Dr. Mark W. Hennon, MD

Dr. Hennon practices at Roswell Park Cancer Institute in Los Angeles, California.

Dr. Hennon's NPI, 1124108998, was assigned on October 16, 2006. Dr. Hennon graduated from University at Buffalo School of Medicine in 2002. Dr. Hennon holds New York license 256860.

Dr. Hennon's primary practice is Roswell Park Cancer Institute, at 344 S Hauser Blvd, Los Angeles, CA 90036 in Los Angeles County. The practice phone is (716) 845-2300.

Dr. Hennon's primary practice is Roswell Park Cancer Institute in Los Angeles, California. Dr. Hennon is also affiliated with Roswell Park Comprehensive Cancer Center. The medical group on file is Roswell Park Comprehensive Cancer Center. Dmand AI also links Dr. Hennon to 1 more medical group, named with a free account.

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

Thoracic surgery (cardiothoracic vascular surgery) is Dr. Hennon's primary specialty in the NPI Registry, under taxonomy code 208G00000X. Dmand AI has Dr. Hennon's licenses on file in 2 states: New York and Pennsylvania.

CMS data shows 83 Medicare services from Dr. Hennon across 5 procedure codes in 2024, for 95 Medicare patients. Medicare paid $7,643 for them. Every service was in a facility, such as a hospital, rather than an office.

CMS counts 95 Medicare patients who saw Dr. Hennon in 2024. The largest group is 65 to 74, with 47 patients. 75% of them have high cholesterol, and 74% have high blood pressure. 21% are also on Medicaid. Their average risk score is 2.01, 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. Hennon's median patient age at 71, with 55% women.

In 2024, Dr. Hennon wrote 16 Medicare Part D claims. 100% of them were for generic drugs. CMS names the drug for 13 of them, across 1 drug with 11 or more claims each, at $45 in total drug cost. In 2022, CMS named 51 claims across 2 drugs.

Dr. Hennon accepts Medicare assignment, so Medicare's approved amount is taken as full payment.

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

Dmand AI links 48 papers to Dr. Hennon, published from 2011 to 2023. 2017 was the busiest year, with 5. The most frequent topics are Lung Neoplasms, Carcinoma, Non-Small-Cell Lung and Pneumonectomy. Dr. Hennon has published most often in J Thorac Dis. Dr. Hennon's most frequent co-authors are Todd Demmy, MD, Chukwumere E. Nwogu, MD and Elisabeth U. Dexter, MD.

CMS Open Payments shows 27 general payments to Dr. Hennon from 5 drug and device companies from 2016 to 2025. Travel and lodging make up the largest share, 66% of the total. Intuitive Surgical, Inc. paid the most, $3,622.

Dr. Hennon graduated from University at Buffalo School of Medicine in 2002.