Quick answers
- Which hospitals does Nicholas Gourtzelis work at?
- Medicare's official clinician data lists Nicholas Gourtzelis at 5 hospitals: Christian Hospital Northeast, Mercy Hospital Jefferson, Mercy Hospital South, Mercy Hospital St Louis and SSM Health St Mary's Hospital - St Louis. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Nicholas Gourtzelis see patients?
- Medicare's clinician data lists 10 practice locations, including Saint Louis, MO, Arnold, MO and Bridgeton, MO. Call before your visit to confirm the address.
- What is Nicholas Gourtzelis's specialty?
- Medicare lists Nephrology as the primary specialty.
- Does Nicholas Gourtzelis accept Medicare assignment?
- Yes. Medicare's clinician data says Nicholas Gourtzelis 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 Gourtzelis?
- (314) 842-9669, as listed in official Medicare / NPI Registry data.
- What is Nicholas Gourtzelis's NPI number?
- 1790734994. 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 Gourtzelis works
Medicare's Facility Affiliation Data lists Nicholas Gourtzelis at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Christian Hospital NortheastSaint Louis, MO · Acute Care Hospital · CCN 260180
- Mercy Hospital JeffersonCrystal City, MO · Acute Care Hospital · CCN 260023
- Mercy Hospital SouthSaint Louis, MO · Acute Care Hospital · CCN 260077
- Mercy Hospital St LouisSaint Louis, MO · Acute Care Hospital · CCN 260020
- SSM Health St Mary's Hospital - St LouisSaint Louis, MO · Acute Care Hospital · CCN 260091
Practice locations
Addresses where Nicholas Gourtzelis is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 10; the Medicare profile lists all.
- 10004 Kennerly Rd, Suite 374bSaint Louis, MO 63128 (314) 842‑9669
- 10010 Kennerly RdSaint Louis, MO 63128 (314) 525‑1000
- 102 Richardson XingArnold, MO 63010 (314) 842‑9669
- 11107 S Towne SqSaint Louis, MO 63123 (314) 842‑9669
- 11133 Dunn RdSaint Louis, MO 63136 (314) 653‑5000
Group practices
Medicare enrollment lists Nicholas Gourtzelis as a member of this group (CMS data updated 2026-10-02).
- NHS South LLC9 clinicians in the group
Specialties
- Nephrologyprimary
Other nephrologists in Saint Louis
Clinicians with the same Medicare primary specialty in Saint Louis, MO — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2000 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1790734994 |
| 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