Sixto G. Giusti, MD
NPI 1134413792ActiveIndividual· Internal Medicine, Nephrology· Aurora, CO
Internal Medicine, Nephrology (MD) with University Physicians Incorporated, practicing in Aurora, Colorado. Their prescriptions cost Medicare Part D more than their services did: $585,169 for 1,052 claims, against $41,214 paid for services in 2024. Mallinckrodt Hospital Products Inc. reported $7,665 in payments in 2025, mostly speaking and faculty fees. Lists Longs Peak Hospital and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1134413792 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Jun 1, 2011 |
| Last updated in NPPES | Nov 4, 2021 |
| Certified by provider | Nov 4, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | DR.0067086 | CO |
| Transplant Surgery | 204F00000X | MD.206984 | LA |
| Internal Medicine, Nephrology | 207RN0300X | MD.206984 | LA |
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 (CO); Practitioner - Nephrology (MT) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 172 |
|---|---|
| Services billed | 460 across 16 procedure codes |
| Paid by Medicare | $41,214 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,052 · 2,289 30-day fills |
|---|---|
| Patients | 223 |
| Total drug cost | $585,169 |
| Generic share | 94% of claims |
Education and affiliations
| Graduation year | 2010 |
|---|---|
| Medicare specialty | Nephrology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- University Physicians IncorporatedAurora, CO · 3,215 clinicians
Hospital affiliations
- Longs Peak HospitalLongmont, CO
- Medical Center of the RockiesLoveland, CO
- Poudre Valley HospitalFort Collins, CO
- Uch-Memorial Health SystemColorado Springs, CO
- University of Colorado Hospital AuthorityAurora, CO
Industry payments (Open Payments)
- 2025$7,665 · 5 payments from 1 company
- 2024$14,750 · 13 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Mallinckrodt Hospital Products Inc. | $7,665 | 5 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$7,475 · 2 payments
- Travel and Lodging$104.40 · 2 payments
- Food and Beverage$85.41 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other nephrologists in Aurora
- 1013115989
- 1013399120
- 1023383585
- 1134361793
- 1154555704
- 1235229139
- 1245212448
- 1285616573
- 1326185695
- 1326326414
- 1346330248
- 1356441836
All 51 nephrologists in Aurora · All nephrologists in Colorado