Gregory S. Schlessinger, MD
NPI 1255313441ActiveIndividual· Internal Medicine, Nephrology· Lone Tree, CO
Internal Medicine, Nephrology (MD) in Lone Tree, Colorado, trained at Vanderbilt University School of Medicine (class of 1993). Their prescriptions cost Medicare Part D more than their services did: $155,773 for 645 claims, against $28,893 paid for services in 2024. Amgen Inc. was the largest of 13 companies reporting payments in 2025, $492.10 in all, mostly food and beverage.
Overview
| NPI | 1255313441 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Nov 15, 2005 |
| Last updated in NPPES | Apr 4, 2023 |
| Certified by provider | Apr 4, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | 37524 | CO |
| Internal Medicine, Nephrology | 207RN0300X | 13028C | WY |
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 (AK); Practitioner - Nephrology (CA); Practitioner - Nephrology (CO); Practitioner - Nephrology (HI); Practitioner - Nephrology (KS); Practitioner - Nephrology (MO); Practitioner - Nephrology (NY); Practitioner - Nephrology (OK); Practitioner - Nephrology (TX); Practitioner - Nephrology (WY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 107 |
|---|---|
| Services billed | 300 across 23 procedure codes |
| Paid by Medicare | $28,893 |
Part D prescriptions in 2024
| Prescriptions (claims) | 645 · 1,420 30-day fills |
|---|---|
| Patients | 104 |
| Total drug cost | $155,773 |
| Generic share | 78% of claims |
Education and affiliations
| Medical school | Vanderbilt University School of Medicine |
|---|---|
| Graduation year | 1993 |
| Medicare specialty | Nephrology |
| Telehealth | Offers telehealth |
Medical group
- Rocky Mountain Kidney Care LLCAurora, CO · 17 clinicians
Hospital affiliations
- Sky Ridge Medical CenterLone Tree, CO
- The Medical Center of Aurora & South HospitalAurora, CO
Other facilities
- Usrc Altitude DialysisDialysis facility · Aurora, CO
- Usrc Lone TreeDialysis facility · Lonetree, CO
Industry payments (Open Payments)
- 2025$492.10 · 20 payments from 13 companies
- 2024$515.08 · 17 payments from 10 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $79.58 | 3 |
| Apellis Pharmaceuticals, Inc. | $71.34 | 3 |
| Calliditas Therapeutics US Inc. | $63.92 | 2 |
| Otsuka America Pharmaceutical, Inc. | $50.76 | 2 |
| Glaxosmithkline, LLC. | $40.21 | 2 |
What the 2025 payments were for
- Food and Beverage$492.10 · 20 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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