Quick answers
- Which hospitals does Athar Baig work at?
- Medicare's official clinician data lists Athar Baig at 5 hospitals: OSF Saint Clare Medical Center, OSF Saint Elizabeth MDL Ctr, Presence Saint Joseph Hospital - Chicago, Saint Francis Medical Center and St Alexius Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Athar Baig see patients?
- Medicare's clinician data lists 3 practice locations, including Ottawa, IL, Hoffman Estates, IL and Chicago, IL. Call before your visit to confirm the address.
- What is Athar Baig's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Athar Baig accept Medicare assignment?
- Yes. Medicare's clinician data says Athar Baig 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 Athar Baig?
- (815) 431-5380, as listed in official Medicare / NPI Registry data.
- What is Athar Baig's NPI number?
- 1649852492. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Athar Baig works
Medicare's Facility Affiliation Data lists Athar Baig at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- OSF Saint Clare Medical CenterPrinceton, IL · Critical Access Hospital · CCN 141337
- OSF Saint Elizabeth MDL CtrPeru, IL · Acute Care Hospital · CCN 140110
- Presence Saint Joseph Hospital - ChicagoChicago, IL · Acute Care Hospital · CCN 140224
- Saint Francis Medical CenterPeoria, IL · Acute Care Hospital · CCN 140067
- St Alexius Medical CenterHoffman Estates, IL · Acute Care Hospital · CCN 140290
Practice locations
Addresses where Athar Baig is enrolled with Medicare (CMS data updated 2026-10-02).
- 1100 E Norris DrOttawa, IL 61350 (815) 431‑5380
- 1555 Barrington RdHoffman Estates, IL 60169 (847) 843‑2000
- 2900 N Lake Shore DrChicago, IL 60657 (773) 665‑3000
Group practices
Medicare enrollment lists Athar Baig as a member of these groups (CMS data updated 2026-10-02).
- 24 on Physicians PC272 clinicians in the group
- Cook Physician Services, P.C.57 clinicians in the group
- Chicago Physician Services PC24 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Ottawa
Clinicians with the same Medicare primary specialty in Ottawa, IL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2014 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1649852492 |
| 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