Bruce Abraham Greenfield, M.D.
NPI 1043224686ActiveIndividual· Internal Medicine, Nephrology· Los Angeles, CA
Internal Medicine, Nephrology (M.D.) in Los Angeles, California, trained at Albert Einstein College of Medicine of Yeshiva University (class of 1980). Their prescriptions cost Medicare Part D more than their services did: $1,333,271 for 2,615 claims, against $366,607 paid for services in 2024. Ardelyx, Inc. was the largest of 15 companies reporting payments in 2025, $1,924 in all, mostly food and beverage.
Overview
| NPI | 1043224686 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jul 28, 2006 |
| Last updated in NPPES | Jul 9, 2007 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | G46615 | CA |
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 (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 525 |
|---|---|
| Services billed | 2,715 across 26 procedure codes |
| Paid by Medicare | $366,607 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,615 · 3,899 30-day fills |
|---|---|
| Patients | 379 |
| Total drug cost | $1,333,271 |
| Generic share | 69% of claims |
Education and affiliations
| Medical school | Albert Einstein College of Medicine of Yeshiva University |
|---|---|
| Graduation year | 1980 |
| Medicare specialty | Nephrology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Premier Nephrology Medical Group IncLos Angeles, CA · 6 clinicians
Hospital affiliations
- California Hospital Medical Center laLos Angeles, CA
- Martin Luther King, Jr. Community HospitalLos Angeles, CA
- Pih Health Good Samaritan HospitalLos Angeles, CA
Other facilities
- Davita Avalon DialysisDialysis facility · Los Angeles, CA
- Davita Washington Plaza Dialysis CenterDialysis facility · Los Angeles, CA
- Usrc Gala DialysisDialysis facility · Los Angeles, CA
- Usrc Grand Avenue DialysisDialysis facility · Los Angeles, CA
- Usrc Grand HomeDialysis facility · Los Angeles, CA
- Ultra Health Services, Inc.Home health agency · Valley Village, CA
Industry payments (Open Payments)
- 2025$1,924 · 68 payments from 15 companies
- 2024$1,174 · 43 payments from 13 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Ardelyx, Inc. | $412.03 | 18 |
| Gastroklenz, Inc. DBA Cloudcath | $350.00 | 1 |
| Fresenius USA Marketing, Inc. | $298.56 | 13 |
| Bayer Healthcare Pharmaceuticals Inc. | $193.55 | 4 |
| Akebia Therapeutics Inc | $192.61 | 3 |
What the 2025 payments were for
- Food and Beverage$1,574 · 67 payments
- Consulting Fee$350.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other nephrologists in Los Angeles
- 1003132523
- 1003836602
- 1003924168
- 1003983982
- 1033670732
- 1043519341
- 1053512566
- 1053636977
- 1073747135
- 1093767337
- 1104944727
- 1154498178
All 202 nephrologists in Los Angeles · All nephrologists in California