
Among 4 peers in this city , average services per provider: 146. This provider delivers 3.8× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
611
Patients
573
Total drug cost
$4,118
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Prednisone | Generic | 188 | 178 | $319 |
| Doxycycline Hyclate | Generic | 69 | 66 | $834 |
| Cephalexin | Generic | 53 | 49 | $321 |
| Nitrofurantoin Mono-Macro (Nitrofurantoin Monohyd/M-Cryst) | Brand | 52 | 46 | $459 |
| Amoxicillin | Generic | 38 | 38 | $161 |
| Ciprofloxacin Hcl | Generic | 33 | 32 | $148 |
| Tramadol Hcl | Generic | 30 | 29 | $67 |
| Azithromycin | Generic | 29 | 28 | $163 |
| Amoxicillin-Clavulanate Potass (Amoxicillin/Potassium Clav) | Brand | 26 | 26 | $196 |
| Clindamycin Hcl | Generic | 24 | 24 | $148 |
Frequently asked questions
What is Dr. Dan Williams's medical specialty?
Dr. Dan Williams practices Medical Physician Assistant in Janesville, WI.
Where does Dr. Dan Williams practice?
Dr. Dan Williams practices at 3524 E Milwaukee St, Janesville, WI 535461626. Office phone: 6087567100.
What is Dr. Dan Williams's NPI?
Dr. Dan Williams's National Provider Identifier (NPI) is 1801874664, issued by NPPES.
Does Dr. Dan Williams accept Medicare assignment?
Yes. Dr. Dan Williams accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Dan Williams commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99213); New patient office or other outpatient visit (HCPCS 99203); Detection test by immunoassay with direct visual observation for severe acute respiratory syndrome coronavirus 2 (covid-19) (HCPCS 87811). Source: CMS Medicare Physician & Other Practitioners file.