Quick answers
- Which hospitals does Marc E. Portner work at?
- Medicare's official clinician data lists Marc E. Portner at 1 hospital: Lakeland Regional Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Marc E. Portner see patients?
- Medicare's clinician data lists 3 practice locations, including Lakeland, FL. Call before your visit to confirm the address.
- What is Marc E. Portner's specialty?
- Medicare lists Critical Care (Intensivists) as the primary specialty, and also Emergency Medicine.
- Does Marc E. Portner accept Medicare assignment?
- Yes. Medicare's clinician data says Marc E. Portner 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 Marc E. Portner?
- (863) 603-6565, as listed in official Medicare / NPI Registry data.
- What is Marc E. Portner's NPI number?
- 1831222959. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Marc E. Portner works
Medicare's Facility Affiliation Data lists Marc E. Portner at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Lakeland Regional Medical CenterLakeland, FL · Acute Care Hospital · CCN 100157
Practice locations
Addresses where Marc E. Portner is enrolled with Medicare (CMS data updated 2026-10-02).
- 1324 Lakeland Hill BlvdLakeland, FL 33805
- 3525 Lakeland Hills BlvdLakeland, FL 33805 (863) 603‑6565
- Attn Managed Care, 1324 Lakeland Hlls BlvdLakeland, FL 33805
Group practices
Medicare enrollment lists Marc E. Portner as a member of this group (CMS data updated 2026-10-02).
- Lakeland Regional Health Systems Inc536 clinicians in the group
Specialties
Find other Critical Care (Intensivists) doctors in Florida →
Other critical care doctors in Lakeland
Clinicians with the same Medicare primary specialty in Lakeland, FL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Pennsylvania State University College Of Medicine |
| Graduation year | 2003 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1831222959 |
| 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