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Edit this profileAt a glance
- 200 W Arbor Dr, San Diego, CA 92103
About Dr. Onaitis
Based in San Diego, CA, Mark W. Onaitis, MD is listed in the NPI registry under thoracic surgery. Mark graduated from Duke University School of Medicine in 1997. Mark is also listed as specializing in thoracic surgery (cardiothoracic). According to Medicare claims data, Mark cared for 170 Medicare patients across 181 services. The services billed most often include new patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more, removal of lymph nodes of chest cavity using an endoscope, and established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more. NPI 1841310638 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
- (858) 657-7777
- Email not available
Practice Locations
200 W ARBOR DR
San Diego, CA 92103
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
181 services · 170 patients · 8 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Removal of lymph nodes of chest cavity using an endoscope | Procedure | 32674 |
34 | More often than most peers in Thoracic Surgery |
| Removal of segment of lung tissue using an endoscope | Procedure | 32669 |
23 | More often than most peers in Thoracic Surgery |
| Exam of lung with removal of lung lobe using an endoscope | Procedure | 32663 |
11 | Less often than most peers in Thoracic Surgery |
| 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 |
38 | As often as other peers in Thoracic Surgery |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
25 | More often than most peers in Thoracic Surgery |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
19 | More often than most peers in Thoracic Surgery |
| New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more | Office visit | 99204 |
19 | Less often than most peers in Thoracic Surgery |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
12 | Less often than most peers in Thoracic Surgery |
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.
Related specialists at this location 2
Clinically related specialties at the same address — the people this provider most likely works alongside.
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 San Diego 8
Same specialty, same city.
More connections — 23 related providers in 3 groups
Trained at Duke University School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 1997 at Duke University School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Removal of lymph nodes of chest cavity using an endoscope 7
Providers in CA who bill this service to Medicare most often.
Common questions
What kind of doctor is Dr. Onaitis?
Dr. Onaitis is a thoracic surgeon in San Diego, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Thoracic Surgery”.
NPI registry
What is Dr. Onaitis's address?
Dr. Onaitis is listed at 200 W Arbor Dr, San Diego, CA 92103. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Dr. Onaitis?
The number on file is (858) 657-7777. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Dr. Onaitis's NPI number?
Dr. Onaitis's National Provider Identifier is 1841310638. 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. Onaitis train?
Dr. Onaitis attended Duke University School of Medicine, graduating in 1997. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Onaitis been practicing?
Dr. Onaitis has 29 years experience. Calculated from a graduation year of 1997, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dr. Onaitis perform?
According to Medicare billing data, Dr. Onaitis performs procedures including removal of lymph nodes of chest cavity using an endoscope, removal of segment of lung tissue using an endoscope and exam of lung with removal of lung lobe 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. Onaitis confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Onaitis. If this is you, claiming it is free.
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