Quick answers
- Which hospitals does Sandra Mazzeffi work at?
- Medicare's official clinician data lists Sandra Mazzeffi at 4 hospitals: Advocate Good Shepherd Hospital, Loyola University Medical Center, Rush Oak Park Hospital and Rush University Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Sandra Mazzeffi see patients?
- Medicare's clinician data lists 1 practice location in Chicago, IL. Call before your visit to confirm the address.
- What is Sandra Mazzeffi's specialty?
- Medicare lists Nurse Practitioner as the primary specialty.
- Does Sandra Mazzeffi accept Medicare assignment?
- Yes. Medicare's clinician data says Sandra Mazzeffi accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- Does Sandra Mazzeffi offer telehealth?
- Medicare's clinician data says Sandra Mazzeffi offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Sandra Mazzeffi?
- (312) 809-1330, as listed in official Medicare / NPI Registry data.
- What is Sandra Mazzeffi's NPI number?
- 1740844232. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Sandra Mazzeffi works
Medicare's Facility Affiliation Data lists Sandra Mazzeffi at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Advocate Good Shepherd HospitalBarrington, IL · Acute Care Hospital · CCN 140291
- Loyola University Medical CenterMaywood, IL · Acute Care Hospital · CCN 140276
- Rush Oak Park HospitalOak Park, IL · Acute Care Hospital · CCN 140063
- Rush University Medical CenterChicago, IL · Acute Care Hospital · CCN 140119
Practice locations
Addresses where Sandra Mazzeffi is enrolled with Medicare (CMS data updated 2026-10-02).
- 1725 W Harrison St, Suite 1156Chicago, IL 60612 (312) 809‑1330
Group practices
Medicare enrollment lists Sandra Mazzeffi as a member of this group (CMS data updated 2026-10-02).
- Rush University Medical Group1,551 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.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2019 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1740844232 |
| 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 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- 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