Bruce Abraham Greenfield, M.D.
Nephrology Physician · Los Angeles, CA
Bruce Abraham Greenfield, M.D. is a nephrology physician with a practice address in Los Angeles, California, and NPI 1043224686, issued on Jul 28, 2006. Check the license (California G46615, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Bruce Abraham Greenfield
- Credential
- M.D.
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- G46615 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1400 S Grand Ave, Los Angeles, CA 90015
- Phone
- (213) 748-1414
- Enumerated
- Jul 28, 2006
- Record last updated
- Jul 9, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (213) 749-4021
- Medicaid ID
- 00G466150 CA
- Medicare enrollment
- Enrolled (PECOS I20040401000853); accepts Medicare assignment
- Medical or professional school
- Albert Einstein College Of Medicine Of Yeshiva University, 1980
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 1,468 in California → Look up another NPI →
Also registered at 1400 S Grand Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Ali Amini, M.D.Internal Medicine Physician1528251386
- Armaity Austin, M.D, M.P.H, FAAFPFamily Medicine Physician1558348946
- Farid Besharat, M.D.Pulmonary Disease Physician1366548620
- Harvey Brown, MDPulmonary Disease Physician1235111717
Verify Bruce Abraham Greenfield in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G46615Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
78% more Medicare Part D claims than the average nephrology physician in 2024
2,615 Medicare Part D claims for 379 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. Brand-name drugs were 30% of claims. 18 claims were for opioids.
Most prescribed
- Farxiga151 claims
- Furosemide143 claims
- Sevelamer Carbonate127 claims
- Amlodipine Besylate104 claims
- Kerendia93 claims
- Losartan Potassium93 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $1,138.69
42 payments; by number, the most common kind was food and beverage; the largest payer was Alexion Pharmaceuticals, Inc. The 8,230 providers of this specialty with any payment received $3,091.37 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Premier Nephrology Medical Group IncLos Angeles, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Bruce Abraham Greenfield among 1,468 nephrology physician records in California
Bruce Abraham Greenfield, M.D. is one of 1,468 nephrology physician records with a practice address in California. 88% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 10% of them.
- NPI issued2006 · 10% of these records are older, 48% newer
- In a Medicare fileYes · 88% of these records are
- In the CMS Doctors and Clinicians fileYes · 77% of these records are
- Graduated1980 · median 2001 among the 1,128 with a school on file
- Record last updated2007 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RN0300X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in California
There are 1,468 nephrology physician records in California.
All 1,468 in California → Every provider in Los Angeles → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Jonathan Cheng, MDLos Angeles, CA 900151538600887
- Grace ChoiLos Angeles, CA 900151831585074
- Kim Le, M.D.Los Angeles, CA 900151780698340
- Luani Lee, M.D.Los Angeles, CA 900151073747135
- Ardavan Mashhadian, D.O.Los Angeles, CA 900151003132523
- Leon Rovner, M.D.Los Angeles, CA 900151811013766
- Irene Toh, M.D.Los Angeles, CA 900151679613863
- Lin WangLos Angeles, CA 900151366974859
Common questions
What is Bruce Abraham Greenfield, M.D.'s NPI number?
Bruce Abraham Greenfield, M.D.'s National Provider Identifier (NPI) is 1043224686, issued on Jul 28, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Bruce Abraham Greenfield, M.D. located?
The NPPES record lists a practice address at 1400 S Grand Ave, Los Angeles, CA, 90015. Phone: (213) 748-1414. Providers update this record themselves, so call before visiting.
How can I verify Bruce Abraham Greenfield, M.D.'s license?
NPPES lists California license number G46615, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Bruce Abraham Greenfield, M.D. prescribe under Medicare Part D?
In 2024, Bruce Abraham Greenfield, M.D. had 2,615 Medicare Part D claims for 379 beneficiaries; the average among nephrology physician prescribers was 1,465. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.