Andrew Gregory Ross, M.D.
Internal Medicine, Nephrology (M.D.) with Santa Barbara County Auditor and 2 other groups, practicing in Orange, California. Their prescriptions cost Medicare Part D more than their services did: $1,075,985 for 2,879 claims, against $402,818 paid for services in 2024. Amgen Inc. was the largest of 18 companies reporting payments in 2025, $2,551 in all, mostly food and beverage. Lists French Hospital Medical Center and 4 other hospitals as hospital affiliations. A record with the same name and state is on the OIG exclusion list; it carries no NPI, so check it before acting.
Overview
| NPI | 1932543998 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Apr 22, 2013 |
| Last updated in NPPES | Apr 14, 2017 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | A139763 | CA |
| Student in an Organized Health Care Education/Training Program | 390200000X | — | — |
Exclusion screening
Possible match: verify before acting. The OIG list has a record with the same name in California, but that record carries no NPI, so it may be a different person or business.
| Matched by | Name on OIG list | Exclusion type | Excluded since | Location |
|---|---|---|---|---|
| Name + state | Andrew Raymond Ross · Therapist | 1128a3 | May 20, 2018 | Healdsburg, CA |
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | Possible (name) | See above |
| 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 (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 765 |
|---|---|
| Services billed | 3,217 across 30 procedure codes |
| Paid by Medicare | $402,818 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,879 · 6,771 30-day fills |
|---|---|
| Patients | 387 |
| Total drug cost | $1,075,985 |
| Generic share | 68% of claims |
Education and affiliations
| Graduation year | 2013 |
|---|---|
| Medicare specialty | Nephrology |
| Telehealth | Offers telehealth |
Medical groups
- Santa Barbara County AuditorSanta Barbara, CA · 97 clinicians
- Lompoc Valley Medical CenterLompoc, CA · 91 clinicians
- Santa Barbara Nephrology, Inc.Santa Barbara, CA · 2 clinicians
Hospital affiliations
- French Hospital Medical CenterSan Luis Obispo, CA
- Goleta Valley Cottage HospitalSanta Barbara, CA
- Lompoc Valley Medical CenterLompoc, CA
- Marian Regional Medical CenterSanta Maria, CA
- Santa Barbara Cottage HospitalSanta Barbara, CA
Other facilities
- Lompoc Artificial Kidney Center, LLCDialysis facility · Lompoc, CA
- Santa Barbara Artificial Kidney Center, LLCDialysis facility · Santa Barbara, CA
Industry payments (Open Payments)
- 2025$2,551 · 89 payments from 18 companies
- 2024$2,410 · 96 payments from 18 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $609.17 | 11 |
| Astrazeneca Pharmaceuticals LP | $503.99 | 20 |
| Aurinia Pharma U.S., Inc. | $241.27 | 6 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $178.17 | 9 |
| Otsuka America Pharmaceutical, Inc. | $163.17 | 8 |
What the 2025 payments were for
- Food and Beverage$2,551 · 89 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 40 nephrologists in Orange · All nephrologists in California