Robert C. Rennert, M.D.
Neurological Surgery Physician · Los Angeles, CA
Robert C. Rennert, M.D. is a neurological surgery physician with a practice address in Los Angeles, California, and NPI 1477966851, issued on Jun 3, 2014. Check the license (California A139629, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Robert C. Rennert
- Credential
- M.D.
- Primary taxonomy
- Neurological Surgery Physician 207T00000X
- License numbers
- A139629 CA
12236684-1205 UT
Self-reported in NPPES; status is on the state search - Practice location
- 1520 San Pablo St Ste 3800, Los Angeles, CA 90033
- Phone
- (323) 442-5720
- Enumerated
- Jun 3, 2014
- Record last updated
- May 2, 2023
- Medicare enrollment
- Enrolled (PECOS I20210726002960); accepts Medicare assignment
- Medical or professional school
- Ohio State University College Of Medicine, 2014
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest neurological surgery physician records → All 929 in California → Look up another NPI →
Also registered at 1520 San Pablo St Ste 3800
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Andrew Brunswick, M.D.Neurological Surgery Physician1578823407
- Jessica Campos, MDNeurological Surgery Physician1841732294
- David Cheng, M.D.Pain Medicine (Physical Medicine & Rehabilitation) Physician1316114119
- Sarah Cho, PA-CPhysician Assistant1427619576
- Tatsuhiro Fujii, M.D.Neurological Surgery Physician1538605241
- Mahshid GhazaryanNurse Practitioner1548180789
Verify Robert C. Rennert in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A139629Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
65% fewer Medicare Part D claims than the average neurological surgery physician in 2024
61 Medicare Part D claims for 16 beneficiaries, against an average of 172 among the 4,378 providers of this specialty who prescribed in Part D. Brand-name drugs were 21% of claims.
Most prescribed
- Nafcillin Sodium13 claims
- Levetiracetam11 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: $1,970.03
18 payments; by number, the most common kind was food and beverage; the largest payer was Medtronic, Inc. The 5,377 providers of this specialty with any payment received $14,925.58 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
- University OF Utah Surgical ServicesSalt Lake City, UT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Robert C. Rennert among 929 neurological surgery physician records in California
Robert C. Rennert, M.D. is one of 929 neurological surgery physician records with a practice address in California. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2014, is newer than 76% of them.
- NPI issued2014 · 76% of these records are older, 20% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2014 · median 2005 among the 612 with a school on file
- Record last updated2023 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207T00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Neurological Surgery Physician providers in California
There are 929 neurological surgery physician records in California.
All 929 in California → Every provider in Los Angeles → Neurological Surgery Physician nationwide →
The 8 neurological surgery physician records with the nearest ZIP codes
- Arun Amar, MDLos Angeles, CA 900331447348032
- Michael Apuzzo, M.D.Los Angeles, CA 900331720027501
- Frank Attenello, M.D., M.S.Los Angeles, CA 900331386818227
- Thomas Chen, M.D., PHDLos Angeles, CA 900331225071509
- Steven Giannotta, M.D.Los Angeles, CA 900331114978871
- John Gruen, M.D.Los Angeles, CA 900331194769570
- Patrick Hsieh, MDLos Angeles, CA 900331942405956
- Charles Liu, M.D., PHDLos Angeles, CA 900331568406080
Common questions
What is Robert C. Rennert, M.D.'s NPI number?
Robert C. Rennert, M.D.'s National Provider Identifier (NPI) is 1477966851, issued on Jun 3, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Robert C. Rennert, M.D. located?
The NPPES record lists a practice address at 1520 San Pablo St Ste 3800, Los Angeles, CA, 90033. Phone: (323) 442-5720. Providers update this record themselves, so call before visiting.
How can I verify Robert C. Rennert, M.D.'s license?
NPPES lists California license number A139629, 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 C. Rennert, M.D. prescribe under Medicare Part D?
In 2024, Robert C. Rennert, M.D. had 61 Medicare Part D claims for 16 beneficiaries; the average among neurological surgery physician prescribers was 172. 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.