Dr. Mark William Onaitis, MD

Dr. Onaitis practices at UCSD Hillcrest Medical Center in San Diego, California.

Dr. Onaitis' NPI, 1841310638, was assigned on March 29, 2007. Dr. Onaitis graduated from Duke University School Of Medicine in 1997. Dr. Onaitis holds California license A144886.

Dr. Onaitis' primary practice is UCSD Hillcrest Medical Center, at 200 W Arbor Dr, San Diego, CA 92103 in San Diego County. The practice phone is (619) 543-6222.

Dr. Onaitis' primary practice is UCSD Hillcrest Medical Center in San Diego, California. Dr. Onaitis is also affiliated with Hillcrest Medical Center. The medical group on file is UC San Diego Health.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Onaitis practices. Vendor and product names are available with a free account.

Thoracic surgery (cardiothoracic vascular surgery) is Dr. Onaitis' primary specialty in the NPI Registry, under taxonomy code 208G00000X. Dr. Onaitis is board certified in thoracic and cardiac surgery by the American Board of Thoracic Surgery. Dmand AI has Dr. Onaitis' licenses on file in 2 states: California and North Carolina.

Dmand AI lists esophagus, stomach, or upper small intestine surgery and lung resection among the conditions Dr. Onaitis treats.

CMS data shows 181 Medicare services from Dr. Onaitis across 7 procedure codes in 2024, for 116 Medicare patients. Medicare paid $49,884 for them.

CMS counts 116 Medicare patients who saw Dr. Onaitis in 2024. The largest group is 65 to 74, with 62 patients. 75% of them have high cholesterol, and 66% have high blood pressure. 19% are also on Medicaid. Their average risk score is 1.89, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Dr. Onaitis' median patient age at 68, with 50% women.

In 2024, Dr. Onaitis wrote 38 Medicare Part D claims for 26 patients. 100% of them were for generic drugs. CMS names the drug for 21 of them, across 1 drug with 11 or more claims each, at $291 in total drug cost.

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 91 out of 100 for Dr. Onaitis for performance year 2024, reported as part of a group. Dr. Onaitis accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Onaitis as offering telehealth.

Upper gastrointestinal (GI) endoscopy for acid reflux: 1 to 10 procedures (CMS shows small counts as a range)

Dmand AI links 139 papers to Dr. Onaitis, published from 2004 to 2025. 2016 was the busiest year, with 14. The most frequent topics are Lung Neoplasms, Pneumonectomy and Carcinoma, Non-Small-Cell Lung. Dr. Onaitis has published most often in Ann Thorac Surg. Dr. Onaitis' most frequent co-authors are Thomas A. D'Amico, MD, Mark Francis Berry, MD and Matthew Galen Hartwig, MD.

CMS Open Payments shows 372 general payments to Dr. Onaitis from 19 drug and device companies from 2016 to 2025. Consulting fees make up the largest share, 55% of the total. Intuitive Surgical, Inc. paid the most, $144,156. It also lists 4 research payments totaling $804 in 2020.

Dmand AI lists 6 awards for Dr. Onaitis, most recently ACS Fellow in 2013.

Dr. Onaitis graduated from Duke University School Of Medicine in 1997. Dr. Onaitis is a member of AATS, ACS and STS.

Dr. Onaitis is in network with 15 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Elevance. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.