Quick answers
- Does Colleen A. Chierici accept Medicare assignment?
- Yes. Medicare's clinician data says Colleen A. Chierici 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 Colleen A. Chierici see?
- In 2024, CMS data shows 88 Original Medicare patients and 285 services for Colleen A. Chierici. This counts Original Medicare only and measures volume, not quality.
- What is Colleen A. Chierici's NPI number?
- 1841918232. 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 Colleen A. Chierici, 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 | 88 |
|---|---|
| Services billed to Medicare | 285 |
| Different services or procedures | 8 |
| Participating Medicare provider | Yes |
| Average age of these patients | 71 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)151 services
- Continuous monitoring of blood sugar level in tissue fluid using sensor under skin with interpretation and report (95251)93 services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)17 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%
- Diabetes75%
- Chronic kidney disease56%
- Arthritis48%
- Ischemic heart disease45%
Hospitals where Colleen A. Chierici works
Medicare's Facility Affiliation Data lists Colleen A. Chierici 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.
- Rush Oak Park HospitalOak Park, IL · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 140063
Practice locations
Addresses where Colleen A. Chierici is enrolled with Medicare (CMS data updated October 2, 2026).
- 520 S Maple Ave, Fl 3Oak Park, IL 60304 (708) 660‑5900
- 520 S Maple Ave 3rd FloorOak Park, IL 60304 (708) 660‑5900
Group practices
Medicare enrollment lists Colleen A. Chierici as a member of these groups (CMS data updated October 2, 2026).
- Rush University Medical Group1,551 clinicians in the group
- Rush Oak Park Physicians Group Center for Diabetes and Endocrine7 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Oak Park
Clinicians with the same Medicare primary specialty in Oak Park, IL — not a recommendation.
Other clinicians in Rush University Medical Group
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2022 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1841918232 |
| 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