Quick answers
- Which hospitals does Brian Liem work at?
- Medicare's official clinician data lists Brian Liem at 4 hospitals: Advocate Sherman Hospital, Northwestern Medicine Central Dupage Hospital, Northwestern Medicine McHenry and Saint Joseph Hospital-Elgin. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Brian Liem see patients?
- Medicare's clinician data lists 7 practice locations, including Arlington Heights, IL, Elgin, IL and Lake In The Hills, IL. Call before your visit to confirm the address.
- What is Brian Liem's specialty?
- Medicare lists Gastroenterology as the primary specialty.
- Does Brian Liem accept Medicare assignment?
- Yes. Medicare's clinician data says Brian Liem 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 Brian Liem?
- (847) 742-9800, as listed in official Medicare / NPI Registry data.
- What is Brian Liem's NPI number?
- 1871892232. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Brian Liem works
Medicare's Facility Affiliation Data lists Brian Liem at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Advocate Sherman HospitalElgin, IL · Acute Care Hospital · CCN 140030
- Northwestern Medicine Central Dupage HospitalWinfield, IL · Acute Care Hospital · CCN 140242
- Northwestern Medicine McHenryMcHenry, IL · Acute Care Hospital · CCN 140116
- Saint Joseph Hospital-ElginElgin, IL · Acute Care Hospital · CCN 140217
Practice locations
Addresses where Brian Liem is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 7; the Medicare profile lists all.
- 1415 S Arlington Heights RdArlington Heights, IL 60005
- 1425 N Randall RdElgin, IL 60123 (847) 742‑9800
- 165 N Lakewood Rd, Suite DLake In The Hills, IL 60156 (847) 888‑1300
- 2000 McDonald Rd, Suite 260South Elgin, IL 60177 (847) 888‑1300
- 2550 Algonquin RdLake In The Hills, IL 60156 (847) 458‑1246
Group practices
Medicare enrollment lists Brian Liem as a member of this group (CMS data updated 2026-10-02).
- Illinois Gastroenterology Group LLC115 clinicians in the group
Specialties
- Gastroenterologyprimary
Other gastroenterologists in Arlington Heights
Clinicians with the same Medicare primary specialty in Arlington Heights, IL — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Graduation year | 2011 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1871892232 |
| 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