Quick answers
- Which hospitals does Marshall S. Grillo work at?
- Medicare's official clinician data lists Marshall S. Grillo at 3 hospitals: Holmes Regional Medical Center, MyMichigan Medical Center Midland and Viera Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Marshall S. Grillo see patients?
- Medicare's clinician data lists 7 practice locations, including Melbourne, FL, Midland, MI and Cocoa Beach, FL. Call before your visit to confirm the address.
- What is Marshall S. Grillo's specialty?
- Medicare lists Vascular Surgery as the primary specialty, and also General Surgery.
- Does Marshall S. Grillo accept Medicare assignment?
- Yes. Medicare's clinician data says Marshall S. Grillo 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 Marshall S. Grillo?
- (321) 725-4500, as listed in official Medicare / NPI Registry data.
- What is Marshall S. Grillo's NPI number?
- 1730114448. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Marshall S. Grillo works
Medicare's Facility Affiliation Data lists Marshall S. Grillo at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Holmes Regional Medical CenterMelbourne, FL · Acute Care Hospital · CCN 100019
- MyMichigan Medical Center MidlandMidland, MI · Acute Care Hospital · CCN 230222
- Viera HospitalMelbourne, FL · Acute Care Hospital · CCN 100315
Practice locations
Addresses where Marshall S. Grillo is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 7; the Medicare profile lists all.
- 1223 Gateway DrMelbourne, FL 32901 (321) 725‑4500
- 1350 Hickory StMelbourne, FL 32901
- 1350 Hickory St, Suite 102Melbourne, FL 32901 (321) 434‑8878
- 2660 W Sugnet RdMidland, MI 48640
- 4000 Wellness DrMidland, MI 48670 (989) 633‑8018
Group practices
Medicare enrollment lists Marshall S. Grillo as a member of these groups (CMS data updated 2026-10-02).
- Health First Medical Group, LLC711 clinicians in the group
- MyMichigan Medical Center Midland507 clinicians in the group
Specialties
- Vascular Surgeryprimary
- General Surgeryalso
Other vascular surgeons in Melbourne
Clinicians with the same Medicare primary specialty in Melbourne, FL — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | At Still University Of Health Sciences, College Of Osteo Med, Kirksville |
| Graduation year | 1990 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1730114448 |
| 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