Physician Profile
Gregory Fontana, M.D.
Unclaimed ProfileAbout 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.
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
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
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
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
- Floppy Windpipe
- Hole Between Windpipe and Food Pipe
- Narrowed windpipe
- Windpipe Cancer
Chest tumors
- Mass between the lungs
- Thymus tumor
Chest wall
- Broken ribs
- Chest wall tumor
- Pigeon chest
- Slipping Rib Syndrome
- Sunken chest
Diaphragm
- Diaphragmatic hernia
- Paralyzed diaphragm
Esophagus
- Esophagus Spasms
Esophagus and stomach
- Acid reflux
- Barrett's esophagus
- Esophageal cancer
- Esophageal pouch
- Esophagus tear
- Hiatal hernia
- Swallowing difficulties
Heart lining
- Pericardial effusion
Infection
- Deep Chest Infection
Lung
- Bronchiectasis
- Congenital Lung Malformation
- Lung Bullae
- Persistent Air Leak
- Pulmonary fibrosis
Lung cancer
- Cancer Spread to the Lung
- Lung cancer
- Mesothelioma
Lung conditions
- Collapsed lung
- COPD
- Coughing up blood
- Fluid around the lungs
- Lung abscess
- Suspicious Lung Spot
Nerves
- Severe Facial Blushing
Nerves and blood vessels
- Thoracic outlet syndrome
Neuromuscular
- Myasthenia gravis
Pleural disease
- Asbestos lung damage
- Lymph Fluid Leak in Chest
Sweating disorders
- Excessive sweating
- Excessive underarm sweating
Trauma
- Broken Breastbone
Vascular
- Blocked Chest Vein
Procedures & services
Airway
- Surgical Tracheostomy
Airway surgery
- Airway surgery
- Windpipe stent placement
Chest tumors
- Chest tumor removal
- Thymus removal surgery
Chest wall
- Pigeon Chest Repair
- Slipping Rib Surgery
Chest wall surgery
- Broken rib plating surgery
- Chest wall reconstruction
- Sunken chest repair
- Thoracic Outlet Decompression
Diagnostic tests
- Bronchoscopy
- Needle biopsy of lung
Diagnostics
- EBUS lung biopsy
- Robotic Navigational Bronchoscopy
- Surgical Lung Biopsy
Diaphragm
- Diaphragm Pacemaker Implantation
Diaphragm surgery
- Diaphragm repair surgery
Emphysema
- Lung Volume Reduction Surgery
Esophagus
- Achalasia Surgery
- Esophageal Pouch Surgery
Esophagus surgery
- Acid reflux surgery
- Esophageal dilation
- Esophageal stent placement
- Esophagus removal surgery
- Hiatal hernia surgery
- Peroral endoscopic myotomy
Fluid drainage
- Chest tube insertion
- Draining lung fluid
- Permanent chest drain insertion
- Pleural sealing procedure
Heart lining
- Heart Fluid Drainage (Pericardiocentesis)
- Pericardial Window Surgery
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
- Surgery for Facial Blushing
Pleural disease
- Chest Lymph Duct Ligation
Robotic surgery
- Robotic chest surgery
Surgical approach
- Open Chest Surgery
Sweat surgery
- Surgery for sweaty hands
Transplant
- Lung Transplant
Trauma
- Broken Breastbone Surgery
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. Guide.md cannot book appointments or pass on messages — please call the office directly.
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
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.