Dr. Ron S. Gejman, MD, PhD

Dr. Gejman practices at Trustees Of Columbia University In The City Of New York - Primary Care - New York (177 Fort Washington Ave) in New York, New York.

Dr. Gejman's NPI, 1811523848, was assigned on March 21, 2020. Dr. Gejman holds New York license 323560.

Dr. Gejman's primary practice is Trustees of Columbia University in the City of New York - Primary Care - New York (177 Fort Washington Ave), at 177 Fort Washington Ave Fl 7 Fl 7, New York, NY 10032. The practice phone is (212) 305-4134. The NPI Registry lists Dr. Gejman's practice address as 130 W Kingsbridge Rd, Bronx, NY 10468.

Dr. Gejman's primary practice is Trustees Of Columbia University In The City Of New York - Primary Care - New York (177 Fort Washington Ave) in New York, New York. The medical group on file is ColumbiaDoctors.

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

Internal medicine is Dr. Gejman's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Gejman is licensed in New York.

In 2024, Dr. Gejman wrote 99 Medicare Part D claims for 33 patients. 89% of them were for generic drugs. CMS names the drug for 28 of them, across 2 drugs with 11 or more claims each, at $401 in total drug cost. In 2023, CMS named 112 claims across 8 drugs.

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

Dmand AI links 13 papers to Dr. Gejman, published from 2015 to 2025. 2016 was the busiest year, with 3. The most frequent topics are Cell Line, Tumor, CD8-Positive T-Lymphocytes and Disease Models, Animal. Dr. Gejman has published most often in Cancer Immunol Res. Dr. Gejman's most frequent co-authors are David A. Scheinberg, MD, Toni K. Choueiri, MD and Jonathan Andrew Coleman, MD.