About
Katherine K. Marcel, MD, is a board-certified internist and the founder of Marcel Clinic in Baton Rouge, Louisiana. She holds board certification in Internal Medicine from the American Board of Internal Medicine. Dr. Marcel earned her medical degree from LSU Health Shreveport in 2016. She began her undergraduate studies at the University of Texas at Austin before completing her degree at Baylor University.
Dr. Marcel completed her Internal Medicine Residency at LSU Health Shreveport. In 2019, her peers and program recognized her leadership by selecting her as Chief Resident. That role deepened her clinical expertise and gave her the opportunity to mentor fellow residents. She holds a full license to practice medicine in Louisiana. Outside the clinic, Dr. Marcel is married and a mother of three. She enjoys traveling and spending time with friends and family.
Education & Training
Undergraduate
Baylor University (also attended University of Texas at Austin)
Medical School
LSU Health Shreveport (MD, 2016)
Residency
Internal Medicine, LSU Health Shreveport; Chief Resident 2019
Certifications
Conditions Treated
Who is Dr. Marcel right for?
Dr. Marcel is a strong fit for adults who want a proactive, prevention-focused primary care physician. Patients managing chronic conditions like diabetes, coronary artery disease, anxiety, or depression benefit from her thorough internal medicine background. She also serves patients who prioritize early cancer detection through comprehensive annual screenings. Adults under 30 can join through a Junior Membership, making her accessible across a wide age range.
Similar Doctors Nearby
Dr. Charles SasserMD
ADHD, hypertension, chronic disease +6 more
Dr. Gunjan RainaMD
Dr. Ben LevronMD
diabetes, hypertension, high cholesterol +3 more
Frequently Asked Questions
Dr. Marcel treats a broad range of conditions in her internal medicine practice. Her clinical focus includes diabetes, coronary artery disease, anxiety, depression, and sleep disorders. She also screens for and manages vitamin deficiencies and weight concerns. On the preventive side, she conducts screenings for breast, colon, prostate, and lung cancers.
Yes, Dr. Marcel holds board certification in Internal Medicine from the American Board of Internal Medicine. She earned her medical degree from LSU Health Shreveport in 2016 and completed her residency at the same institution, where she also served as Chief Resident in 2019.
Dr. Marcel completed both her medical degree and her Internal Medicine Residency at LSU Health Shreveport. She earned her MD in 2016. Her program selected her as Chief Resident in 2019, a role that expanded her clinical leadership and her experience mentoring other residents.
Dr. Marcel takes a proactive stance on prevention. She guides patients through comprehensive annual checkups that include screenings for diabetes, sleep disorders, anxiety, depression, vitamin deficiencies, and multiple cancers. She also offers access to Galleri Multi-Cancer Early Detection testing for patients who want broader screening coverage.
Active Marcel Clinic members can reach Dr. Marcel 24 hours a day, seven days a week. She is accessible by phone, email, and through the MyChart portal. The clinic is open Monday through Thursday from 8 AM to 4 PM and Friday from 8 AM to noon, but member access extends well beyond those hours.
Yes, Dr. Marcel coordinates specialist referrals directly for her patients. Her team manages that process on the patient's behalf, making specialist access more straightforward for members.
Dr. Marcel offers screenings for breast, colon, prostate, and lung cancers as part of annual care. She also provides access to Galleri Multi-Cancer Early Detection testing, which screens for multiple cancer types from a single blood draw. Coronary artery disease screening, including CT calcium scoring and EKG, is also part of her annual workup.
Yes, Dr. Marcel sees patients of all adult ages. The practice offers a Junior Membership tier for patients under 30, priced at $2,000 annually or $167 per month. Standard Membership is available for patients 30 and older.
Doctor profile last updated April 5, 2026