Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Joseph A. Nicholas, MD

Individual provider Family Medicine Physician · NPI 1528094588

Joseph A. Nicholas, MD is registered under Family Practice in Greenfield, Wisconsin. Graduated from University of Iowa, Rj & L Carver College of Medicine in 2003, 23 years ago. Practices with Lakeshore Medical Clinic LLC, a 379-clinician group and accepts Medicare assignment. Licensed in Wisconsin.

Years since qualifying
23
Trained at
University of Iowa, Rj & L Carver College of Medicine
Licensed in
WI
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

4448 W Loomis Rd Ste 100
Greenfield, WI 53220-4851
Phone: (414) 281-5150
Fax: (414) 281-5767
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence 49329-020 (WI)

Record details

NPI number1528094588
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 23, 2006
Last updated in NPPESJune 25, 2025
Certification dateJune 25, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyFAMILY PRACTICE
Medical schoolUNIVERSITY OF IOWA, RJ & L CARVER COLLEGE OF MEDICINE
Graduated 2003 (23 years in practice)
Group practice Lakeshore Medical Clinic Llc — 379 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients216
Services billed 986 a service is one billed item, such as a visit, a test or a procedure
Average patient age71

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

  • Aurora St Lukes Medical Center Hospital · Milwaukee, WI · listed as Aurora St Luke's Medical Center
  • West Allis Memorial Hospital Hospital · West Allis, WI · listed as West Allis Memorial Hospital, Inc
  • Aurora At Home Home health agency · Milwaukee, WI
  • Aurora At Home Hospice · Wauwatosa, WI

Colleagues at Lakeshore Medical Clinic LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 379 clinicians in the practice; 12 are shown here.

Other providers in Greenfield