Quick answers
- Which hospitals does Geoffrey E. Casimir work at?
- Medicare's official clinician data lists Geoffrey E. Casimir at 4 hospitals: Long Island Jewish Medical Center, North Shore University Hospital, Plainview Hospital and St Francis Hospital - The Heart Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Geoffrey E. Casimir see patients?
- Medicare's clinician data lists 1 practice location in Port Washington, NY. Call before your visit to confirm the address.
- What is Geoffrey E. Casimir's specialty?
- Medicare lists Infectious Disease as the primary specialty, and also Internal Medicine.
- Does Geoffrey E. Casimir accept Medicare assignment?
- Yes. Medicare's clinician data says Geoffrey E. Casimir 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 Geoffrey E. Casimir?
- (347) 276-6116, as listed in official Medicare / NPI Registry data.
- What is Geoffrey E. Casimir's NPI number?
- 1386098382. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Geoffrey E. Casimir works
Medicare's Facility Affiliation Data lists Geoffrey E. Casimir at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Long Island Jewish Medical CenterNew Hyde Park, NY · Acute Care Hospital · CCN 330195
- North Shore University HospitalManhasset, NY · Acute Care Hospital · CCN 330106
- Plainview HospitalPlainview, NY · Acute Care Hospital · CCN 330331
- St Francis Hospital - The Heart CenterRoslyn, NY · Acute Care Hospital · CCN 330182
Practice locations
Addresses where Geoffrey E. Casimir is enrolled with Medicare (CMS data updated 2026-10-02).
- 23 Murray AvePort Washington, NY 11050 (347) 276‑6116
Group practices
Medicare enrollment lists Geoffrey E. Casimir as a member of this group (CMS data updated 2026-10-02).
- Island Infectious Disease Medical PLLC5 clinicians in the group
Specialties
- Infectious Diseaseprimary
- Internal Medicinealso
Other infectious disease doctors in New York
Clinicians with the same Medicare primary specialty in New York — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Vanderbilt University School Of Medicine |
| Graduation year | 2016 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1386098382 |
| 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