Dr. Jeffrey A. Barnes, MD, PhD

Dr. Barnes practices at Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham.

Dr. Barnes' NPI, 1326238411, was assigned on July 26, 2007. Dr. Barnes graduated from University of Illinois College of Medicine - Chicago in 2004. Dr. Barnes holds Massachusetts license 233635.

Dr. Barnes' primary practice is Massachusetts General Hospital, at 55 Fruit Street, Boston, MA 02114 in Suffolk County. The practice phone is (617) 726-2000.

Dr. Barnes' primary practice is Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham. Dr. Barnes is also affiliated with Brigham and Women's Hospital. The medical group on file is Massachusetts General Hospital. Dmand AI also links Dr. Barnes to 4 more hospitals, 5 medical groups and 1 community health center, each named with a free account. Dr. Barnes' employer is on file too: a hospital.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Barnes practices, 7 sites in all. Vendor and product names are available with a free account.

Hematology and oncology is Dr. Barnes' primary specialty in the NPI Registry, under taxonomy code 207RH0003X. Dr. Barnes is board certified in hematology by the American Board of Internal Medicine. Dmand AI has Dr. Barnes' licenses on file in 3 states: Massachusetts, New Hampshire and Maine.

Dmand AI lists chronic anemia, chronic embolism thrombosis, chronic leukemia, lymphoma, multiple myeloma, prostate cancer and purpura and thrombocytopenia among the conditions Dr. Barnes treats.

CMS data shows 1,459 Medicare services from Dr. Barnes across 6 procedure codes in 2024, for 501 Medicare patients. Medicare paid $121,963 for them.

CMS counts 501 Medicare patients who saw Dr. Barnes in 2024. The largest group is 75 to 84, with 219 patients. 72% of them have high blood pressure, and 72% have high cholesterol. 12% 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. Barnes' median patient age at 77, with 39% women.

In 2024, Dr. Barnes wrote 366 Medicare Part D claims for 75 patients. 82% of them were for generic drugs. CMS names the drug for 294 of them, across 8 drugs with 11 or more claims each, at $742,677 in total drug cost. In 2023, CMS named 187 claims across 9 drugs.

Dr. Barnes accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Barnes as offering telehealth.

Dmand AI links 57 papers to Dr. Barnes, published from 2011 to 2025. 2025 was the busiest year, with 9. The most frequent topics are Antineoplastic Combined Chemotherapy Protocols, Rituximab and Lymphoma, Large B-Cell, Diffuse. Dr. Barnes has published most often in N Engl J Med. Dr. Barnes' most frequent co-authors are Jeremy S. Abramson, MD, Ephraim P. Hochberg, MD and Eric David Jacobsen, MD.

Dmand AI links Dr. Barnes to 6 clinical trials, 4 of them phase 2 studies. Conditions studied include Hodgkin Disease, Lymphoma, Non-Hodgkin and Dendritic Cell Sarcoma, Follicular. Dana-Farber Cancer Institute sponsors the most, 2. Open Payments lists research payments to Dr. Barnes that name 1 trial.

CMS Open Payments shows 4 general payments to Dr. Barnes from 4 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 72% of the total. Janssen Pharmaceuticals, Inc paid the most, $133. It also lists 11 research payments totaling $107,046 from 2016 to 2025, naming 1 clinical trial.

Dr. Barnes graduated from University of Illinois College of Medicine - Chicago in 2004.

Dr. Barnes is in network with 13 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Elevance. Medicare plans come from the most carriers, 10. Check the plan with the practice before a visit.