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Internal Medicine

Derek S. Turner, MD

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

Summary

Derek S. Turner, MD (Internal Medicine) is listed by Medicare at 2 hospitals in Racine, WI and Milwaukee, WI. NPI 1639189384. Medicare data says the clinician accepts Medicare assignment. Source: CMS Facility Affiliation Data, updated 2026-10-02.

From official Medicare data

This page shows what Medicare's official clinician data says about Derek S. Turner, 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
YesAccepts Medicare assignment
29Years since medical school (graduated 1997)
Loyola University Of Chicago, Stritch School Of MedicineMedical school
MaleGender (as listed)
Ascension Medical Group-Southeast Wisconsin IncGroup practice

Quick answers

Which hospitals does Derek S. Turner work at?
Medicare's official clinician data lists Derek S. Turner at 2 hospitals: Ascension All Saints Hospital and Ascension SE Wisconsin Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
Where does Derek S. Turner see patients?
Medicare's clinician data lists 1 practice location in Mount Pleasant, WI. Call before your visit to confirm the address.
What is Derek S. Turner's specialty?
Medicare lists Internal Medicine as the primary specialty.
Does Derek S. Turner accept Medicare assignment?
Yes. Medicare's clinician data says Derek S. Turner accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
What is the phone number for Derek S. Turner?
(262) 687-8300, as listed in official Medicare / NPI Registry data.
What is Derek S. Turner's NPI number?
1639189384. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Hospitals where Derek S. Turner works

Medicare's Facility Affiliation Data lists Derek S. Turner 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 Derek S. Turner is enrolled with Medicare (CMS data updated 2026-10-02).

Group practices

Medicare enrollment lists Derek S. Turner as a member of this group (CMS data updated 2026-10-02).

  • Ascension Medical Group-Southeast Wisconsin Inc545 clinicians in the group

Specialties

Find other Internal Medicine doctors in Wisconsin →

Other internal medicine doctors in Mount Pleasant

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

All internal medicine doctors in Mount Pleasant →

Clinician information

CredentialMD
Medical schoolLoyola University Of Chicago, Stritch School Of Medicine
Graduation year1997
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1639189384
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