Quick answers
- Which hospitals does Frank G. Martini work at?
- Medicare's official clinician data lists Frank G. Martini at 3 hospitals: Northwestern Lake Forest Hospital, Northwestern Medicine McHenry and Northwestern Memorial Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Frank G. Martini see patients?
- Medicare's clinician data lists 14 practice locations, including Lake Forest, IL, Grayslake, IL and Deerfield, IL. Call before your visit to confirm the address.
- What is Frank G. Martini's specialty?
- Medicare lists Gastroenterology as the primary specialty, and also Internal Medicine.
- Does Frank G. Martini accept Medicare assignment?
- Yes. Medicare's clinician data says Frank G. Martini 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 Frank G. Martini?
- (847) 535-8500, as listed in official Medicare / NPI Registry data.
- What is Frank G. Martini's NPI number?
- 1588642136. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Frank G. Martini works
Medicare's Facility Affiliation Data lists Frank G. Martini at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Northwestern Lake Forest HospitalLake Forest, IL · Acute Care Hospital · CCN 140130
- Northwestern Medicine McHenryMcHenry, IL · Acute Care Hospital · CCN 140116
- Northwestern Memorial HospitalChicago, IL · Acute Care Hospital · CCN 140281
Practice locations
Addresses where Frank G. Martini is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 14; 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
- 1475 E Belvidere RdGrayslake, IL 60030
- 350 S Waukegan, Suite 150Deerfield, IL 60015 (312) 926‑3107
- 350 S Waukegan RdDeerfield, IL 60015 (312) 926‑6146
Group practices
Medicare enrollment lists Frank G. Martini as a member of this group (CMS data updated 2026-10-02).
- Northwestern Medical Faculty Foundation4,503 clinicians in the group
Specialties
- Gastroenterologyprimary
- Internal Medicinealso
Other gastroenterologists in Illinois
Clinicians with the same Medicare primary specialty in Illinois — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1982 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1588642136 |
| 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