Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Zachary P Allegretti, MD

Individual provider Family Medicine Physician · NPI 1952807554

Zachary P Allegretti, MD is registered under Family Practice in Lake Geneva, Wisconsin. Qualified in 2018, 8 years ago. Practices with Aurora Medical Group, Inc, a 3,741-clinician group and accepts Medicare assignment. Licensed in South Carolina and Wisconsin.

Years since qualifying
8
Licensed in
SC, WI
In the registry since
2018
Specialties on file
2
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

146 E Geneva Sq
Lake Geneva, WI 53147-9694
Phone: (262) 249-5000
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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 75016 (WI)
Family Medicine Physician Taxonomy 207Q00000X · Licence 52613 (SC)

Record details

NPI number1952807554
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 3, 2018
Last updated in NPPESNovember 18, 2021
Certification dateNovember 18, 2021

Medicare enrollment

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

Medicare specialtyFAMILY PRACTICE
Medical schoolOTHER
Graduated 2018 (8 years in practice)
Group practice Aurora Medical Group, Inc. — 3741 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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 patients325
Services billed 1,604 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

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 Lakeland Medical Center Hospital · Elkhorn, WI
  • Aurora St Lukes Medical Center Hospital · Milwaukee, WI · listed as Aurora St Luke's Medical Center
  • Aurora Memorial Hospital Burlington Hospital · Burlington, WI
  • Aurora At Home Home health agency · Milwaukee, WI
  • Aurora At Home Hospice · Wauwatosa, WI

Colleagues at Aurora Medical Group, Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 3741 clinicians in the practice; 12 are shown here.

Other providers in Lake Geneva