News: Flu Shots! Yes, it’s that time again - and we have them! Call to make an appointment. Get your child protected today! 972-317-6000

Location & Hours

We have convenient office hours and separate sick and well waiting rooms. We strive to make your life easier.

  • Monday 7:00am – 7:00pm
  • Tuesday 7:00am – 7:00pm
  • Wednesday 7:00am – 7:00pm
  • Thursday 7:00am – 7:00pm
  • Friday 7:00am – 5:00pm
  • Saturday 9:00am – up to 2:00pm as needed

Call for holiday hours as times may change and for urgent assistance after hours, call 972-317-6000.

Meet the Team

Our Physicians, Pediatric Nurse Practitioners, Physician Assistant and Psychologist are well trained and all board-certified.

Susan Badaracco,MD,FAAP
Kalpana Kelkar,MD,FAAP
Marla R Conger,MD,FAAP
Tricia Sias,MD,FAAP
Missy Nicholson,RN, MSN,CPNP
Sarah Caudle,MPAS,PA-C
Leigh Gistinger,RN, MSN,CPNP
Christina Della Nebbia,Ph.D,BCBA

Susan Badaracco, MD, FAAP

While in medical school, I was sitting in a small office jotting down notes when a toddler wandered in. Without hesitation, she climbed in my lap and looked over my papers.

Scant minutes later, a frantic mom followed her into the room. She looked relieved, instead of frightened, at finding her daughter in a stranger ‘s arms. Two things happened. One, I knew without hesitation that I wanted to be a pediatrician. There is nothing that warms the heart faster then holding a child. Two, I recognized what an honor it is to be allowed to hold someone’s greatest treasure…not to mention to be allowed to participate in their medical care and upbringing.

I love my job.

Read more about Susan Badaracco,MD,FAAP

Anybody who does anything to help a child in his life is a hero to me.
(Fred Rogers)

Read more about Susan Badaracco,MD,FAAP

Kalpana Kelkar, MD, FAAP

I’ve been a biology nerd since the 7th grade when we dissected a sheep heart. There would be a pig and a cat dissection in the years to follow that only reinforced my love for biology. After reading a Readers Digest story about a child with cystic fibrosis I was convinced that medicine would be in my future–I was convinced I would be a pediatrician.

I lived in Colorado for most of my life. I studied molecular biology in fruit-flies at the University of Colorado in Boulder. After medical school in Denver, my husband and I moved to Texas so I could do my residency at UT Southwestern at Children’s Medical Center. Both my boys were born in Irving, TX. When my oldest son was 6 months old, I started working at Kids First Pediatrics. Flower Mound has been our home since 2005.

Read more about Kalpana Kelkar,MD,FAAP

You have BRAINS in your HEAD
You have FEET in you SHOES
You can STEER yourself any
DIRECTION you CHOOSE.
(DR. SEUSS)

Read more about Kalpana Kelkar,MD,FAAP

Marla R Conger, MD, FAAP

I have wanted to be a doctor since I can remember but the deal was sealed when I cut the tip of my finger off with a paper cutter while making a menu for my high school french class.  The baskeball coach told everyone that I picked up my finger (with my teeth, not exactly true) and drove myself to the emergency room.  I was fascinated watching them sew it back on.

After medical school and residency, I turned to Texas where my sister and her husband relocated.  I worked in Lewisville and Flower Mound and I established Kids First Pediatrics in 1991.  My common sense pediatric knowledge increased tremendously after having twins, one girl and one boy! They continue to teach me about parenting even now as adults!
Over the years I have become very interested in the mental health of our children and teens.  I have joined WATCH (Wellness Alliance for Total Children’s Health of Denton County, watchdenton.org). This organization has prioritized mental health to identity and catch all children with needs from Flower Mound, Lewisville, Lantana and all of Denton County.  I also joined MRC (Medical Reserve Corp of Denton County).

Read more about Marla R Conger,MD,FAAP

Never cease to stand like curious children. (Albert Einstein)

Read more about Marla R Conger,MD,FAAP

Tricia Sias, MD, FAAP

Coming from a family of several teachers, it is not surprising to me that I ended up specializing in Pediatrics. I too, fell in love with working with kids! One of the things I love most about my job is providing education and guidance during each new and exciting stage of a child’s life. As a pediatrician, I have the opportunity to educate my patients to lead healthier lives – both physically and emotionally – and build relationships with them.

After earning my medical degree from Florida State University in Tallahassee, Florida, my husband I ventured out to the great state of Texas for my residency training at Children’s Medical Center in Dallas. This was a very busy, high volume residency program, and I feel fortunate to have had the experience of caring for so many children with such a wide variety of medical conditions. During my training, I realized that when I cared for children in the hospital, I would often feel disappointed that I would not be able to follow up with them again as an outpatient to see how they were doing. This is one of the reasons I knew I was meant to be a general pediatrician!

Read more about Tricia Sias,MD,FAAP

There are no perfect parents, and there are no perfect children, but there are plenty of perfect moments along the way. (Dave Willis)

Read more about Tricia Sias,MD,FAAP

Missy Nicholson, RN, MSN, CPNP

While I have not always liked going to the doctor, or been the most cooperative patient, I have always wanted to work in the medical field.  I still clearly remember hiding behind the couch in my pediatrician’s office and having to be pulled out kicking and screaming!  Coming from a family of nurses, I started playing with stethoscopes at a young age and everyone was my patient – family, friends, dogs, and even my pet duck!

In high school, I worked as a Volunteer Candy Striper in the local hospital.  I loved being around kids so I babysat as often as I could. After high school, I attended nursing school at the University of Texas in Austin.  Pediatrics was where I wanted to be.  I worked as a floor nurse, then charge nurse in Austin before I got married and moved to Dallas.  I began working at Children’s Medical Center in Dallas on a general peds floor, followed by liver transplant floor and ending up in Oncology.   This was a very wonderful and satisfying job, but I wanted a little more autonomy.  While working full time I went back to school at UT Arlington and got my Master’s degree and Nurse Practitioner license.  And that brings me to where I am today.

Read more about Missy Nicholson,RN, MSN,CPNP

We teach our children all about life, but they teach us what life is about.
(Angela Schwindt)

Read more about Missy Nicholson,RN, MSN,CPNP

Sarah Caudle, MPAS, PA-C

I was born and raised in Plano, where I competed with my two sisters for attention. I was always in “high-gear” and strived to be “perfect” in and out of school. I was a natural athlete and competitor in multiple sports growing up, but in high school I played volleyball all year round. I worked extremely hard in school to graduate in the top of my class as I always knew I wanted to pursue a career in the medical field. I played college volleyball while getting my bachelors from Austin College and taking all my pre-med prerequisites. I also worked as an athletic trainer on campus giving me an edge on my sports medicine and orthopedics interest. I finished college in 3 years so you can imagine how “busy” I was. I received my bachelors in biology, minor in exercise sports science in May 2008. I got into the PA program at UT Medical Branch in Galveston and finished my masters in Physician Assistant Studies in Dec. 2010.

Read more about Sarah Caudle,MPAS,PA-C

Children are not a distraction from more important work. They are the most important work! (C. S. Lewis)

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Leigh Gistinger, RN, MSN, CPNP

Looking back on my life and the path that led me here, I know that I am exactly where I am meant to be. I actually started life in a foreign country but ended up in Texas marrying a man from Marlin who only speaks Texan. Of course a lot happened in the interim. The middle child of an Army officer, I was born in Stuttgart Germany, spent my childhood living in multiple locations across the United States and was back in Germany the first three years of highschool. We transferred to Killeen, Texas my senior year. That was very hard. I can certainly identify with the pains of change in childhood-new places, new schools, leaving and making new friends, uncertainty, depending on my family in times of transition and so on. Although there were challenges, many positives came from our frequent relocations and in retrospect, I’m thankful for all of them.

Read more about Leigh Gistinger,RN, MSN,CPNP

What lies behind us and what lies before us are tiny matters compared to what lies within us.
(Oliver Wendell Holmes)

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Christina Della Nebbia, Ph.D, BCBA

I feel very fortunate to be a member of the team at First Kids Pediatrics! I enjoy working with children and adolescents and have done so for 30 years. I first became acquainted with Kid’s First Pediatrics as a parent, as my three children were patients here. I appreciated the kind and professional care my children received and now I am fortunate to be a provider.

Read more about Christina Della Nebbia,Ph.D,BCBA

Every day in every way I’m getting better and better.
(Dr. Milton Erickson)

Read more about Christina Della Nebbia,Ph.D,BCBA