Our Providers

Brannan Cole, MSN


Brannan U. Cole joined the Vanderbilt faculty after 3 years of working as a nurse practitioner in endocrinology. He is fascinated with the relationship between diabetes and depression. Do individuals with type II diabetes make poor food choices because of an underlying brain chemistry imbalance or does depression contribute to making poor food choices, and what is a health care provider’s best entry point to diagnose and treat these conditions? Brannan wants to explore and understand the interdependency between these two issues and see how interventions to address one variable could affect or alleviate the impact of the other condition. Brannan sees examining a patient’s relationship with food as a central component to long-term behavior change needed to address diabetes. Counseling and patient retention of information post-appointment is another area Brannan works to improve and better understand.

Brannan's greatest joy is spending time with friends and family and he feels lucky to call his family his best friends. He loves to travel, watch sports (especially SEC football!), finance, reading, spending time at the lake, and working out. He is thrilled for this opportunity to join the Vanderbilt team and to contribute to positive patient outcomes.


Ann Hackett, APRN

Ann Hackett is a Nashville native, growing up in nearby Franklin. She received both her undergraduate and graduate degrees at Vanderbilt. She has been a nurse practitioner for 10 years, and she joined the Glucose Management Service in 2013.  As a Nurse Practitioner, she most enjoys getting to know her patients and their families.  Her special Endocrine interests are post-bariatric surgery and high insulin dose requirements.  Ann Hackett, and her husband, Andrew, enjoy spending most of their time with their 3 young daughters and being active members in their church. When she's not at the hospital you can find her cheering on the Predators, looking for scenes to practice photography, or playing with her dogs. 


Regina Hamlet,

Regina earned her Bachelor of Science in Nursing from Western Kentucky University in 2010. She went on to work at the University of Kentucky Chandler Hospital as a Registered Nurse on the Neurosciences Progressive Unit where she mostly cared for patient effected by strokes and other neurologic disorders. In 2015, Regina received her Masters of Science in Nursing and became a board certified Family Nurse Practitioner. Working with stroke patients sparked an interest in chronic care management and the desire to prevent such complications, so she went on to work at the University of Kentucky Endocrinology Clinic managing diabetes, hyperlipidemia, hypertension, and thyroid issues. Regina moved to Nashville, TN in 2017 and continues to enjoy working with Endocrinology patients. Regina’s goal is to educate and empower all her patients.


Tiffanie Marksbury,

Tiffanie was born and raised in East Tennessee and fell in love with Nashville while attending Belmont University for nursing school. Tiffanie received Masters of Science in Nursing from Emory University and has been practicing as a nurse practitioner for several years. She eagerly joined the Vanderbilt faculty in August 2018, and previously practiced in the Diabetes Center at Heritage Medical Associates. Tiffanie is passionate about building substantial and meaningful relationships with patients and works to ensure that they live the best life possible with diabetes. Tiffanie's passion for diabetes began nearly 30 years ago when her sister was diagnosed with Type 1 diabetes. Tiffanie is also interested in the prevention of type 2 diabetes which was the focus of her scholarly project while completing her Doctorate of Nursing Practice. Outside of work, Tiffanie enjoys spending time with her dogs, travelling with her husband to run half marathons in hopes of completing 50 half marathons in 50 states, and cheering for the Tennessee Vols. 


James Mills Jr., ANP-BC


James Mills, originally from a small town in West Tennessee moved to Nashville in 2007 and began his nursing career following graduation from Murray State University. James spent five years in the emergency department and post anesthesia care unit as a registered nurse at Vanderbilt University Medical Center. He completed his Masters of Science in Nursing in 2012 and joined the Division of Diabetes, Endocrinology, and Metabolism.  His special interests include post-transplant hyperglycemia, insulin pump/continuous glucose monitoring,  and diet/wellness modification. In his free time you will likely find James on a golf course, in the gym, or at the dog park with his human-sized Bernedoodle, Ted.



Jennifer Prager,


Jennifer completed her undergrad degree in health sciences at Wheaton College in Illinois and went on to obtain her graduate degree in nursing at Vanderbilt. She has worked as a nurse practitioner since 2011. She joined Vanderbilt in 2016 as part of Eskind Diabetes Clinic and the Glucose Management Service. Working with diabetic patients has always been rewarding for Jennifer as she believes it is a disease that people can truly control.  She enjoys being apart of a field that is always evolving (clinically and practically) with new ways to empower patients to manage their disease. As a provider, it is her goal to provide every patient with the best tools - whether medications, education or general support - to achieve good management. 

Prior to working at Vanderbilt, Jennifer spent almost five years in primary care. It was a rewarding and challenging experience managing many different types of diseases and has helped her in caring for patients now as she has a better understanding of the full clinical picture.

Jennifer grew up as a military kid, so home has always been where her family is. The majority of her life has been spent living in Germany, Hawaii and now Nashville. Having moved so much as a kid she still enjoys traveling as much as she can and spending time with her family and friends. She loves living in Nashville and exploring the city. She enjoys finding new brunch spots in town, running, baking, and cooking.


Blake Salmony,


Blake Salmony is a North Carolina Native and has been living in Nashville over 10 years. A graduate of Vanderbilt's School of Nursing, Blake has been with Vanderbilt's Eskind Endocrine clinic since 2012 working both in the clinic and in the hospital. A founding member of the Glucose Management Service, Blake now works exclusively on the inpatient service. He is focused on providing excellent care while patients are hospitalized, and easing transition to outpatient care following discharge. 

In his free time, Blake works with the Southeastern Climber's Coalition, focusing on preservation and maintenance of wild and scenic lands in Tennessee, Alabama, and Georgia. He works on trail days, participates in fundraisers, rock climbs and runs with his dog, Cota, in his free time.