Quick answers
- Which hospitals does Sameer M. Mazhar work at?
- Medicare's official clinician data lists Sameer M. Mazhar at 3 hospitals: Northwestern Medicine Central Dupage Hospital, Northwestern Medicine Delnor Community Hospital and Northwestern Memorial Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Sameer M. Mazhar see patients?
- Medicare's clinician data lists 1 practice location in Winfield, IL. Call before your visit to confirm the address.
- What is Sameer M. Mazhar's specialty?
- Medicare lists Gastroenterology as the primary specialty.
- Does Sameer M. Mazhar accept Medicare assignment?
- Yes. Medicare's clinician data says Sameer M. Mazhar 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 M. Mazhar offer telehealth?
- Medicare's clinician data says Sameer M. Mazhar offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Sameer M. Mazhar?
- (630) 933-1600, as listed in official Medicare / NPI Registry data.
- What is Sameer M. Mazhar's NPI number?
- 1497932461. 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 M. Mazhar works
Medicare's Facility Affiliation Data lists Sameer M. Mazhar at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Northwestern Medicine Central Dupage HospitalWinfield, IL · Acute Care Hospital · CCN 140242
- Northwestern Medicine Delnor Community HospitalGeneva, IL · Acute Care Hospital · CCN 140211
- Northwestern Memorial HospitalChicago, IL · Acute Care Hospital · CCN 140281
Practice locations
Addresses where Sameer M. Mazhar is enrolled with Medicare (CMS data updated 2026-10-02).
- 25 N Winfield RdWinfield, IL 60190 (630) 933‑1600
Group practices
Medicare enrollment lists Sameer M. Mazhar as a member of this group (CMS data updated 2026-10-02).
- Northwestern Medical Faculty Foundation4,503 clinicians in the group
Specialties
- Gastroenterologyprimary
Other gastroenterologists in Winfield
Clinicians with the same Medicare primary specialty in Winfield, IL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Northwestern University Feinberg Medical School |
| Graduation year | 2002 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1497932461 |
| 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