Quick answers
- Which hospitals does Mark D. Solomon work at?
- Medicare's official clinician data lists Mark D. Solomon at 5 hospitals: John T Mather Memorial Hospital of Port Jefferson, St Catherine of Siena Hospital, St Charles Hospital, St Francis Hospital - The Heart Center and Suny/Stony Brook University Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark D. Solomon see patients?
- Medicare's clinician data lists 1 practice location in Mount Sinai, NY. Call before your visit to confirm the address.
- What is Mark D. Solomon's specialty?
- Medicare lists Nephrology as the primary specialty, and also Internal Medicine.
- Does Mark D. Solomon accept Medicare assignment?
- Yes. Medicare's clinician data says Mark D. Solomon 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 Mark D. Solomon?
- (631) 331-4403, as listed in official Medicare / NPI Registry data.
- What is Mark D. Solomon's NPI number?
- 1336151158. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mark D. Solomon works
Medicare's Facility Affiliation Data lists Mark D. Solomon at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- John T Mather Memorial Hospital of Port JeffersonPort Jefferson, NY · Acute Care Hospital · CCN 330185
- St Catherine of Siena HospitalSmithtown, NY · Acute Care Hospital · CCN 330401
- St Charles HospitalPort Jefferson, NY · Acute Care Hospital · CCN 330246
- St Francis Hospital - The Heart CenterRoslyn, NY · Acute Care Hospital · CCN 330182
- Suny/Stony Brook University HospitalStony Brook, NY · Acute Care Hospital · CCN 330393
Practice locations
Addresses where Mark D. Solomon is enrolled with Medicare (CMS data updated 2026-10-02).
- 701 Route 25a, Suite B1Mount Sinai, NY 11766 (631) 331‑4403
Group practices
Medicare enrollment lists Mark D. Solomon as a member of this group (CMS data updated 2026-10-02).
- CHS Physician Partners PC743 clinicians in the group
Specialties
- Nephrologyprimary
- Internal Medicinealso
Other nephrologists in New York
Clinicians with the same Medicare primary specialty in New York — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1988 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1336151158 |
| 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