Dr. Carol Madellaine Marquez, MD

Dr. Marquez practices at Stanford Hospital at 300 Pasteur Drive in Stanford, California, part of Stanford University.

Dr. Marquez's NPI, 1568478014, was assigned on August 1, 2006. Dr. Marquez graduated from UCSF School of Medicine in 1987. Dr. Marquez holds California license G64905.

Dr. Marquez's primary practice is Stanford Hospital at 300 Pasteur Drive, at 300 Pasteur Drive, Stanford, CA 94305 in Santa Clara County. The practice phone is (650) 723-4000.

Dr. Marquez's primary practice is Stanford Hospital at 300 Pasteur Drive in Stanford, California, part of Stanford University. Dr. Marquez is also affiliated with Good Samaritan Hospital. The medical group on file is Stanford Health Care. Dmand AI also links Dr. Marquez to 1 more hospital and 1 medical group, each named with a free account. Dr. Marquez's employer is on file too: a hospital.

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

Radiation oncology is Dr. Marquez's primary specialty in the NPI Registry, under taxonomy code 2085R0001X. Dr. Marquez is board certified in radiation oncology by the American Board of Radiology. Dmand AI has Dr. Marquez's licenses on file in 3 states: California, Oregon and Washington.

Dmand AI lists anal cancer radiation, bone cancer radiation, breast cancer radiation, colorectal cancer radiation, lung cancer radiation, lymphoma radiation and uterine cancer radiation among the conditions Dr. Marquez treats.

CMS data shows 2,403 Medicare services from Dr. Marquez across 17 procedure codes in 2024, for 474 Medicare patients. Medicare paid $152,327 for them.

CMS counts 474 Medicare patients who saw Dr. Marquez in 2024. The largest group is 65 to 74, with 254 patients. 75% of them have cancer, and 75% have high cholesterol. 19% are also on Medicaid. Their average risk score is 1.57, 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. Marquez's median patient age at 62, with 69% women.

In 2024, Dr. Marquez wrote 113 Medicare Part D claims for 77 patients. 97% of them were for generic drugs. CMS names the drug for 87 of them, across 1 drug with 11 or more claims each, at $1,418 in total drug cost. In 2023, CMS named 53 claims across 1 drug.

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

Dmand AI links 17 papers to Dr. Marquez, published from 2019 to 2025. 2019 was the busiest year, with 2. The most frequent topics are Radiotherapy Dosage, Antibodies, Monoclonal and Antineoplastic Agents. Dr. Marquez has published most often in Int J Radiat Oncol Biol Phys. Dr. Marquez's most frequent co-authors are Susan Jane Knox, MD, PhD, Lynn Million, MD and Michael L. Goris, MD.

Dmand AI links Dr. Marquez to 1 clinical trial. Conditions studied include Breast Neoplasms and Breast Diseases.

CMS Open Payments shows 1 general payment to Dr. Marquez from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. Abbvie Inc. paid the most, $147.

Dmand AI lists 1 award for Dr. Marquez, most recently CMS Stage 1 EHR in 2013.

Dr. Marquez graduated from UCSF School of Medicine in 1987. Dr. Marquez is a member of ACR and ASTRO.

Dr. Marquez is in network with 6 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. HMO plans come from the most carriers, 3. Check the plan with the practice before a visit.