Quick answers
- Does Jennifer I. Klaas accept Medicare assignment?
- Yes. Medicare's clinician data says Jennifer I. Klaas 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 Jennifer I. Klaas see?
- In 2024, CMS data shows 188 Original Medicare patients and 365 services for Jennifer I. Klaas. This counts Original Medicare only and measures volume, not quality.
- What is Jennifer I. Klaas's NPI number?
- 1932469640. 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 Jennifer I. Klaas, 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 | 188 |
|---|---|
| Services billed to Medicare | 365 |
| Different services or procedures | 7 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)263 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)89 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 cholesterol75%
- Chronic kidney disease68%
- Diabetes63%
- Heart failure57%
- Arthritis55%
Hospitals where Jennifer I. Klaas works
Medicare's Facility Affiliation Data lists Jennifer I. Klaas 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.
- Advocate Trinity HospitalChicago, IL · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 140048
Practice locations
Addresses where Jennifer I. Klaas is enrolled with Medicare (CMS data updated October 2, 2026).
- 17800 Kedzie AveHazel Crest, IL 60429 (708) 684‑5340
- 214 McHenry RdBuffalo Grove, IL 60089 (847) 459‑1160
Group practices
Medicare enrollment lists Jennifer I. Klaas as a member of this group (CMS data updated October 2, 2026).
- Advocate Health and Hospitals Corporation3,118 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Hazel Crest
Clinicians with the same Medicare primary specialty in Hazel Crest, IL — not a recommendation.
Other clinicians in Advocate Health and Hospitals Corporation
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| School | Rush Medical College Of Rush University |
| Graduation year | 2011 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1932469640 |
| 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