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Internal Medicine

Holly A. Leider, MD

Works at hospitals in Grafton, WI · Milwaukee, WI · Wisconsin

Summary

Holly A. Leider, MD (Internal Medicine) is listed by Medicare at 2 hospitals in Grafton, WI and Milwaukee, WI. NPI 1720014053. Source: CMS Facility Affiliation Data, updated 2026-10-02.

From official Medicare data

This page shows what Medicare's official clinician data says about Holly A. Leider, joined by NPI number (data updated 2026-10-02). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

At a glance

Internal MedicinePrimary specialty
May acceptAccepts Medicare assignment
29Years since medical school (graduated 1997)
Medical College Of WisconsinMedical school
FemaleGender (as listed)
Aurora Advanced Healthcare, Inc.Group practice (+1 more)

Quick answers

Which hospitals does Holly A. Leider work at?
Medicare's official clinician data lists Holly A. Leider at 2 hospitals: Aurora Medical Center and Aurora St Lukes Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
Where does Holly A. Leider see patients?
Medicare's clinician data lists 2 practice locations, including Kenosha, WI and Milwaukee, WI. Call before your visit to confirm the address.
What is Holly A. Leider's specialty?
Medicare lists Internal Medicine as the primary specialty.
Does Holly A. Leider accept Medicare assignment?
Medicare's clinician data says Holly A. Leider may accept Medicare assignment (as of 2026-10-02). Ask the office whether they accept it for your visit.
What is the phone number for Holly A. Leider?
(262) 948-7000, as listed in official Medicare / NPI Registry data.
What is Holly A. Leider's NPI number?
1720014053. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Hospitals where Holly A. Leider works

Medicare's Facility Affiliation Data lists Holly A. Leider at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.

Practice locations

Addresses where Holly A. Leider is enrolled with Medicare (CMS data updated 2026-10-02).

Group practices

Medicare enrollment lists Holly A. Leider as a member of these groups (CMS data updated 2026-10-02).

  • Aurora Advanced Healthcare, Inc.1,124 clinicians in the group
  • Aamg Reach PLLC51 clinicians in the group

Specialties

Find other Internal Medicine doctors in Wisconsin →

Other internal medicine doctors in Kenosha

Clinicians with the same Medicare primary specialty in Kenosha, WI — not a recommendation.

All internal medicine doctors in Kenosha →

Clinician information

CredentialMD
Medical schoolMedical College Of Wisconsin
Graduation year1997
Gender (as listed)Female
Medicare assignmentMay accept for some services
NPI (National Provider Identifier)1720014053
CorrectionsReport an error or suggest an update →

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

  1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
  2. National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
  3. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  4. Medicare Care Compare — official Medicare tool to look up clinicians