Robert James Preston, MD
Trauma Surgery Physician · Los Angeles, CA
Robert James Preston, MD is a trauma surgery physician with a practice address in Los Angeles, California, and NPI 1538336581, issued on May 9, 2008. Check the license (California C134885, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Robert James Preston
- Credential
- MD
- Primary taxonomy
- Trauma Surgery Physician 2086S0127X
- License numbers
- C134885 CA
128134 NC
Self-reported in NPPES; status is on the state search - Practice location
- 2051 Marengo St, Los Angeles, CA 90033
- Phone
- (323) 865-1241
- Enumerated
- May 9, 2008
- Record last updated
- Mar 12, 2015 (not updated in 11 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20150507000935); accepts Medicare assignment
- Entity
- Type 1 · individual
Also registered at 2051 Marengo St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Helen AbolarinPsychiatric/Mental Health Nurse Practitioner1407551740
- Nawal AbouzahrStudent in an Organized Health Care Education/Training Program1881054104
- Shelby AdlerPsychiatry Physician1407432263
- Shalleymar AgitoRegistered Respiratory Therapist1649850694
- Adolfo AguilarCritical Care Registered Respiratory Therapist1053836999
- Ashley Allen, MDEmergency Medicine Physician1053751875
Verify Robert James Preston in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C134885Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
5.8 times the Medicare Part D claims of the average trauma surgery physician in 2024
280 Medicare Part D claims for 173 beneficiaries, against an average of 48 among the 447 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims. 44 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen43 claims
- Sulfamethoxazole-Trimethoprim35 claims
- Ibuprofen34 claims
- Albuterol Sulfate Hfa17 claims
- Meloxicam17 claims
- Cephalexin15 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.
Bills Medicare through 2 group practices
- Capital Hospitalist Medical Group IncLos Angeles, CA
- Vep Mlk Emergency Medical Group IncLos Angeles, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Trauma Surgery Physician providers in California
There are 146 trauma surgery physician records in California.
Other trauma surgery physician records in California
- Amir Amiri, M.D.Sacramento, CA1184605644
- Anthony Anagnostou, MDEureka, CA1427450568
- John Anderson, M.D.Sacramento, CA1184607921
- Zane Ashman, M.D.Loma Linda, CA1891137915
- Uma Bagga, M.D.Orange, CA1710207840
- Naveen BalanOakland, CA1669979134
- Shana Ballow, DOFresno, CA1275821936
- William Bandy, MDChico, CA1629080445
- Vishal Bansal, M.D.San Diego, CA1194889410
- Cristobal Barrios, MDOrange, CA1164624839
Common questions
What is Robert James Preston, MD's NPI number?
Robert James Preston, MD's National Provider Identifier (NPI) is 1538336581, issued on May 9, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Robert James Preston, MD located?
The NPPES record lists a practice address at 2051 Marengo St, Los Angeles, CA, 90033. Phone: (323) 865-1241. Providers update this record themselves, so call before visiting.
How can I verify Robert James Preston, MD's license?
NPPES lists California license number C134885, 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 Robert James Preston, MD prescribe under Medicare Part D?
In 2024, Robert James Preston, MD had 280 Medicare Part D claims for 173 beneficiaries; the average among trauma surgery physician prescribers was 48. 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.