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Edit this profileWhere to find Simon Maltais, MD
- Thousand Oaks location main office
227 W Janss Rd Ste 340, Thousand Oaks, CA 91360 - Marshfield location
1000 N Oak Ave, Marshfield, WI 54449
About Dr. Maltais
Simon Maltais, MD practices thoracic surgery (cardiothoracic) in Thousand Oaks, CA. Simon is also listed as specializing in vascular surgery. Medicare claims data shows Simon provided 29 services to 29 patients. The services billed most often include coronary artery bypass using artery graft, 1 graft and new patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more. The provider's National Provider Identifier (NPI) is 1457665911.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (805) 852-9100
- Email not available
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Practice Locations
227 W JANSS RD STE 340
Thousand Oaks, CA 91360
1000 N Oak Ave
Marshfield, WI 54449
Conditions Commonly Evaluated or Treated
Within Thoracic Surgery generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Airway
Chest tumors
Chest wall
Diaphragm
Esophagus
Esophagus and stomach
- Acid reflux
- Barrett's esophagus
- Esophageal cancer
- Esophageal pouch
- Esophagus tear
- Hiatal hernia
- Swallowing difficulties
Heart lining
Infection
Lung
Lung cancer
Lung conditions
Nerves
Nerves and blood vessels
Neuromuscular
Pleural disease
Sweating disorders
Trauma
Vascular
Procedures & services
Airway
Airway surgery
Chest tumors
Chest wall
Chest wall surgery
- Broken rib plating surgery
- Chest wall reconstruction
- Sunken chest repair
- Thoracic Outlet Decompression
Diagnostic tests
Diagnostics
Diaphragm
Diaphragm surgery
Emphysema
Esophagus
Esophagus surgery
- Acid reflux surgery
- Esophageal dilation
- Esophageal stent placement
- Esophagus removal surgery
- Hiatal hernia surgery
- Peroral endoscopic myotomy
Fluid drainage
Heart lining
Lung surgery
- Collapsed lung surgery
- Lung cancer surgery
- Lung lining scraping and cleaning
- Lung nodule removal
- Lung valve placement for emphysema
- Minimally invasive lung surgery
Nerves
Pleural disease
Robotic surgery
Surgical approach
Sweat surgery
Transplant
Trauma
Procedures Most Often Billed to Medicare
29 services · 29 patients · 2 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Coronary artery bypass using artery graft, 1 graft | Procedure | 33533 |
18 | As often as other peers in Thoracic Surgery (Cardiothoracic) |
| 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 |
11 | Less often than most peers in Thoracic Surgery (Cardiothoracic) |
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 surgery specialists in Thousand Oaks 7
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
More connections — 16 related providers in 2 groups
Class of 2003 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs Coronary artery bypass using artery graft, 1 graft 8
Providers in CA who bill this service to Medicare most often.
Common questions
What is Dr. Maltais's specialty?
Dr. Maltais is a thoracic surgery (cardiothoracic) in Thousand Oaks, CA. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where can I find Dr. Maltais?
Dr. Maltais is listed at 227 W Janss Rd Ste 340, Thousand Oaks, CA 91360. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Maltais?
The number on file is (805) 852-9100. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Dr. Maltais?
Dr. Maltais's National Provider Identifier is 1457665911. 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
What is Dr. Maltais's medical education?
Dr. Maltais attended Other, graduating in 2003. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Maltais have?
Dr. Maltais has 23 years experience. Calculated from a graduation year of 2003, reported in the CMS National Downloadable File.
CMS public data
What is Dr. Maltais known for?
According to Medicare billing data, Dr. Maltais performs procedures including coronary artery bypass using artery graft, 1 graft, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Maltais's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Maltais. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.