Dan E. Williams, PA, PSYD
Medical Physician Assistant · Janesville, WI
Dan E. Williams, PA, PSYD is a medical physician assistant with a practice address in Janesville, Wisconsin, and NPI 1801874664, issued on Jan 3, 2006. Check the license (Wisconsin 3873-23, as entered in NPPES) with the Wisconsin board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Dan E. Williams
- Credential
- PA, PSYD
- Primary taxonomy
- Medical Physician Assistant 363AM0700X
- License numbers
- 3873-23 WI
8500535 IL
Self-reported in NPPES; status is on the state search - Practice location
- 3524 E Milwaukee St, Janesville, WI 53546
- Phone
- (608) 756-7100
- Enumerated
- Jan 3, 2006
- Record last updated
- Oct 26, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (608) 756-4700
- Medicaid ID
- 1801874664 WI
- Medicare enrollment
- Enrolled (PECOS I20040322000591); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest medical physician assistant records → All 687 in Wisconsin → Look up another NPI →
Also registered at 3524 E Milwaukee St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Mary Augustian, MDPediatrics Physician1295259513
- Hamid Bashir, MDRheumatology Physician1225257694
- Ryndon Bautista, M.D.Internal Medicine Physician1225230170
Verify Dan E. Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Wisconsin board licenses this profession
Search for license 3873-23Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
39% fewer Medicare Part D claims than the average medical physician assistant in 2024
696 Medicare Part D claims for 442 beneficiaries, against an average of 1,148 among the 23,801 providers of this specialty who prescribed in Part D. 26 claims were for opioids.
Most prescribed
- Prednisone190 claims
- Cephalexin70 claims
- Nitrofurantoin Mono-Macro62 claims
- Doxycycline Hyclate59 claims
- Azithromycin37 claims
- Tramadol Hcl23 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.
Bills Medicare through one group practice
- Physicians Immediate Care North Chicago LLCFreeport, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Dan E. Williams among 687 medical physician assistant records in Wisconsin
Dan E. Williams, PA, PSYD is one of 687 medical physician assistant records with a practice address in Wisconsin. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 8% of them.
- NPI issued2006 · 8% of these records are older, 72% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated1981 · median 2016 among the 479 with a school on file
- Record last updated2016 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363AM0700X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Medical Physician Assistant providers in Wisconsin
There are 687 medical physician assistant records in Wisconsin.
All 687 in Wisconsin → Every provider in Janesville → Medical Physician Assistant nationwide →
The 8 medical physician assistant records with the nearest ZIP codes
- Brittany Austin, PA-CJanesville, WI 535461013226968
- Tina Schnell, PA-CJanesville, WI 535461275698300
- Karlee Wilgenbusch, PAJanesville, WI 535461891384848
- James Fitzgibbon, PA CJanesville, WI 535481659340032
- Brett Haarmann, PA-CJanesville, WI 535481811909302
- Ann Holt-Minard, PA-CJanesville, WI 535481316094535
- Christian Jensen, PA-CJanesville, WI 535481336212463
- Jennifer Laatsch, PA-CJanesville, WI 535481306912688
Common questions
What is Dan E. Williams, PA, PSYD's NPI number?
Dan E. Williams, PA, PSYD's National Provider Identifier (NPI) is 1801874664, issued on Jan 3, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Dan E. Williams, PA, PSYD located?
The NPPES record lists a practice address at 3524 E Milwaukee St, Janesville, WI, 53546. Phone: (608) 756-7100. Providers update this record themselves, so call before visiting.
How can I verify Dan E. Williams, PA, PSYD's license?
NPPES lists Wisconsin license number 3873-23, as entered by the provider. Search the Wisconsin board that licenses this profession; the NPPES record confirms identity only.
How much does Dan E. Williams, PA, PSYD prescribe under Medicare Part D?
In 2024, Dan E. Williams, PA, PSYD had 696 Medicare Part D claims for 442 beneficiaries; the average among medical physician assistant prescribers was 1,148. Part D covers Medicare prescriptions only.
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.