Quick answers
- Which hospitals does Jay L. Mathur work at?
- Medicare's official clinician data lists Jay L. Mathur at 2 hospitals: Greenwich Hospital Association - and Northwestern Lake Forest Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Jay L. Mathur see patients?
- Medicare's clinician data lists 6 practice locations, including Lake Forest, IL. Call before your visit to confirm the address.
- What is Jay L. Mathur's specialty?
- Medicare lists Hospitalist as the primary specialty, and also Internal Medicine.
- Does Jay L. Mathur accept Medicare assignment?
- Yes. Medicare's clinician data says Jay L. Mathur 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 Jay L. Mathur?
- (847) 535-8500, as listed in official Medicare / NPI Registry data.
- What is Jay L. Mathur's NPI number?
- 1891182515. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Jay L. Mathur works
Medicare's Facility Affiliation Data lists Jay L. Mathur at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Greenwich Hospital Association -Greenwich, CT · Acute Care Hospital · CCN 070018
- Northwestern Lake Forest HospitalLake Forest, IL · Acute Care Hospital · CCN 140130
Practice locations
Addresses where Jay L. Mathur is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 6; the Medicare profile lists all.
- 1000 N Westmoreland Rd, Pavillion B 3rd FlLake Forest, IL 60045 (847) 535‑8500
- 1000 Westmoreland RdLake Forest, IL 60045 (847) 234‑5600
- 1200 N Westmoreland Rd, Suite 100Lake Forest, IL 60045 (847) 735‑8500
- 600 N Westmoreland Rd, Suite 1100Lake Forest, IL 60045 (847) 535‑9510
- 660 N Westmoreland RdLake Forest, IL 60045 (847) 234‑5600
Group practices
Medicare enrollment lists Jay L. Mathur as a member of this group (CMS data updated 2026-10-02).
- Northwestern Medical Faculty Foundation4,503 clinicians in the group
Specialties
- Hospitalistprimary
- Internal Medicinealso
Other hospitalists in Lake Forest
Clinicians with the same Medicare primary specialty in Lake Forest, IL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2015 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1891182515 |
| 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