Dr. Thomas Urban Marron, MD, PhD

Dr. Marron practices at The Mount Sinai Hospital in New York, New York, part of Mount Sinai Health System.

Dr. Marron's NPI, 1821363029, was assigned on March 21, 2012. Dr. Marron graduated from Icahn School Of Medicine At Mount Sinai in 2012. Dr. Marron holds New York license 272727.

Dr. Marron's primary practice is The Mount Sinai Hospital, at One Gustave L Levy Place, New York, NY 10029 in New York County. The practice phone is (212) 241-7981. Dr. Marron also practices at The Mount Sinai Hospital, 1 Gustave L Levy Pl, New York, NY 10029.

Dr. Marron's primary practice is The Mount Sinai Hospital in New York, New York, part of Mount Sinai Health System. The medical group on file is Mount Sinai Institute for Liver Medicine. Dmand AI also links Dr. Marron to 1 more group practice or clinic and 1 home health agency, each named with a free account.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Marron practices, 3 sites in all. Vendor and product names are available with a free account.

Medical oncology is Dr. Marron's primary specialty in the NPI Registry, under taxonomy code 207RX0202X. Dr. Marron is board certified in internal medicine by the American Board of Internal Medicine. Dmand AI has Dr. Marron's licenses on file in 2 states: New York and New Jersey.

Dmand AI lists breast cancer, colorectal cancer, lung cancer and neutropenia among the conditions Dr. Marron treats.

CMS data shows 203 Medicare services from Dr. Marron across 3 procedure codes in 2024, for 69 Medicare patients. Medicare paid $24,251 for them. Every service was in a facility, such as a hospital, rather than an office.

CMS counts 69 Medicare patients who saw Dr. Marron in 2024. The largest group is 65 to 74, with 31 patients. 70% of them have cancer, and 70% have high blood pressure. 26% are also on Medicaid. Their average risk score is 2.83, 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. Marron's median patient age at 69, with 53% women.

In 2024, Dr. Marron wrote 297 Medicare Part D claims for 43 patients. 77% of them were for generic drugs. CMS names the drug for 125 of them, across 6 drugs with 11 or more claims each, at $449,593 in total drug cost. In 2023, CMS named 90 claims across 5 drugs.

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

Dmand AI links 96 papers to Dr. Marron, published from 2009 to 2025. 2021 was the busiest year, with 17. The most frequent topics are Carcinoma, Hepatocellular, Liver Neoplasms and Immunotherapy. Dr. Marron has published most often in Nat Med. Dr. Marron's most frequent co-authors are Brian Doyle Brown, MD, Uqba Khan, MD and Tomi Jun.

Dmand AI links Dr. Marron to 12 clinical trials, 4 of them phase 1 studies. 7 are still active or recruiting. Conditions studied include Carcinoma, Non-Small-Cell Lung, Carcinoma, Bronchogenic and Carcinoma, Hepatocellular. Icahn School of Medicine at Mount Sinai sponsors the most, 3. Open Payments lists research payments to Dr. Marron that name 3 trials.

CMS Open Payments shows 191 general payments to Dr. Marron from 21 drug and device companies from 2016 to 2025. Consulting fees make up the largest share, 72% of the total. Abbvie Inc. paid the most, $37,285. It also lists 26 research payments totaling $51,086 from 2018 to 2025, naming 3 clinical trials.

Dr. Marron graduated from Icahn School Of Medicine At Mount Sinai in 2012.

Dr. Marron is in network with 16 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 10. Check the plan with the practice before a visit.