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  • About the Provider
  • Education & Board Certification
  • Professional Associations

Louis Diab, MD, is a board-certified Internal Medicine hospitalist. He earned his Doctor of Medicine degree from the University of Texas Medical Branch School of Medicine at Galveston in 2017 and completed his Internal Medicine residency at Baylor College of Medicine in 2020. Dr. Diab joined Kelsey-Seybold in June 2025.

Dr. Diab was inspired to pursue medicine by his childhood pediatrician, a compassionate and community-centered role model whom he also had the unique opportunity to work alongside during medical school. As a hospitalist and nocturnist, Dr. Diab specializes in the overnight management of acute medical conditions for hospitalized patients, responding to emergencies and ensuring continuity of care during the night. His clinical interests include acute care medicine, cardiology, gastroenterology, and infectious disease. Dr. Diab’s favorite parts of practicing medicine are helping people through some of their most vulnerable moments and learning from the dynamic nature of hospital medicine.

Philosophy of Care

Dr. Diab builds trust with his patients by being fully present during every encounter. He engages in open-ended conversations to understand patient goals and includes families in decision making. Dr. Diab’s philosophy of care is holistic and patient centered. He views patients as whole individuals with unique goals, values, and life stories. His care plans are collaborative and aligned with the patient's overall well-being.

Hobbies and Interests

In his free time, Dr. Diab enjoys hiking, traveling, watching sports, staying active, and crafting the perfect espresso shot.

Joined Kelsey-Seybold: June 2025

Awards & Publications

Awards

  • Abstract selected to represent UTMB at ACP Associate’s Day (2016)
  • Baylor St. Luke’s Medical Center Quality Improvement Grant recipient ($2500) (2019)
  • Physician Healer Track Certification

Publications and Presentations

Diab L, Lescinskas E. "A Fishy Diagnosis: Consider Mycobacterium When Evaluating Chronic Wounds." Presented at Society of Hospitalist Medicine, March 2019, National Harbor, MD.

Diab L, Farr A, Doris L. "An Unusual Manifestation of Aspergillus in a Diabetic Patient." Presented at Society of Hospitalist Medicine, March 2019, National Harbor, MD.

Diab L, Chang S. "Anchoring on an Unlikely Diagnosis: A Case of Primary Focal Segmental Glomerulosclerosis Misdiagnosed as Minimal Change Disease." Presented at Diagnostic Error in Medicine Conference, November 2019, Washington, D.C.

Diab L, Singh R. "IgG-4 Retroperitoneal Fibrosis: A Deceiving Disease." Presented at Diagnostic Error in Medicine, October 2020, Virtual Conference.

Diab L, Tran P. "A Heart Burdened by Cancer: Complete AV Nodal Dissociation Caused by Malignant Infiltration." Abstract submitted to Southern Society of General Internal Medicine, October 2019.

Diab L, Lu L. "Fibrolamellar Hepatocellular Carcinoma." Abstract submitted to Journal of General Internal Medicine Images, November 2019.

Medical School

  • University of Texas Medical Branch School of Medicine – Galveston, TX, 2017

Internship/Residency

  • Baylor College of Medicine – Houston, TX, 2020

Board Certifications

  • American Board of Internal Medicine - Internal Medicine
Dr. Diab is a member of the American Medical Association, Texas Medical Association, American College of Physicians, and the Society of Hospital Medicine.

Locations

Hospital Affiliations

  • Houston Methodist - Sugar Land
  • Memorial Hermann - Memorial City Medical Center
  • St. Luke's Health - Baylor St. Luke's Medical Center
  • St. Luke's Health - Sugar Land

Accepted Insurance