Meet Our Doctors & Providers
Alpharetta & Cumming Internal Medicine’s Physicians
Jason Holbrook, MD
Doctor of Medicine
Emory School of Medicine 1996
Emory University Affiliated Residency Program Atlanta, GA 1999
Certified by American Board of Internal Medicine, 2000, 2010
Margaret Still, MD
Doctor of Medicine
Emory University School of Medicine 1987
Internship – University of Alabama at Birmingham & Affiliated Hospitals 1988
Residency Program – Emory University and Affiliated Hospitals 1990
Board certified by American Board of Internal Medicine, 1990, 2000, 2010
Todd Miller, MD
Doctor of Medicine
University of Missouri – Kansas City School of Medicine 1995
Residency Program
Emory University 1998
Board certified by American Board of Internal Medicine 2008
Medical License, State of Georgia 2008
Kaya Caldwell, MD
Doctor of Medicine
Medical College of Ohio 1992
Residency Program
Riverside Methodist Hospital, Columbu Ohio
Board Certified General Internist
Interest in Preventive Medicine
Marianne Sanchez, MD
Royal, Major and Pontifical University of San Fransisco 1997
Internship – Bolivian-Japanese Gastroenterological Institute 1995
Internal Medicine Residency Program
Atlanta Medical Center 2003
Board certified by American Board of Internal Medicine, 2003, 2013
Jennifer Cook, MD
Doctor of Medicine
Medical College of Georgia 2009
Internal Medicine Residency
University of Kentucky 2012
Board certified by American Board of Internal Medicine 2012
Controlled Substance Registration Certificate 2010, 2013, 2016
ACLS & BLS Certified
Tina H. Strickland, FNP-BC
Emory University, Nell Hodgens Woodruff School of Nursing
Master of Science in Nursing – December 1999
Georgia – American Nurses Credentialing Center – Certified Nurse Practitioner
American Academy of Nurse Practitioners – Member
Sara W. Wallace, NP-C
University of South Alabama, Mobile AL
Master of Science in Nursing – December 2016
Georgia – American Academy of Nurse Practitioners
Certified Ambulatory Procedure Nurse (CAPA)
American Academy of Nurse Practitioners
Lisa Montbellier, PA
Emory University – MS Health Science/Physician Assistant Curriculum
National Commission on Certification of Physician Assistants/NCCPA – 1992
Manhattanville College – 1985-1989 BA Degree in Biology/Pre-Med