Quick answers
- Does Natalie J. Zimmer accept Medicare assignment?
- Yes. Medicare's clinician data says Natalie J. Zimmer 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 Natalie J. Zimmer see?
- In 2024, CMS data shows 231 Original Medicare patients and 365 services for Natalie J. Zimmer. This counts Original Medicare only and measures volume, not quality.
- What is Natalie J. Zimmer's NPI number?
- 1528580917. 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 Natalie J. Zimmer, 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 patients | 231 |
|---|---|
| Services billed to Medicare | 365 |
| Different services or procedures | 47 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)71 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)60 services
- Emergency department visit with high level of medical decision making (99285)52 services
- Emergency department visit with moderate level of medical decision making (99284)25 services
- Amplifed dna or rna probe detection of severe acute respiratory syndrome coronavirus 2 (covid-19) antigen (87635)21 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 cholesterol74%
- High blood pressure66%
- Arthritis52%
- Ischemic heart disease28%
- Anxiety26%
- Chronic kidney disease23%
Hospitals where Natalie J. Zimmer works
Medicare's Facility Affiliation Data lists Natalie J. Zimmer 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.
- Northwestern Lake Forest HospitalLake Forest, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140130
- Northwestern Medicine Central Dupage HospitalWinfield, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140242
- Northwestern Memorial HospitalChicago, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140281
Practice locations
Addresses where Natalie J. Zimmer is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 19; the Medicare profile lists all.
- 1135 S Delano Ct EChicago, IL 60605 (630) 933‑1500
- 1135 W Delano Ct, A201Chicago, IL 60605 (312) 695‑0665
- 1333 W Belmont AveChicago, IL 60657
- 1630 Sherman AveEvanston, IL 60201
- 171 N Aberdeen St, Suite 100Chicago, IL 60607 (312) 926‑4150
Group practices
Medicare enrollment lists Natalie J. Zimmer as a member of these groups (CMS data updated October 2, 2026).
- Northwestern Medical Faculty Foundation4,503 clinicians in the group
- Michigan Avenue Internists9 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Chicago
Clinicians with the same Medicare primary specialty in Chicago, IL — not a recommendation.
Other clinicians in Northwestern Medical Faculty Foundation
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2017 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1528580917 |
| Corrections | Report 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians