Gregory Daniel Spin, D.O.
NPI 1114977386ActiveIndividual· Internal Medicine, Nephrology· Roseville, CA
Internal Medicine, Nephrology (D.O.) in Roseville, California, trained at College of Osteopathic Physicians and Surgeons of Los Angeles (class of 1999). Their prescriptions cost Medicare Part D more than their services did: $614,970 for 3,090 claims, against $280,495 paid for services in 2024. Novartis Pharmaceuticals Corporation was the largest of 8 companies reporting payments in 2025, $571.76 in all, mostly food and beverage.
Overview
| NPI | 1114977386 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | D.O. |
| Sole proprietor | No |
| NPI issued | May 11, 2006 |
| Last updated in NPPES | Dec 15, 2014 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | 20A7602 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Nephrology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 688 |
|---|---|
| Services billed | 2,758 across 28 procedure codes |
| Paid by Medicare | $280,495 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,090 · 7,507 30-day fills |
|---|---|
| Patients | 389 |
| Total drug cost | $614,970 |
| Generic share | 88% of claims |
Education and affiliations
| Medical school | College of Osteopathic Physicians and Surgeons of Los Angeles |
|---|---|
| Graduation year | 1999 |
| Medicare specialty | Nephrology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Summit Nephrology Medical Group, Inc.Grass Valley, CA · 10 clinicians
Hospital affiliations
- Oroville HospitalOroville, CA
- Sierra Nevada Memorial HospitalGrass Valley, CA
- Sutter Auburn Faith HospitalAuburn, CA
- Sutter Medical Center, SacramentoSacramento, CA
- Sutter Roseville Medical CenterRoseville, CA
Other facilities
- Davita Auburn DialysisDialysis facility · Auburn, CA
- Davita Grass Valley DialysisDialysis facility · Grass Valley, CA
Industry payments (Open Payments)
- 2025$571.76 · 13 payments from 8 companies
- 2024$255.69 · 7 payments from 7 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novartis Pharmaceuticals Corporation | $249.57 | 5 |
| Apellis Pharmaceuticals, Inc. | $91.83 | 1 |
| Nxstage Medical, Inc. | $91.73 | 2 |
| Scpharmaceuticals Inc. | $45.71 | 1 |
| Amgen Inc. | $27.79 | 1 |
What the 2025 payments were for
- Food and Beverage$571.76 · 13 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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