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Edit this profileAt a glance
- 818 Congress St, Portland, ME 04102
About Dr. Hassan
Based in Portland, ME, Ansar Hassan, MD is listed in the NPI registry under thoracic surgery (cardiothoracic). According to Medicare claims data, Ansar cared for 88 Medicare patients across 89 services. The services billed most often include coronary artery bypass using artery graft, 1 graft, replacement of aortic valve through the skin and femoral artery, and harvest of vein using an endoscope. NPI 1689859332 identifies this record in the national registry.
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
- (207) 773-8161
- Email not available
Is this your home address or personal number? Hide it
Practice Locations
818 CONGRESS ST
Portland, ME 04102
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
- Bronchoscopy
- Needle biopsy of lung
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
89 services · 88 patients · 6 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Coronary artery bypass using artery graft, 1 graft | Procedure | 33533 |
17 | As often as other peers in Thoracic Surgery (Cardiothoracic) |
| Replacement of aortic valve through the skin and femoral artery | Procedure | 33361 |
17 | Less often than most peers in Thoracic Surgery (Cardiothoracic) |
| Harvest of vein using an endoscope | Procedure | 33508 |
16 | Less often than most peers in Thoracic Surgery (Cardiothoracic) |
| Replacement of mitral valve on heart-lung machine | Procedure | 33430 |
15 | As often as other peers in Thoracic Surgery (Cardiothoracic) |
| Exposure of major groin artery with creation of conduit | Procedure | 34714 |
13 | Too few peers to compare |
| New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more | Office visit | 99204 |
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.
Other thoracic surgery specialists at this location 3
Same specialty, same street address — most likely the same department or group.
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 Portland 5
Same specialty, same city.
More connections — 20 related providers in 3 groups
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 1998 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 4
Providers in ME who bill this service to Medicare most often.
Common questions
What is Dr. Hassan's specialty?
Dr. Hassan is a thoracic surgery (cardiothoracic) in Portland, ME. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where can I find Dr. Hassan?
Dr. Hassan is listed at 818 Congress St, Portland, ME 04102. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Hassan?
The number on file is (207) 773-8161. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Dr. Hassan's NPI number?
Dr. Hassan's National Provider Identifier is 1689859332. 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. Hassan's medical education?
Dr. Hassan attended Other, graduating in 1998. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Hassan been practicing?
Dr. Hassan has 28 years experience. Calculated from a graduation year of 1998, reported in the CMS National Downloadable File.
CMS public data
What is Dr. Hassan known for?
According to Medicare billing data, Dr. Hassan performs procedures including coronary artery bypass using artery graft, 1 graft, replacement of aortic valve through the skin and femoral artery and harvest of vein using an endoscope, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Hassan confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Hassan. If this is you, claiming it is free.
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