Nicholas Gourtzelis, MD
NPI 1790734994ActiveIndividual· Internal Medicine, Nephrology· St Louis, MO
Internal Medicine, Nephrology (MD) with Nhs South LLC, practicing in St Louis, Missouri. Their prescriptions cost Medicare Part D more than their services did: $1,038,767 for 1,350 claims, against $341,862 paid for services in 2024. Amgen Inc. was the largest of 21 companies reporting payments in 2025, $1,680 in all, mostly food and beverage. Lists Christian Hospital Northeast and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1790734994 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | May 8, 2006 |
| Last updated in NPPES | Jan 22, 2024 |
| Certified by provider | Jan 22, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | 2005006931 | MO |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Nephrology (MO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 701 |
|---|---|
| Services billed | 5,125 across 23 procedure codes |
| Paid by Medicare | $341,862 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,350 · 2,810 30-day fills |
|---|---|
| Patients | 234 |
| Total drug cost | $1,038,767 |
| Generic share | 85% of claims |
Education and affiliations
| Graduation year | 2000 |
|---|---|
| Medicare specialty | Nephrology |
Medical group
- Nhs South LLCSaint Louis, MO · 9 clinicians
Hospital affiliations
- Christian Hospital NortheastSaint Louis, MO
- Mercy Hospital JeffersonCrystal City, MO
- Mercy Hospital SouthSaint Louis, MO
- Mercy Hospital St LouisSaint Louis, MO
- Ssm Health St Mary's Hospital - St LouisSaint Louis, MO
Other facilities
- Davita Arnold DialysisDialysis facility · Arnold, MO
- Davita Lamplighter DialysisDialysis facility · Saint Louis, MO
- Fmc - Tesson Ferry DialysisDialysis facility · Saint Louis, MO
- Alternative Hospice, LLCHospice · Fenton, MO
- Mercy Rehabilitation Hospital SouthInpatient rehabilitation facility · Saint Louis, MO
- Mercy Rehabilitation Hospital St LouisInpatient rehabilitation facility · Chesterfield, MO
Industry payments (Open Payments)
- 2025$1,680 · 76 payments from 21 companies
- 2024$1,515 · 74 payments from 17 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $305.40 | 17 |
| Travere Therapeutics, Inc. | $238.93 | 9 |
| Otsuka America Pharmaceutical, Inc. | $197.03 | 11 |
| Novo Nordisk Inc | $102.66 | 5 |
| Vantive US Healthcare LLC | $101.31 | 2 |
What the 2025 payments were for
- Food and Beverage$1,680 · 76 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other nephrologists in St Louis
- 1235140864
- 1326059957
- 1437120888
- 1619323888
- 1730288317
- 1740251198
- 1932619772
- 1427276724