John Marshall Robertson, MD
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Santa Monica, CA
John Marshall Robertson, MD is a thoracic surgery (cardiothoracic vascular surgery) physician with a practice address in Santa Monica, California, and NPI 1689760480, issued on Oct 5, 2006. Check the license (California G38174, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- John Marshall Robertson
- Credential
- MD
- Primary taxonomy
- Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician 208G00000X
- License number
- G38174 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2121 Santa Monica Blvd, Santa Monica, CA 90404
- Phone
- (310) 829-8618
- Enumerated
- Oct 5, 2006
- Record last updated
- Apr 19, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (310) 829-8607
- Medicare enrollment
- Enrolled (PECOS I20100126000070); accepts Medicare assignment
- Medical or professional school
- Saint Louis University School Of Medicine, 1977
- Entity
- Type 1 · individual
8 nearest thoracic surgery (cardiothoracic vascular surgery) physician records → All 634 in California → Look up another NPI →
Also registered at 2121 Santa Monica Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Anabelle AhdootRegistered Dietitian1396283263
- Katiuscha Almeida Merath Reis, MDSurgery Physician1861055626
- Sandra Andrews, RD, CDERegistered Dietitian1427347954
- Maia Aronson, P.A.Physician Assistant1861762882
- Daniel ArtensteinStudent in an Organized Health Care Education/Training Program1023402310
- Bita Azizi, RDRegistered Dietitian1861797839
Verify John Marshall Robertson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G38174Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $60.74
2 payments; by number, the most common kind was food and beverage; the largest payer was Edwards Lifesciences Corporation. The 4,047 providers of this specialty with any payment received $7,828.84 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
- Providence Saint Johns Medical FoundationSanta Monica, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Marshall Robertson among 634 thoracic surgery (cardiothoracic vascular surgery) physician records in California
John Marshall Robertson, MD is one of 634 thoracic surgery (cardiothoracic vascular surgery) physician records with a practice address in California. 75% 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, 45% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated1977 · median 1997 among the 408 with a school on file
- Record last updated2021 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208G00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician providers in California
There are 634 thoracic surgery (cardiothoracic vascular surgery) physician records in California.
All 634 in California → Every provider in Santa Monica → Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician nationwide →
The 8 thoracic surgery (cardiothoracic vascular surgery) physician records with the nearest ZIP codes
- Manuel Estioko, MDSanta Monica, CA 904041326144601
- Robert McKenna, M.D.Santa Monica, CA 904041942210117
- James Zalez, MDSanta Monica, CA 904041679689822
- Philippe Lemoine, MDSanta Monica, CA 904031609878123
- Kathy Magliato, MDSanta Monica, CA 904051174629455
- Kelsey Gray, M.D.Torrance, CA 905021912348293
- Timothy Vannatta, MDTorrance, CA 905021255324885
- Joseph Carey, M.D.Torrance, CA 905031912081332
Common questions
What is John Marshall Robertson, MD's NPI number?
John Marshall Robertson, MD's National Provider Identifier (NPI) is 1689760480, issued on Oct 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Marshall Robertson, MD located?
The NPPES record lists a practice address at 2121 Santa Monica Blvd, Santa Monica, CA, 90404. Phone: (310) 829-8618. Providers update this record themselves, so call before visiting.
How can I verify John Marshall Robertson, MD's license?
NPPES lists California license number G38174, 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.
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.