Quick answers
- Which hospitals does Nicholas Zarkadis work at?
- Medicare's official clinician data lists Nicholas Zarkadis at 4 hospitals: Barnes-Jewish St Peters Hospital, Mercy Hospital Lincoln, Progress West Hospital and St Lukes Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Nicholas Zarkadis see patients?
- Medicare's clinician data lists 3 practice locations, including Troy, MO, O Fallon, MO and Saint Peters, MO. Call before your visit to confirm the address.
- What is Nicholas Zarkadis's specialty?
- Medicare lists Orthopedic Surgery as the primary specialty.
- Does Nicholas Zarkadis accept Medicare assignment?
- Yes. Medicare's clinician data says Nicholas Zarkadis 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 Nicholas Zarkadis?
- (636) 528-3407, as listed in official Medicare / NPI Registry data.
- What is Nicholas Zarkadis's NPI number?
- 1033558259. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Nicholas Zarkadis works
Medicare's Facility Affiliation Data lists Nicholas Zarkadis at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Barnes-Jewish St Peters HospitalSaint Peters, MO · Acute Care Hospital · CCN 260191
- Mercy Hospital LincolnTroy, MO · Critical Access Hospital · CCN 261319
- Progress West HospitalOfallon, MO · Acute Care Hospital · CCN 260219
- St Lukes HospitalChesterfield, MO · Acute Care Hospital · CCN 260179
Practice locations
Addresses where Nicholas Zarkadis is enrolled with Medicare (CMS data updated 2026-10-02).
- 1165 A E Cherry St, Mercy Clinic EastTroy, MO 63379 (636) 528‑3407
- 4701 State Hwy KO Fallon, MO 63368 (636) 441‑3444
- 5200 Executive Centre Pkwy, 300 St. Peters Bone and Joint SurgerySaint Peters, MO 63376 (636) 441‑3444
Group practices
Medicare enrollment lists Nicholas Zarkadis as a member of these groups (CMS data updated 2026-10-02).
- Mercy Clinic Surgical Specialists LLC182 clinicians in the group
- St Peters Bone and Joint Surgery Inc26 clinicians in the group
Specialties
- Orthopedic Surgeryprimary
Other orthopedic surgeons in Missouri
Clinicians with the same Medicare primary specialty in Missouri — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Graduation year | 2013 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1033558259 |
| 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