About Us

Mary Hammock Jahr, CPNP, PMHS-BC

Mary graduated from The University of Central Florida with a Bachelor of Science in Nursing in 1997. She worked at Arnold Palmer Hospital for Women and Children as a pediatric medical/surgical nurse. In December of 1999, she graduated with a Master of Science Nursing degree from Emory University. She is certified by the Pediatric Nursing Certification Board and participate in continuing education activities. During her education, she spent many clinical hours in a busy primary care pediatric practice.

Mary is educated to evaluate and diagnose illnesses and injuries and treat, as well as prescribe according to clinical research and recommendations. She is thorough in wellness checks and sports participation physicals. Mary can order and interpret lab results and x-rays, and counsel patients and their families about treatment plans, general health, and illness specific education. She has worked in other busy pediatric practices for more than 11 years and enjoys getting to know her patients and their families. She loves to watch the children grow into beautiful and accomplished young adults, with big dreams ahead.

Healthy Steps Pediatrics opened in March of 2011. Mary is incredibly excited to have her own practice and looks forward to continuing relationships and building new ones with not only your children, but also your family. Mary has developed special interests over the years, including allergies, asthma, autism, abdominal pain, foster care, polycystic ovarian syndrome, and special needs.

Mary enjoys teaching and continues to lecture at Emory University. She often has clinical NP students in the office.

Mary has four beautiful and awesome children, ages 7 to 12 years. She is proud to be the mother of a special needs child. Being a mother has enriched her life and improved her practice. She has lived in Cobb County since 2002. She feels incredibly blessed!!!

Dr. Caroline Miller, MD

Caroline B. Miller, MD is a native of Roswell, Georgia. She completed her undergraduate degree at Furman University then proceeded to Marshall University School of Medicine. After earning her medical degree, she completed a residency at Cincinnati Children’s Hospital Medical Center where she stayed to serve as chief resident.

Since returning to the Atlanta area, Dr. Miller worked at CHOA Scottish Rite emergency room for 9 years then in private practice for five years.

Dr. Miller is excited to join Healthy Steps as she has a strong desire to partner with families to maximize their child’s potential. Dr. Miller has experience in multiple disease processes; however, her passion is to improve nutrition and wellness to enhance quality of life and prevent diseases, when possible.

Caroline and her husband have three sons who are in high school and college. They enjoy outdoor sports, travel, being involved in their church and any time together as a family.

Meagan Darling, CPNP

Meagan grew up in Roswell, Georgia. She is a graduate of the University of Georgia (Go Dawgs!) where she received her Bachelor’s Degree in Child and Family Development. Meagan then obtained her Bachelor’s of Science in Nursing Degree from what was formerly known as the Medical College of Georgia (now termed Augusta University) in 2013. Meagan also obtained her Masters of Science in Nursing (with her focus in pediatrics) from Augusta University May of 2016.

Her former work experience includes numerous hours working with children in a variety of settings and 4 years working as a bedside nurse in the Pediatric Intensive Care Unit at Children’s Healthcare of Atlanta at Scottish Rite.

She is certified by the Pediatric Nursing Certification Board as a Pediatric Nurse Practitioner.

Meagan has special interests in early childhood (birth-age 5), asthma, and wellness promotion in the pediatric population.
Meagan and her husband, Aaron, have one young son, Parker. In her free time, Meagan enjoys spending time with her family and friends, reading, spending time outdoors, and staying involved at her local church.

Jordan Ruff, CPNP-PC

Jordan grew up in West Cobb and was a graduate from Georgia Baptist College of Nursing. After obtaining her Bachelor of Science in Nursing, and minor in Discrete Mathematics, she went back to school to pursue her Master of Science in Nursing from the University of Alabama at Birmingham. While there, she specialized in pediatric primary care.

Jordan’s work experience began as a nurse in the Pediatric Intensive Care Unit at Children’s Healthcare of Atlanta. During her time at Children’s, Jordan worked in New York City to support the COVID crisis response at the start of the pandemic, and continued to travel nurse in Texas and Colorado. While obtaining her masters, she worked with a pediatric behavioral health center with a focus on children with eating disorders.

Jordan has a heart for adolescent mental health as well as encouraging healthy and sustainable lifestyle patterns in the pediatric population. Jordan, her husband, and two labs (Stella & Porter) like to explore downtown Marietta and hike/camp in North Georgia. Jordan is an avid runner and enjoys competing in running races and triathlons with her family.

Erin Ferguson, CPNP-PC

Erin grew up in Acworth Georgia and has only lived here in Cobb County. She is a graduate of Georgia Baptist College of Nursing at Mercer University where she received her Bachelor’s Degree of Science in Nursing. Erin further obtained her Masters of Science in Nursing with a focus in pediatric primary care from University of Alabama of Birmingham in 2016.

Her former work experience includes working at Children’s Healthcare of Atlanta at Scottish Rite where she spent 5 years in the Emergency Department and 4 years in the Pediatric Intensive Care Unit serving the acute and critical care settings within the hospital environment. During her time at Children’s, she obtained advanced competencies and certifications where she was able to treat and manage a diverse population of disease processes in trauma, neurosurgery, neurology, pulmonology, cardiology, general surgery, and cranio-surgery. She advanced her career as a pediatric primary care nurse practitioner in the primary and private setting since 2016 prior to joining the family here at Healthy Steps Pediatrics.

Erin has special interests that include asthma and allergy, but her primary focus and passion for our patients is preventative care that includes, delivering wellness promotion along with providing family centered care, detection of illness and disease, and accident prevention.

Erin and her husband Lane have two boys, Sawyer and Finn, whom all are proud Georgia Bulldog fans and members of Burnt Hickory Baptist within the community. She spends her days either at the fields, ballpark, or in a gym, as a proud football, baseball, and wrestling mom and attempts to squeeze in a work out or run if there is any time left out of her day.