Physician Profile
Unclaimed ProfileAbout Dr. Robertson
John Marshall Robertson, MD is a healthcare provider in Santa Monica, CA specializing in thoracic surgery. John trained at Saint Louis University School of Medicine, graduating in 1977. John is also listed as specializing in thoracic surgery (cardiothoracic). According to Medicare claims data, John cared for 48 Medicare patients across 48 services.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (310) 829-8618
- Email not available
Practice Locations
2121 SANTA MONICA BLVD
Santa Monica, CA 90404
Procedures Most Often Billed to Medicare
48 services · 48 patients · 2 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Replacement of aortic valve through the skin and femoral artery | Procedure | 33361 |
27 |
| New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more | Office visit | 99205 |
21 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other thoracic surgeons in Santa Monica 2
Same specialty, same city.
Trained at Saint Louis University School of Medicine 8
Other providers in the same specialty who trained at the same institution.
More connections — 16 related providers in 2 groups
Class of 1977 at Saint Louis University School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Replacement of aortic valve through the skin and femoral artery 8
Providers in CA who bill this service to Medicare most often.
Common questions
What does Dr. Robertson specialize in?
Dr. Robertson is a thoracic surgeon in Santa Monica, CA. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “THORACIC SURGERY”.
NPI registry
Where is Dr. Robertson located?
Dr. Robertson is listed at 2121 SANTA MONICA BLVD, Santa Monica, CA 90404. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Robertson's phone number?
The number on file is (310) 829-8618. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Robertson's NPI number?
Dr. Robertson's National Provider Identifier is 1689760480. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Robertson go to medical school?
Dr. Robertson attended Saint Louis University School of Medicine, graduating in 1977. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Robertson been practicing?
Dr. Robertson has 49 years experience. Calculated from a graduation year of 1977, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Robertson do most often?
According to Medicare billing data, Dr. Robertson performs procedures including replacement of aortic valve through the skin and femoral artery, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Robertson confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Robertson. If this is you, claiming it is free.
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Claim this profileProvider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.