Quick answers
- Which hospitals does Mark Lowenthal work at?
- Medicare's official clinician data lists Mark Lowenthal at 3 hospitals: Advocate Good Shepherd Hospital, Northshore University Healthsystem - Evanston Hospital and Northwest Community Hospital 1. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark Lowenthal see patients?
- Medicare's clinician data lists 2 practice locations, including Highland Park, IL and Barrington, IL. Call before your visit to confirm the address.
- What is Mark Lowenthal's specialty?
- Medicare lists Allergy/Immunology as the primary specialty.
- Does Mark Lowenthal accept Medicare assignment?
- Yes. Medicare's clinician data says Mark Lowenthal 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 Mark Lowenthal offer telehealth?
- Medicare's clinician data says Mark Lowenthal offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Mark Lowenthal?
- (847) 433-7660, as listed in official Medicare / NPI Registry data.
- What is Mark Lowenthal's NPI number?
- 1407830136. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mark Lowenthal works
Medicare's Facility Affiliation Data lists Mark Lowenthal at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Advocate Good Shepherd HospitalBarrington, IL · Acute Care Hospital · CCN 140291
- Northshore University Healthsystem - Evanston HospitalEvanston, IL · Acute Care Hospital · CCN 140010
- Northwest Community Hospital 1Arlington Heights, IL · Acute Care Hospital · CCN 140252
Practice locations
Addresses where Mark Lowenthal is enrolled with Medicare (CMS data updated 2026-10-02).
- 1849 Greenbay Rd, Suite 220Highland Park, IL 60035 (847) 433‑7660
- 27790 W Hwy 22, Suite 16Barrington, IL 60010 (847) 382‑2050
Group practices
Medicare enrollment lists Mark Lowenthal as a member of this group (CMS data updated 2026-10-02).
- Associated Allergists and Asthma Specialists, Ltd4 clinicians in the group
Specialties
- Allergy/Immunologyprimary
Other allergist and immunologists in Highland Park
Clinicians with the same Medicare primary specialty in Highland Park, IL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Northwestern University Feinberg Medical School |
| Graduation year | 1987 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1407830136 |
| 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