Quick answers
- Which hospitals does Ari Kostadaras work at?
- Medicare's official clinician data lists Ari Kostadaras at 1 hospital: Mount Sinai Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Ari Kostadaras see patients?
- Medicare's clinician data lists 2 practice locations, including Astoria, NY. Call before your visit to confirm the address.
- What is Ari Kostadaras's specialty?
- Medicare lists Internal Medicine as the primary specialty, and also Nephrology.
- Does Ari Kostadaras accept Medicare assignment?
- Yes. Medicare's clinician data says Ari Kostadaras 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 Ari Kostadaras?
- (718) 721-4440, as listed in official Medicare / NPI Registry data.
- What is Ari Kostadaras's NPI number?
- 1447285911. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Ari Kostadaras works
Medicare's Facility Affiliation Data lists Ari Kostadaras at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Mount Sinai HospitalNew York, NY · Acute Care Hospital · CCN 330024
Practice locations
Addresses where Ari Kostadaras is enrolled with Medicare (CMS data updated 2026-10-02).
- 2510 38th StAstoria, NY 11103
- 3016 30th DrAstoria, NY 11102 (718) 721‑4440
Specialties
- Internal Medicineprimary
- Nephrologyalso
Other internal medicine doctors in Astoria
Clinicians with the same Medicare primary specialty in Astoria, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1989 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1447285911 |
| 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