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Emergency Medicine

Jessica N. Rezmer, DO

Works at hospitals in Racine, WI · Wisconsin

Summary

Dr. Jessica N. Rezmer, DO is an emergency medicine doctor at 17000 W N Ave, Brookfield, WI 53005. Phone: (262) 754-2220. Accepts Medicare assignment. In 2024, Jessica N. Rezmer had 331 Original Medicare patients and 565 services. NPI 1043482102. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

  • Specialty: Emergency medicine doctor (Medicare lists Emergency Medicine)
  • Address: 17000 W N Ave, Brookfield, WI 53005 · Directions
  • Phone: (262) 754‑2220
  • Medicare: Accepts Medicare assignment
  • Hospital: Ascension All Saints Hospital
  • Group practice: Emergency Medicine Specialists SC
  • Medical school: Midwestern University, Chicago College Of Osteopathic Med · graduated 2008 (18 years since medical school)
  • Gender (as listed): Female

From official Medicare data

This page shows what Medicare's official clinician data says about Jessica N. Rezmer, joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does Jessica N. Rezmer accept Medicare assignment?
Yes. Medicare's clinician data says Jessica N. Rezmer accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
How many Medicare patients does Jessica N. Rezmer see?
In 2024, CMS data shows 331 Original Medicare patients and 565 services for Jessica N. Rezmer. This counts Original Medicare only and measures volume, not quality.
What is Jessica N. Rezmer's NPI number?
1043482102. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Medicare activity in 2024

Official CMS public-use data for Jessica N. Rezmer, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Original Medicare patients331
Services billed to Medicare565
Different services or procedures20
Participating Medicare providerYes
Average age of these patients73

Most frequent services

  1. Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)216 services
  2. Emergency department visit with high level of medical decision making (99285)122 services
  3. Critical care, first 30-74 minutes (99291)122 services
  4. Emergency department visit with moderate level of medical decision making (99284)56 services
  5. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)29 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

  • High blood pressure75%
  • High cholesterol71%
  • Arthritis56%
  • Diabetes36%
  • Ischemic heart disease36%
  • Anxiety36%

Hospitals where Jessica N. Rezmer works

Medicare's Facility Affiliation Data lists Jessica N. Rezmer at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

  • Ascension All Saints HospitalRacine, WI · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 520096

Practice locations

Addresses where Jessica N. Rezmer is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Jessica N. Rezmer as a member of this group (CMS data updated October 2, 2026).

  • Emergency Medicine Specialists SC227 clinicians in the group

Specialties

Find other Emergency Medicine doctors in Wisconsin →

Other emergency medicine doctors in Brookfield

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

All emergency medicine doctors in Brookfield →

Other clinicians in Emergency Medicine Specialists SC

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

Clinician information

CredentialDO
Medical schoolMidwestern University, Chicago College Of Osteopathic Med
Graduation year2008 (18 years since medical school)
Gender (as listed)Female
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1043482102
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 October 2, 2026, retrieved October 29, 2026
  2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
  3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
  4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
  5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  6. Medicare Care Compare — official Medicare tool to look up clinicians