Quick answers
- Which hospitals does Mark Matiash work at?
- Medicare's official clinician data lists Mark Matiash at 1 hospital: Nyack Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark Matiash see patients?
- Medicare's clinician data lists 2 practice locations, including Forest Hills, NY and Nyack, NY. Call before your visit to confirm the address.
- What is Mark Matiash's specialty?
- Medicare lists Anesthesiology as the primary specialty.
- Does Mark Matiash accept Medicare assignment?
- Yes. Medicare's clinician data says Mark Matiash 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 Matiash?
- (718) 830-4000, as listed in official Medicare / NPI Registry data.
- What is Mark Matiash's NPI number?
- 1689661563. 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 Matiash works
Medicare's Facility Affiliation Data lists Mark Matiash at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Nyack HospitalNyack, NY · Acute Care Hospital · CCN 330104
Practice locations
Addresses where Mark Matiash is enrolled with Medicare (CMS data updated 2026-10-02).
- 10201 66th RdForest Hills, NY 11375 (718) 830‑4000
- 160 N Midland AveNyack, NY 10960 (845) 348‑2862
Group practices
Medicare enrollment lists Mark Matiash as a member of this group (CMS data updated 2026-10-02).
- North Shore - Lij Anesthesiology, PC1,003 clinicians in the group
Specialties
- Anesthesiologyprimary
Other anesthesiologists in Forest Hills
Clinicians with the same Medicare primary specialty in Forest Hills, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | State University Of New York At Stony Brook, School Of Medicine |
| Graduation year | 1998 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1689661563 |
| 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