Are you Gregory Fontana, M.D.? This profile is yours to edit: update your address, phone, photo and services.
Edit this profileAt a glance
- 215 W Janss Rd, Thousand Oaks, CA 91360
About Dr. Fontana
Gregory Fontana, M.D. is a healthcare provider in Thousand Oaks, CA specializing in thoracic surgery (cardiothoracic). Gregory trained at University of California, Geffen School of Medicine, graduating in 1984. According to Medicare claims data, Gregory cared for 325 Medicare patients across 361 services. The services billed most often include established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more, replacement of aortic valve through the skin and femoral artery, and established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more. This provider record is associated with NPI 1508840570.
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
Is this your home address or personal number? Hide it
Practice Locations
215 W JANSS RD
Thousand Oaks, CA 91360
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
361 services · 325 patients · 9 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Replacement of aortic valve through the skin and femoral artery | Procedure | 33361 |
58 | More often than most peers in Thoracic Surgery (Cardiothoracic) |
| Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more | Office visit | 99215 |
119 | More than most peers in Thoracic Surgery (Cardiothoracic) |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
55 | More often than most 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 |
32 | As often as other peers in Thoracic Surgery (Cardiothoracic) |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | Office visit | 99232 |
30 | As often as other peers in Thoracic Surgery (Cardiothoracic) |
| Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | Office visit | 99223 |
21 | As often as other peers in Thoracic Surgery (Cardiothoracic) |
| New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more | Office visit | 99204 |
21 | As often as other peers in Thoracic Surgery (Cardiothoracic) |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | Office visit | 99233 |
14 | Less often than most peers in Thoracic Surgery (Cardiothoracic) |
| Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | Office visit | 99222 |
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 University of California, Geffen School of Medicine 8
Other providers in the same specialty who trained at the same institution.
More connections — 15 related providers in 2 groups
Class of 1984 at University of California, Geffen 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 7
Providers in CA who bill this service to Medicare most often.
Common questions
What kind of doctor is Gregory Fontana?
Gregory Fontana is a thoracic surgery (cardiothoracic) in Thousand Oaks, CA. That is the designation recorded for this NPI in the federal registry.
NPI registry
What is Gregory Fontana's address?
Gregory Fontana is listed at 215 W Janss Rd, Thousand Oaks, CA 91360. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Gregory Fontana?
The number on file is (805) 852-9100. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Gregory Fontana's NPI number?
Gregory Fontana's National Provider Identifier is 1508840570. 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 Gregory Fontana train?
Gregory Fontana attended University of California, Geffen School of Medicine, graduating in 1984. This comes from the CMS National Downloadable File.
CMS public data
How long has Gregory Fontana been practicing?
Gregory Fontana has 42 years experience. Calculated from a graduation year of 1984, reported in the CMS National Downloadable File.
CMS public data
What procedures does Gregory Fontana perform?
According to Medicare billing data, Gregory Fontana 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 Gregory Fontana confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Gregory Fontana. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.