Quick answers
- Which hospitals does Ari Seifter work at?
- Medicare's official clinician data lists Ari Seifter at 2 hospitals: Advocate Christ Hospital & Medical Center and Advocate Trinity Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Ari Seifter see patients?
- Medicare's clinician data lists 1 practice location in Chicago, IL. Call before your visit to confirm the address.
- What is Ari Seifter's specialty?
- Medicare lists Hematology/Oncology as the primary specialty, and also Internal Medicine.
- Does Ari Seifter accept Medicare assignment?
- Yes. Medicare's clinician data says Ari Seifter 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 Ari Seifter offer telehealth?
- Medicare's clinician data says Ari Seifter offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Ari Seifter?
- (312) 842-7117, as listed in official Medicare / NPI Registry data.
- What is Ari Seifter's NPI number?
- 1851785091. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Ari Seifter works
Medicare's Facility Affiliation Data lists Ari Seifter at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Advocate Christ Hospital & Medical CenterOak Lawn, IL · Acute Care Hospital · CCN 140208
- Advocate Trinity HospitalChicago, IL · Acute Care Hospital · CCN 140048
Practice locations
Addresses where Ari Seifter is enrolled with Medicare (CMS data updated 2026-10-02).
- 2535 S Martin Luther King DrChicago, IL 60616 (312) 842‑7117
Group practices
Medicare enrollment lists Ari Seifter as a member of this group (CMS data updated 2026-10-02).
- Advocate Health and Hospitals Corporation3,118 clinicians in the group
Specialties
- Hematology/Oncologyprimary
- Internal Medicinealso
Other hematologist-oncologists in Chicago
Clinicians with the same Medicare primary specialty in Chicago, IL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Maryland School Of Medicine |
| Graduation year | 2015 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1851785091 |
| 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