Quick answers
- Which hospitals does Constantine Yiachos work at?
- Medicare's official clinician data lists Constantine Yiachos at 2 hospitals: Richmond University Medical Center and Staten Island University Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Constantine Yiachos see patients?
- Medicare's clinician data lists 2 practice locations, including Staten Island, NY. Call before your visit to confirm the address.
- What is Constantine Yiachos's specialty?
- Medicare lists Gastroenterology as the primary specialty.
- Does Constantine Yiachos accept Medicare assignment?
- Yes. Medicare's clinician data says Constantine Yiachos 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 Constantine Yiachos?
- (718) 720-5928, as listed in official Medicare / NPI Registry data.
- What is Constantine Yiachos's NPI number?
- 1063588127. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Constantine Yiachos works
Medicare's Facility Affiliation Data lists Constantine Yiachos at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Richmond University Medical CenterStaten Island, NY · Acute Care Hospital · CCN 330028
- Staten Island University HospitalStaten Island, NY · Acute Care Hospital · CCN 330160
Practice locations
Addresses where Constantine Yiachos is enrolled with Medicare (CMS data updated 2026-10-02).
- 129 Slosson AveStaten Island, NY 10314 (718) 720‑5928
- 1441 S AveStaten Island, NY 10314 (718) 987‑9777
Group practices
Medicare enrollment lists Constantine Yiachos as a member of this group (CMS data updated 2026-10-02).
- Icahn School of Medicine at Mount Sinai33 clinicians in the group
Specialties
- Gastroenterologyprimary
Other gastroenterologists in Staten Island
Clinicians with the same Medicare primary specialty in Staten Island, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | State University Of New York Downstate Medical Center |
| Graduation year | 1985 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1063588127 |
| 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