Michelle Armstrong, BS, RCS


Michelle Armstrong serves as a Pediatric Cardiology Sonographer at the Mississippi Center for Advanced Medicine. In this role, Michelle works with Dr. Mattingly to provide echocardiograms for pediatric patients. Prior to joining MCAM, she served as a cardiovascular sonographer at Central Mississippi Medical Center, Jackson Heart Clinic, Precision Ultrasound and Mississippi Baptist Medical Center. Ms. Armstrong holds a Bachelor of Science in Biology from Mississippi College and is a Registered Cardiac Sonographer (RCS) through Cardiovascular Credentialing International. Michelle is married to Jay and they have two daughters, Ellen Clark, and Mary Cole. They enjoy being outside, traveling, and cheering on the Mississippi State Bulldogs.

Brandi Dykes, BSN, RN


Brandi serves as the Pediatric and Fetal Cardiology nurse at Mississippi Center for Advanced Medicine and provides clinical and programmatic expertise to this unique patient population. Prior to joining MCAM, Brandi has had experience at four different pediatric healthcare settings including a pediatric medical/surgical floor at Willis-Knighton Health System, Nursery and Neonatal ICU at Terrebonne General Medical Center and the Pediatric ICU at Ochsner Hospital for Children. Brandi has also served as a Pediatric Transplant Coordinator for cardiac and renal patients. She holds a Bachelor of Science in Nursing from Mississippi University for Women and is passionate about providing the care support and coordination for each patient family.

Kristi Griffin, BSN


Kristi Griffin serves as a Pediatric Allergy and Immunology nurse at MCAM in Madison. Kristi works in connection with Dr. Rodriguez and the Allergy team to provide patient support, allergy testing and immunotherapy, pulmonary function tests with complete lung volumes, clinical expertise, and asthma education for patients and their families. Ms. Griffin holds a Bachelor of Science in Nursing from McNeese State University and has several years of experience as a charge nurse in a pediatric setting. Kristi has also spent time on a hospital inpatient unit at St. Dominic’s Hospital. She is passionate about providing the highest quality care and service to children and their families. Kristi is married to, Adam, and they have three children, Addelyn, Lawson, and Libby. She enjoys being outdoors with her children and pets and having family movie nights.

Lasheba Lankston, CCMA

Lasheba Lankston

Lasheba Lankston serves as a Medical Assistant for the Pediatric Metabolic Clinic. In this role, she works with Dr. Herring to provide clinical support for patient families working to achieve their healthy weight goals. Lasheba will also be frequently found working at the front desk where she provides a professional approach to checking patients in and out and answering the phone. Lasheba also provides triage support, helps room patients, draw blood and coordinate their care. In her spare time, Lasheba enjoys spending time with her husband Curtis and three beautiful children Makala, Curtis Jr, and Tamia Lankston.

Linnea McMillan, BSN


Linnea McMillan leads the prior authorization department at MCAM with the mission critical objective of ensuring that approvals for patient care activities are smooth and seamless. Linnea also provides nursing support for a variety of clinical departments at MCAM including Neuromuscular and Maternal Fetal Medicine. Linnea has over thirty years of nursing experience and graduated with a Bachelor of Science in Nursing from the University of Mississippi Medical Center. Ms. McMillan has previously served in both inpatient and outpatient clinical oncology settings and also has broad home health and managed care experience. Linnea enjoys going to the beach with her three children in her spare time.

Shandi Roberson, RN

Shandi Roberson

Shandi Roberson serves as a Pediatric Surgical Nurse for the Pediatric Orthopedic Surgery and Pediatric Plastic Surgery programs at MCAM. In this role, she works closely with Dr. Danko and Dr. Bhatti to provide the best possible care for pediatric surgery patients at MCAM. Shandi’s compassionate disposition and dedication to patient care ensures the surgical clinics and their associated procedures run as smoothly as possible. Shandi received her Associate of Science in Nursing from Copiah Lincoln Community College. Mrs. Roberson’s vast pediatric nursing experience includes caring for children in an intensive care unit, working as a pediatric home health nurse, and working at a pediatric extended care facility for children with complex medical needs. In her spare time, she enjoys trying new recipes, completing DIY projects with her husband Michael, and spending time with their dog Danah.

Kelley Robert, NRCMA

Kelley Robert

Kelley Robert serves as a Medical Assistant at Mississippi Center for Advanced Medicine. In this role, Kelley assists the Child Psychiatry and Developmental Pediatrics team document patient encounters, room patients, take vital signs, and helps answer patient phone calls. Ms. Robert’s friendly demeanor and dedication to patient care ensures the clinics run effectively and efficiently. She loves the feeling of family that MCAM offers and the support of her passion for patient care knowledge. Kelley looks forward to the opportunity to expand her medical career with MCAM once her nursing degree is complete at the University of Texas at Arlington. She is a Nationally Registered Certified Medical Assistant (NRCMA) and possesses over ten years of experience working both front and back office in various healthcare settings. Kelley has pediatric healthcare experience having worked as the lead medical assistant for a busy pediatric clinic in Texas. In her spare time, Kelley enjoys playing violin, cello, and piano. She also enjoys outdoor activities with her dog.

Maddie Robinson, BSN

Maddie Robinson

Maddie Robinson serves as a Pediatric Endocrinology Nurse at Mississippi Center for Advanced Medicine. She provides patient education, support, and clinical expertise for patients with diabetes and other endocrine disorders. Maddie has previous hospital experience where she was engaged with daily monitoring, physical assessments, IV sticks and evaluating patients on a pediatric inpatient unit. Her pediatric hospital experience in nursing further grew her interest in caring for children, specifically for the care and management of children with diabetes. She is passionate about providing the best care possible to every patient, as well as their families. Mrs. Robinson holds a Bachelor of Science in Nursing from University of Mississippi Medical Center. Maddie is married to Luke, and together they have a daughter named Eva. In her spare time, she enjoys being with friends and family, trying new places to eat, and spending time in her favorite town, Fairhope, Alabama.

Tammy Rogers, BSN

Tammy Rogers

Tammy serves as a registered nurse at the Pediatric Urgent Care by MCAM.  She triages patients, obtains vital signs, performs phlebotomy, and point of care testing, while also coordinating patients' care.  Mrs. Rogers holds a Bachelor of Science in Nursing from Tennessee Wesleyan College and is currently enrolled in graduate school at the University of Alabama at Birmingham pursuing her Masters' degree as a Family Nurse Practitioner.  She has previous experience working with pediatric patients in the emergency room, primary care, and urgent care environments. She loves working for MCAM's urgent care because the entire team truly cares about patients and strives to provide the most effective care which leaves a positive impression on the family. Tammy loves being a nurse, because she enjoys caring for and helping those in need.  Tammy's demeanor and positive attitude are great assets to our urgent care, and most importantly, to pediatric patients and their families who come to us when they are sick or injured. In Tammy's free time, she enjoys spending time with her husband and three children.  She also enjoys spending time with friends, board games, reading, being outdoors, kayaking, and traveling. 

Dewana Wright, BSN

Dewana Wright

Dewana serves as a Pediatric Rheumatology and Pediatric Pain nurse at Mississippi Center for Advanced Medicine. Dewana’s vast and related experience includes ten years at a hematology and oncology clinic where she routinely administered chemotherapy and other infusions, drew blood and processed labs. She also has nursing experience in a home health and hospice setting. Her professional passion is to provide individualized, high quality nursing care and to ensure that pediatric patients feel well-treated. Ms. Wright holds an Associate’s Degree in Nursing from Mississippi Delta Community College and a Bachelor’s Degree in Nursing from Mississippi University for Women. Dewana’s subject matter expertise and penchant for providing compassionate care to children and their families make her an excellent match for MCAM. In her free time, she enjoys cooking, gardening, shopping, and spending time with her children & grandson.