Quick answers
- Does Karen L. Nichols accept Medicare assignment?
- Yes. Medicare's clinician data says Karen L. Nichols 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 Karen L. Nichols see?
- In 2024, CMS data shows 90 Original Medicare patients and 508 services for Karen L. Nichols. This counts Original Medicare only and measures volume, not quality.
- What is Karen L. Nichols's NPI number?
- 1154458941. 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 Karen L. Nichols, 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 | 90 |
|---|---|
| Services billed to Medicare | 508 |
| Different services or procedures | 11 |
| Participating Medicare provider | Yes |
| Average age of these patients | 80 |
Most frequent services
- Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes (99309)249 services
- Advance care planning, first 30 minutes (99497)100 services
- Nursing facility discharge management, more than 30 minutes (99316)62 services
- Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes (99310)45 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%
- Arthritis67%
- Chronic kidney disease57%
- Ischemic heart disease48%
- Heart failure48%
Practice locations
Addresses where Karen L. Nichols is enrolled with Medicare (CMS data updated October 2, 2026).
- 214 McHenry RdBuffalo Grove, IL 60089 (847) 459‑1160
- 2940 W 87th StChicago, IL 60652 (773) 434‑8787
- 3700 W 103rd StChicago, IL 60655 (773) 298‑3712
Group practices
Medicare enrollment lists Karen L. Nichols as a member of these groups (CMS data updated October 2, 2026).
- Advocate Health and Hospitals Corporation3,118 clinicians in the group
- Saint Xavier University5 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Buffalo Grove
Clinicians with the same Medicare primary specialty in Buffalo Grove, 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 |
|---|---|
| Graduation year | 2005 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1154458941 |
| 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
- 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