Dr. Gregory Maurice Marcus, MD

Dr. Marcus practices at UCSF Helen Diller Medical Center at Parnassus Heights in San Francisco, California, part of University of California Health.

Dr. Marcus' NPI, 1891720579, was assigned on July 11, 2006. Dr. Marcus graduated from George Washington University School of Medicine and Health Sciences in 1998. Dr. Marcus holds California license A69390.

Dr. Marcus' primary practice is UCSF Helen Diller Medical Center at Parnassus Heights, at 505 Parnassus Ave, Box 0296, San Francisco, CA 94143 in San Francisco County. The practice phone is (415) 353-2733.

Dr. Marcus' primary practice is UCSF Helen Diller Medical Center at Parnassus Heights in San Francisco, California, part of University of California Health. The medical group on file is UCSF Pediatrics. Dmand AI also links Dr. Marcus to 3 more medical groups, each named with a free account.

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

Clinical cardiac electrophysiology is Dr. Marcus' primary specialty in the NPI Registry, under taxonomy code 207RC0001X. Dr. Marcus is board certified in clinical cardiac electrophysiology by the American Board of Internal Medicine. Dr. Marcus is licensed in California.

Dmand AI lists angioplasty, atrial fibrillation and flutter, cardiac arrhythmia, cardiomyopathy, heart blockage, heart failure, heart valve disorders and intermittent racing heartbeat (PSVT) among the conditions Dr. Marcus treats.

CMS data shows 1,354 Medicare services from Dr. Marcus across 10 procedure codes in 2024, for 669 Medicare patients. Medicare paid $53,563 for them.

CMS counts 669 Medicare patients who saw Dr. Marcus in 2024. The largest group is 75 to 84, with 245 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 41% are also on Medicaid. Their average risk score is 2.46, 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. Marcus' median patient age at 74, with 46% women.

In 2024, Dr. Marcus wrote 177 Medicare Part D claims for 55 patients. 73% of them were for generic drugs. CMS names the drug for 144 of them, across 6 drugs with 11 or more claims each, at $66,035 in total drug cost. In 2023, CMS named 166 claims across 5 drugs.

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 100 out of 100 for Dr. Marcus for performance year 2024, reported as part of a group. Dr. Marcus accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Marcus as offering telehealth.

Pacemaker insertion or repair: 1 to 10 procedures (CMS shows small counts as a range)

Dmand AI links 392 papers to Dr. Marcus, published from 2003 to 2025. 2021 was the busiest year, with 31. The most frequent topics are Atrial Fibrillation, Electrocardiography and Catheter Ablation. Dr. Marcus has published most often in Heart Rhythm. Dr. Marcus' most frequent co-authors are Jeffrey E. Olgin, MD, Thomas A. Dewland, MD and Byron Kwock Lee, MD.

Dmand AI links Dr. Marcus to 9 clinical trials. Conditions studied include Atrial Fibrillation, Arrhythmias, Cardiac and Atrial Premature Complexes. University of California, San Francisco sponsors the most, 8.

CMS Open Payments shows 25 general payments to Dr. Marcus from 10 drug and device companies from 2016 to 2025. Consulting fees make up the largest share, 46% of the total. Biotronik Inc. paid the most, $7,500.

Dmand AI lists 5 awards for Dr. Marcus, most recently Member in 2022.

Dr. Marcus graduated from George Washington University School of Medicine and Health Sciences in 1998. Dr. Marcus is a member of ACC.

Dr. Marcus is in network with 12 carriers, including Aetna, Excellus BlueCross BlueShield and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.