Quick answers
- Which hospitals does Behfar Dianati work at?
- Medicare's official clinician data lists Behfar Dianati at 4 hospitals: Alton Memorial Hospital, Christian Hospital Northeast, OSF Saint Anthony's Health Center and SSM Health Saint Louis University Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Behfar Dianati see patients?
- Medicare's clinician data lists 3 practice locations, including Alton, IL and O Fallon, IL. Call before your visit to confirm the address.
- What is Behfar Dianati's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Behfar Dianati accept Medicare assignment?
- Yes. Medicare's clinician data says Behfar Dianati 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.
- What is the phone number for Behfar Dianati?
- (618) 465-2571, as listed in official Medicare / NPI Registry data.
- What is Behfar Dianati's NPI number?
- 1558580852. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Behfar Dianati works
Medicare's Facility Affiliation Data lists Behfar Dianati at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Alton Memorial HospitalAlton, IL · Acute Care Hospital · CCN 140002
- Christian Hospital NortheastSaint Louis, MO · Acute Care Hospital · CCN 260180
- OSF Saint Anthony's Health CenterAlton, IL · Acute Care Hospital · CCN 140052
- SSM Health Saint Louis University HospitalSaint Louis, MO · Acute Care Hospital · CCN 260105
Practice locations
Addresses where Behfar Dianati is enrolled with Medicare (CMS data updated 2026-10-02).
- 1 Saint Anthonys WayAlton, IL 62002 (618) 465‑2571
- 1 Saint Elizabeth BlvdO Fallon, IL 62269 (618) 234‑2120
- 3490 Humbert RdAlton, IL 62002 (618) 465‑2626
Group practices
Medicare enrollment lists Behfar Dianati as a member of these groups (CMS data updated 2026-10-02).
- Cep America-Illinois Hospitalists, LLP196 clinicians in the group
- Cep America - Illinois SNF LLP8 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Alton
Clinicians with the same Medicare primary specialty in Alton, IL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1994 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1558580852 |
| 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