NEW HOURS: Monday - Friday: 7:30am-5:00pm, Saturday: 8:00AM - 12:00PM

Meet Our Providers

Dr. Lorri Phipps


I consider it a privilege to care for your child and do so as if he or she were my very own. I have always dreamed of owning my own pediatric practice and in 2017 that dream came true. It’s a practice that operates like one I’d want to take my child to as a parent. One where you can reach a doctor at any time day or night when your child is ill, where the doctor will even come to you because she knows what it’s like to worry about a sick child.

As the President and CEO of Mainstreet Pediatrics, my Big Promise to you is this:
To provide relationship-based primary health care to your children, from a mindset of true caring, in our office, through telemedicine, or in your home, when your family NEEDS it, 24/7/365!
At Mainstreet Pediatrics, our mission is to put the care back in healthcare.

More about Dr. Phipps:

Dr. Phipps has over 32 years of diverse pediatric experience. A decorated Air Force veteran, Lorri served honorably for 8 years, receiving the Air Force Achievement Medal and Air Force Commendation Medal. After separating from the Air Force, Dr. Phipps and her family moved to Pennsylvania. There she worked in the Pediatric Intensive Care Unit at Penn State Children’s Hospital. After relocating to Okinawa, Japan, in 2007, Dr. Phipps functioned as the Family Readiness Liaison for Truck Platoon, 3RD Marine Division, Headquarters Company in support of Operation Iraqi Freedom FY08, and 1st Battalion, 3RD Marine Division in support of Operation Iraqi Freedom FY08 – 09. She also continued her clinical practice through the Red Cross providing pediatric urgent care at Lester Naval Hospital. After returning to the US in 2010, Lorri took a position in the Pediatric ICU at Children’s Hospital Colorado and subsequently worked on the inpatient pulmonary service and in the Special Care Clinic. She was appointed Assistant Professor at the University of Colorado School of Medicine (2010 – 2015), and later, the College of Nursing (2015 – 2016) where she was the Program Director of the Pediatric Nurse Practitioner Program just prior to opening Mainstreet Pediatrics. During this time, Lorri also joined the faculty at the University of Arizona (part-time) as an Assistant Professor (2011 – 2018) where she developed and chaired several clinical courses in both the graduate and undergraduate nursing programs.

Lorri holds a BSN and MSN from Marquette University and a DNP from the University of Arizona.


Dr. Megan completed her undergraduate degree from the University of Iowa and her Doctorate in Nursing Practice from Rush University. She is board certified by the Pediatric Nursing Certification Board. While Megan enjoys seeing patients of all ages, her special clinical interests include care of newborns and infants along with helping support breastfeeding mothers. She has a genuine love in educating parents and patients. Megan believes strongly in patient and family-centered care and enjoys watching her patients develop and grow.

Prior to working at Mainstreet Pediatrics, Megan worked in the Pediatric Intensive Care Unit at Children’s Hospital Colorado. Megan lives in Denver with her husband and black lab. They love traveling, hiking, camping, and exploring local breweries.


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Lauren Tomlinson, FNP

Lauren completed her undergraduate degree from Baylor University and  Masters in Nursing Practice from Regis University. She is board certified by the American Academy of Nurse Practitioners as a Family Nurse Practitioner and is also certified as a Pediatric Nurse. While Lauren can see patients across the lifespan, her special interests include older elementary, adolescent, and early adulthood patients. She has a passion for facilitating parents and patients as they transition to adulthood, encouraging autonomy, and understanding of their changing bodies. She has a special focus on asthma management, healthy lifestyles for children through activity and diet, emotional and behavioral health, empowerment of children, and contraceptives. Prior to working at Mainstreet Pediatrics, Lauren worked in the Pulmonary Unit at Children’s Hospital Colorado for six years followed by a Behavioral Health Clinic. Lauren is a St. Louis native, with deep roots embedded in Colorado with her husband, two adventurous kids, and two labrador retrievers. She enjoys weekend escapes to Breckenridge, snow skiing, hiking, and family time.  

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Diana Karnilaw, MSN, CPNP-PC

Hi – I’m Diana. I’m a board-certified pediatric primary care nurse practitioner at Mainstreet Pediatrics. I completed my first undergraduate degree at the University of Denver in Biology, Psychology, and International Health. After 2 years of traveling the world and working in underserved community healthcare – I returned to school to complete my bachelor of science in nursing from New York University. I worked as an RN in both hospital and home healthcare while completing my master’s degree from the University of Pennsylvania. After 5 years working for a pediatric office in southern Colorado, family life brought me north and I found Mainstreet as I sought a pediatrician that I trusted for my own son. I started as a patient mom, and now I’m thrilled to be a provider here at Mainstreet. I live in Denver with my husband, our 15-month-old son, 3 dogs, and 2 cats. When I’m not seeing patients in the clinic or at home chasing around our little zoo – you can find me at CrossFit, hot yoga, exploring the mountains or local dog parks. I love seeing patients of all ages but particularly love toddlers, teens, and those kiddos considered medically or behaviorally complex. I love getting to know my patient families, watching my patients grow and develop, and aiding parents in any way I can as they navigate the crazy days of raising their littles. I believe in the importance of caring for my patient’s mental health as well as physical, and the obstacles that social and economic obstacles can create in seeking quality care. I can’t wait to get to know each of you and am so honored to be a part of your journey.

Lauren Schneider MSN, RN CPNP-PC/AC

Hi! My name is Lauren Schneider and I am a pediatric nurse practitioner certified in both primary and acute care pediatrics.

I graduated from the University of Texas in Austin with my Bachelor of Science in nursing in 2008. I was a pediatric intensive care unit nurse for many years. I loved taking care of my patients and their families but I wanted to continue to grow as a health care provider and further my education. I obtained my master’s degree and pediatric primary care certification as a nurse practitioner in 2012, also from the University of Texas at Austin. I also obtained a post master’s certification in acute care pediatrics in 2015.

Much of my nearly 10 years as a nurse practitioner I have spent working in pediatric general surgery and trauma. This has provided me with such a strong foundation and has been a very valuable experience. I am so excited to be a part of the Mainstreet Pediatrics team! It is so important to me that you and your family are very confident in your child’s provider and that you have an excellent interaction with each visit. I strive to provide the best care possible and work within a patient and family-centered model. It is important to make decisions as a team that will best support your child and their continued growth and development!

We moved to Denver in December 2017 from Texas. My husband, my 1-year-old son, our golden retriever, and I all love the lifestyle Denver has to offer! We love hiking, talking afternoon walks, and exploring all the fun restaurants and events in Denver.

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