Dr.Clark pediatricians at Greensboro Pediatricians

William Clark, MD

Dr. William Clark came to Greensboro Pediatricians in 1995 after earning a bachelor’s degree from North Carolina State University and a medical degree from East Carolina University School of Medicine. He completed his residency in pediatrics at Virginia’s only freestanding pediatric hospital, Children’s Hospital of the King’s Daughters in Norfolk, Va. He is Board Certified with the American Board of Pediatrics.

Outside of the practice, Dr. Clark enjoys spending time with his family, tending his garden and traveling.


Mark Cummings, MD

University of North Carolina Chapel Hill graduate Dr. Mark Cummings comes to Greensboro Pediatricians with a medical degree at East Carolina University. He completed his pediatric residency at the University of Virginia, and he holds Board Certification with the American Board of Pediatrics.  Associate Clinical Professor of Pediatrics at UNC-CH School of Medicine.

“My favorite part about caring for children and expectant mothers,” says Dr. Cummings, “is visiting those newborns in the nursery. There’s nothing like it!”

Dr. Cummings speaks Spanish fluently, plays the guitar, runs and enjoys traveling. He and his wife, Emily, have three children (two daughters and a son).

Some fun facts you may not know:
Favorite Movies: Shawshank Redemption and Bourne Identity
Favorite Restaurant: Zoe’s Kitchen at Friendly Center
Favorite Teams: UNC and UVA
Favorite Books: The Lion, The Witch and The Wardrobe by C.S. Lewis, and Wild at Heart by John Elredge, Gospel by JD Greear
Favorite TV Shows: The Office, Parenthood, and Modern Family
Inspired by:  Jim Elliot, My brother


Genevieve Mack, PNP

Since graduating from the University of Pennsylvania with a bachelor’s degree in nursing, Genevieve Mack has pursued a career of excellence as a Pediatric Nurse Practitioner. In 1999, Genevieve completed her master’s in nursing, with a concentration in Pediatric Primary Care. She is an affiliate member of the American Academy of Pediatrics, serves as a Fellow of the National Association of Pediatric Nurse Practitioners, and is a Board Certified Pediatric Nurse Practitioner.

Genevieve’s particular area of medical interest is pediatric asthma, and she has served as a consultant for the Bureau of Primary Healthcare’s National Asthma Collaborative II. She has presented numerous times on primary care management of pediatric asthma, and regularly trains and mentors pediatric practices in the implementation of asthma management programs.

“My decision to enter pediatrics and pursue a specialty interest in asthma management,” says Genevieve, “comes from a three-fold passion for child health advocacy, the science of medicine and nursing and the art of healing.”

Genevieve enjoys spending her free time with her husband and two school-aged children. In addition, she holds a Black Belt in Tae Kwon Do and enjoys reading, painting and hiking.



Heather Martin, PAC

Greensboro Pediatricians Physician Assistant Heather Martin earned a bachelor’s in nutrition from Appalachian State University and completed a graduate internship at Winthrop University. Heather completed her schooling and training as a Physician Assistant at the University of North Texas Health Science Center.

In addition to her training as a PA, Heather is also a Registered Dietician and specializes in childhood nutrition.

Heather is an active member of her local church, Cornerstone Baptist Church, and enjoys spending much of her free time with family. Other interests include reading, piano, guitar and teaching spin classes.


Chris Miller, MD

Dr. Chris Miller holds a degree from the University of North Carolina Chapel Hill School of Medicine. He completed his residency at Mercy Hospital in Pittsburgh, Pa., and is Board Certified with the American Board of Pediatrics. Dr. Miller also belongs to the American Academy of Pediatrics, Greensboro Medical Society, North Carolina Pediatric Society and the National Medical Association.

“I decided to enter pediatrics as my medical specialty because I love developing relationships with families and watching kids grow. I want to have a positive impact on their lives.” In addition to his passion for pediatric medicine, Dr. Miller also enjoys mentoring future physicians.

Outside of his medical practice, Dr. Miller enjoys spending time with family and volunteering with Big Brothers Big Sisters. He spends his free time reading or watching movies and exercising.

Fun facts you may not know about Dr. Miller:
Favorite TV Shows: Game of Thrones, The Wire
On his Ipod/Ipad: Sade, Anita Baker, KRS-ONE, Public Enemy, Jazz, Old School Hip Hop
What He’s Reading: The Warmth of Other Suns, Family Properties, Predictably Irrational
Favorite Websites: The Atlantic, Grantland
First Job: assembling CD cases for Manheim Steamroller Christmas CD
Hidden Talent: Impressions
Favorite Sports Teams: Tarheels, Cowboys
Talent he would most like to have: play an instrument
Favorite Food: fresh pineapple
Favorite Restaurant: Stephanie’s
Hero: Martin Luther King
Bucket List: attend major sporting events, travel to every continent, publish a book
Favorite Movies: Menace II Society, Training Day, JFK, Rize, Hoop Dreams, Eve’s Bayou


Brian O’Kelley, MD

Dr. Brian O’Kelley came home to practice medicine. A native of Greensboro, N.C., Dr. O’Kelley completed his bachelor’s degree at North Carolina State University and his medical degree at the University of North Carolina at Chapel Hill. He completed his residency training in pediatrics at the University of Florida in Gainesville, Fla. Board Certified by the American Board of Pediatrics, Dr. O’Kelley is also a Fellow of the American Academy of Pediatrics.

“I chose pediatric medicine because I love working with children and their families.  It is such a wonderful privilege to be able to follow children from birth through each of their developmental stages.  Every child has their own unique personality, gifts and talents.  It’s fun to watch these traits emerge with the families we serve.”

Dr. O’Kelley’s wife is a Hematology/Oncology Nurse.  He has a daughter, a son, and a Labrador Retriever.  When not practicing medicine, Dr. O’Kelley enjoys spending time with his family, running, mountain biking, backpacking, home carpentry projects, and playing guitar.


Ronald Pudlo, MD

Chief of Pediatrics for Cone Health since 2010, Dr. Ronald Pudlo has practiced at Greensboro Pediatricians since 1990. Dr. Pudlo completed both his undergraduate and medical degrees at Northwestern University in Chicago, Ill. He completed his residency training at North Carolina Baptist University and holds Board Certification with The American Board of Pediatrics. Dr. Pudlo is also a Fellow with the American Academy of Pediatrics.

“I entered pediatrics,” says Dr. Pudlo, “because I spent many years working at various camps for children with disabilities – such as Muscular Dystrophy Association, Easter Seals Association, and others – and I loved the opportunities I had to care for these children.

Aside from his hidden hockey talent (he plays in two adult leagues!), Dr. Pudlo enjoys spending time with his wife Jean, a consultant to a non-profit organization, and volunteering his time and medical skill in the community. He is an active Quaker at New Garden Friends Meeting and spends his free time enjoying outdoor activities, such as hiking, fly-fishing, kayaking and more.

Fun facts you may not know:
Favorite TV Shows: Carolina Hurricanes games
On his Ipod/Ipad: Folk Music and podcasts
First Job: Burger King
Favorite Food: Thai or Vietnamese
His Hero: Pete Seeger
Bucket List: to see the Himalayas
Favorite Movies: Young at Heart or The Blues Brothers


Lawrence Puzio, MD

New Jersey native Dr. Lawrence Puzio brings a wealth of pediatric expertise to Greensboro Pediatricians. A graduate of Johns Hopkins University, Dr. Puzio did his medical degree and his pediatrics residency at Vanderbilt University Medical School. He holds American Academy of Pediatrics Board Certification and maintains interests in pediatric infectious diseases and wilderness medicine.

“I decided on pediatrics as my specialty because I love watching children and families grow,” says Dr. Puzio. “Children are both challenging and fun to work with, and I’m grateful for the opportunity to watch them grow through childhood. One of the greatest delights of practicing pediatrics is treating the children of former patients!”

Dr. Puzio approaches his free time with the same passion he brings to work. He has many interests, not the least of which is spending time with his wife, son and the family’s Animal Shelter rescue dog. In addition, Dr. Puzio loves to read and enjoys science, woodworking, antique restoration, mountain biking, and home improvement projects.

Dr. Puzio makes time to be involved in community affairs as well, including his church – Unitarian-Universalist Church of Greensboro – and is a supporter of Habitat for Humanity and Architectural Salvage of Greensboro.


Carmen Thomas, MD

Dr. Carmen Thomas joined Greensboro Pediatricians in August, 2013. She comes to us with a medical degree from the University of North Carolina School of Medicine and residency training at Duke University Hospitals. Her professional interests include research in medical conditions and well-child care.

“When people ask me why I chose pediatrics, I always tell them it’s because children are always learning and growing,” says Dr. Thomas. “I love it that they are inquisitive and curious, and I want to be a part of their growing process.”

Dr. Thomas is married to her husband Melvin and enjoys spending time with her nieces and nephews, watching movies and live theatre, reading fiction and spending time with extended family.

Some fun facts about Dr. Thomas:
Favorite TV Shows: The Following, Grey’s Anatomy, Once Upon A Time, Revenge, Strike Back
On her Ipod/Ipad: Candy Crush, Sony e-reader, Words with Friends
Talent I would most like to have: to be able to play piano and sing really well
Favorite Restaurant: anywhere that serves great Mexican food and PF Changs
Hero: my father
Bucket List: spend a month in Fiji or New Zealand
Favorite Movies: The Bad Seed, Berry Gordy’s The Last Dragon, That Thing You Do, Fools Rush In, August Rush, The Matrix, Dreamgirls, The Avengers


tucker head shot
Elizabeth Tucker, MD

After finishing medical school at Emory University School of Medicine, Dr. Tucker completed her pediatric residency at the University of North Carolina at Chapel Hill. She and her husband recently relocated to Burlington, NC.  She is Board Certified with the American Board of Pediatrics.  Associate Clinical Professor at UNC-CH School of Medicine.

“I chose pediatrics for so many reasons.  I love the honesty, resilience, and fresh insight on the world that children have.  I love getting to know parents and families and watching them grow together.  I am so thankful for the opportunity to be a part of that journey with families.  I really can’t imagine doing anything else.”

When she isn’t busy at work she loves spending time with her husband Jeff, and their black lab, Lola.  They love being outdoors and enjoy hiking, fishing, kayaking, camping both in the mountains and at the beach.  They also enjoy working together in the yard at home and going to church.

Some fun facts about Dr. Tucker:
Her first job: playing harp for weddings with her sister playing violin while only in the 5th grade
Talent I would like to have: to play the cello
Favorite Food: Greek or Mediterranean
Hero: My great grandmother who taught me to play piano.  She was a very independent and intelligent woman who studied piano in France, travelled the world on her own, grew beautiful flowers, fruits and vegetables in her garden, and made the world’s best fried chicken and strawberry rhubard pie.


Kelly Grant, FNP

Greensboro Pediatricians welcomed Kelly Grant, FNP in July of 2017.  Kelly earned her Bachelor of Science in Nursing from Vanderbilt University.  She received her Master of Science in Nursing from Columbia University.  She has 21 years of experience dedicated to children.  Kelly has 12 years of specialty practice in Pediatric Neurology.


Louise Twiselton, MD

After finishing medical school at East Carolina School of Medicine, Dr. Twiselton completed her pediatric residency at Eastern Virginia Medical School in Norfolk, Va.  She is board certified with the American Board of Pediatrics.  As well as, Associate Clinical Professor of Pediatrics at UNC-CH School of Medicine. The best thing about caring for children, says Dr. Twiselton, “is helping patients establish good eating and exercise habits during childhood. Teaching children to take care of their health from an early age goes a long way to a healthy adulthood.”

Dr. Twiselton has worked at Greensboro Pediatricians since 1995. She is married and has two daughters, not to mention the family schnauzer. “When people ask me what I like to do outside of work, time with my family tops the list,” she said. “After that, I love cooking and reading. I also love to travel. I was born in England, but have lived from Chicago to Belgium to North Carolina, so I suppose travel is in my blood!”

TMOM Seal 2013Nominated for Favorite Pediatrician in Greensboro

ResizedImage200200-TMOMSeal2013300x300Nominee & Finalist for Favorite Pediatrician in Greensboro

TMOM Seal 2012 Winner for Favorite Pediatricians in Greensboro