Quick answers
- Which hospitals does Sameer Ansar work at?
- Medicare's official clinician data lists Sameer Ansar at 5 hospitals: OSF Saint Katharine Medical Center, OSF Saint Paul Medical Center, Rochelle Community Hospital, Saint Anthony Medical Center and UW Health. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Sameer Ansar see patients?
- Medicare's clinician data lists 2 practice locations, including Rockford, IL and Peoria, IL. Call before your visit to confirm the address.
- What is Sameer Ansar's specialty?
- Medicare lists Endocrinology as the primary specialty, and also Internal Medicine.
- Does Sameer Ansar accept Medicare assignment?
- Yes. Medicare's clinician data says Sameer Ansar 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 Sameer Ansar offer telehealth?
- Medicare's clinician data says Sameer Ansar offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Sameer Ansar?
- (815) 921-8929, as listed in official Medicare / NPI Registry data.
- What is Sameer Ansar's NPI number?
- 1942485735. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Sameer Ansar works
Medicare's Facility Affiliation Data lists Sameer Ansar at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- OSF Saint Katharine Medical CenterDixon, IL · Acute Care Hospital · CCN 140012
- OSF Saint Paul Medical CenterMendota, IL · Critical Access Hospital · CCN 141310
- Rochelle Community HospitalRochelle, IL · Critical Access Hospital · CCN 141312
- Saint Anthony Medical CenterRockford, IL · Acute Care Hospital · CCN 140233
- UW HealthRockford, IL · Acute Care Hospital · CCN 140228
Practice locations
Addresses where Sameer Ansar is enrolled with Medicare (CMS data updated 2026-10-02).
- 5666 E State StRockford, IL 61108 (815) 921‑8929
- 8600 State Route 91, Suite 130Peoria, IL 61615 (309) 683‑5050
Group practices
Medicare enrollment lists Sameer Ansar as a member of this group (CMS data updated 2026-10-02).
- OSF Multi-Specialty Group2,114 clinicians in the group
Specialties
- Endocrinologyprimary
- Internal Medicinealso
Other endocrinologists in Illinois
Clinicians with the same Medicare primary specialty in Illinois — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2002 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1942485735 |
| 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