Dr. Mark Joseph Brennan, DO

Dr. Brennan practices at UHS Binghamton General Hospital in Binghamton, New York, part of United Health Services.

Dr. Brennan's NPI, 1174523443, was assigned on July 28, 2005. Dr. Brennan graduated from Philadelphia College of Osteopathic Medicine in 1994. Dr. Brennan holds New York license 217717.

Dr. Brennan's primary practice is UHS Binghamton General Hospital, at 10-42 Mitchell Avenue, Binghamton, NY 13903 in Broome County. The practice phone is (607) 763-6000. Dr. Brennan also practices at United Health Services Hospitals, 1042 Mitchell Ave, Binghamton, NY 13903.

Dr. Brennan's primary practice is UHS Binghamton General Hospital in Binghamton, New York, part of United Health Services. The medical group on file is UHS Wilson Medical Center. Dmand AI also links Dr. Brennan to 1 more group practice or clinic and 1 medical group, each named with a free account.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Brennan practices, 2 sites in all. Vendor and product names are available with a free account.

Vascular surgery is Dr. Brennan's primary specialty in the NPI Registry, under taxonomy code 2086S0129X. Dr. Brennan is licensed in New York.

CMS data shows 143 Medicare services from Dr. Brennan across 7 procedure codes in 2024, for 123 Medicare patients. Medicare paid $9,505 for them. Every service was in a facility, such as a hospital, rather than an office.

CMS counts 123 Medicare patients who saw Dr. Brennan in 2024. The largest group is 65 to 74, with 49 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 29% are also on Medicaid. Their average risk score is 3.75, 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. Brennan's median patient age at 74, with 43% women.

In 2024, Dr. Brennan wrote 71 Medicare Part D claims for 21 patients. 54% of them were for generic drugs. CMS names the drug for 54 of them, across 2 drugs with 11 or more claims each, at $21,303 in total drug cost. In 2023, CMS named 33 claims across 2 drugs.

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 96 out of 100 for Dr. Brennan for performance year 2024, reported as part of a group. Dr. Brennan accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 16 procedures of leg revascularization (restoring blood flow) by Dr. Brennan, more than 74% of the clinicians it reports for that procedure.

Removal of tissue: 1 to 10 procedures (CMS shows small counts as a range)

Varicose vein removal: 1 to 10 procedures (CMS shows small counts as a range)

CMS Open Payments shows 550 general payments to Dr. Brennan from 61 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 81% of the total. Boston Scientific Corporation paid the most, $5,900.

Dr. Brennan graduated from Philadelphia College of Osteopathic Medicine in 1994.