Sandra Peak, MD

Pediatrician

Cook Children's Pediatrics (Lewisville/Castle Hills)

1600 FM 544, Suite 100
Lewisville, TX 75056

Main phone number icon 817-347-2860

Fax number icon 682-303-9918

5.0 out of 5

Read verified patient reviews

Languages icon Language(s): English

Accepting new patients icon Accepting new patients

Meet Dr. Sandra C. Peak

While other little girls hosted tea parties, a young Sandra Peak, M.D, opened a "clinic" and forced her brother to either be a nurse or the parent bringing in dolls to be bandaged. So it's certainly no surprise that she grew up become a pediatrician and care for kids.

"I chose pediatrics because, at least for me, it was the one place in medicine where I felt I could truly change a person's life—and I could do that simply by educating their parents," Dr. Peak said. "Plus, kids are truly amazing! They have a natural empathy that I identify with. The best parts of my job are the hugs, high fives, giggles and eye rolls ... plus an unlimited supply of lollipops.

Wait, eye rolls? Yes. Dr. Peak has the kind of humor that inspires good-natured eye rolls from her family. In spite of their eye rolls, she adores them. She calls her husband, Jay, "an amazing man whose selfless dedication to our family inspires me every day." She says her stepson, Sage, is a constant source of hilarity and keeps her and her husband on their toes.

"It's easy to identify with kids ... especially when, in your heart, you're still a kid too," Dr. Peak said. "The secret is putting yourself in their place. Remembering how big and scary and wonderful and mysterious the world seemed when you were little."

Earning a B.A. degree in English and psychology from Baylor University helped Dr. Peak communicate with the children she treats today. After Baylor, she followed her passion and attended medical school at University of Texas Health Science Center in San Antonio. Her pediatric residency was at Arkansas Children's Hospital in Little Rock, where she participated in Angel One emergency helicopter transport service. While there, she also received the Jocelyn Elders Award for excellence in community service. Dr. Peak returned to her home town of Dallas in 1998 and established a pediatric practice in neighboring Carrollton, Texas. She joined Cook Children's Physician Network in Lewisville in 2004.

But she didn't stop there! She's also an associate professor at TCU's medical school, where she is helping to shape the future of medicine through her teachings. In 2022, she become a Director of Primary Care for Cook Children's Physician Network. When asked about all her commitments, she will tell you that she is always learning new things that ultimately help her to continually stay on top of the latest in pediatric medicine and grow as pediatrician. In her spare time, Dr. Peak enjoys gardening, Pilates, and boating. She can often be found at the lake with Jay, Sage and the world's most amazing Labs, Indiana "Indy" Jones and Luke.

Services

Acute illnesses
Chronic condition management
Developmental problems
Disease prevention
Flu shots
Hearing screens
Injury treatment
Obesity and weight management
Vision screens
Patient and parent education
School and sports physicals
Vaccines and immunizations
Well checks

Reviews

Average rating:

5.0

Questions were addressed	5 5 (72)
Provider explained things clearly	5 5 (72)
Likelihood of recommending this provider	5 5 (72)
Trust/confidence in physicians	5 5 (72)

What our families say

September 15, 2026

[...] at the front office and Dr. Peak herself! They are just so wonderful and make the appointments so easy going for myself and my kids. Dr. Peak is 10/10!!!!
September 15, 2026

All good experiences here, they really care about my children and listen to me.
September 13, 2026

Dr. Peak is always amazing!
August 23, 2026

Everybody in the office were very friendly and professional. We love Dr Peak!!
August 09, 2026

Dr. Peak is the absolute best Dr. There is we genuinely hope that she will be practicing until both of our children come of age.
August 01, 2026

Love Dr. Peak. Been with her since my first born. She's the best.
July 24, 2026

I think Sandra Peak is one of the nicest, kindest and most gentle physicians ever. She remembers things she asked my kids, their responses and shows interest in them as people. They love her office
June 24, 2026

I love Doctor Peak! She listens, provides history and context for the screenings and care she provides. I appreciate her so much.
June 24, 2026

Dr Peak helped me understand next steps in introducing milk at 12 months and how to encourage more food.
June 23, 2026

All good!
June 23, 2026

Dr peak is a wonderful provider and so amazing with our kids, I truly trust her and want to recognize that dedication she has.
June 13, 2026

Dr. Peak has always been amazing! She continues to do so as my children grow into their teenage years. I trust her judgement and advice.
June 10, 2026

My children love Dr.Peak. She is so personable, caring, funny and really makes my kids feel special. We all love her professionalism and dedication to our kids and their well being.
June 10, 2026

Dr. Peak has awesome energy, and shows she genuinely cares. It's because of her personality and passion and advice that both of my kids want to peruse a career in medicine. Thank you Dr. Peak!
June 04, 2026

Dr peak is amazing with my children. She was also my husbands pediatrician so it's always nice to catch up with her.
June 04, 2026

Always excellent.
May 28, 2026

Today's visit went smoothly. In the past, the wait time was much longer, but at this recent visit, everything was done in timely manner. Thank you.
May 19, 2026

I just appreciate the ease of being able to get sick child in same day, how knowledgeable Dr Peak is and how great she is with my girls. My kids even comment on it when we leave the office. It puts a lot of confidence in the care that is being given.
April 21, 2026

Everything was great.
April 21, 2026

Always a good experience when coming to Dr. Peak
March 26, 2026

Dr. Peak is an excellent doctor, I always feel very heard and options are throughly discussed. She is very proactive when it comes to anything that could be more serious.
March 21, 2026

Dr was great with [...]. Explained everything clearly, gave a good recommendation for one of our concerns. Thank you for everything
March 19, 2026

Dr Sandra Peak is the best pediatrician
March 15, 2026

Good love doctor peak
March 12, 2026

We just love Dr. Peak and the staff at the Cook Children's Lewisville location.
March 12, 2026

Always good experiences. Never bad ones.
March 10, 2026

The doctor she was amazing and was very helpful
March 10, 2026

I liked how they were very caring towards my daughter and didn't make her feel shame about her weight or height
March 01, 2026

Dr. Peak is the most amazing pediatrician. She's funny, relatable, makes my girls feel at ease, and most of all so incredibly knowledgeable. We love her so much.
March 01, 2026

From start to finish, every visit to this office is a positive experience.
February 22, 2026

Daughter hurt her leg and office accommodated us so we could get into office same day that I called.
February 22, 2026

We love Dr Peak! She always take times to listen to our concerns and explain to us what's going on in the body so we fully understand. Always a great experience each time we go to the office.
February 19, 2026

I recently switched pediatrician's for my newly one year old and I wished I chose Dr. Peak from the beginning! She was very friendly and you can tell she genuinely loves her job.
February 19, 2026

I was running late for our first appt and staff accommodated us. I truly appreciated because it's already a nerve wrecking experience, going to a pediatrician appt and then showing up LATE but they didnt make me feel bad for it and had a nice appt.
February 17, 2026

Love Dr.Peak for my kids!
February 12, 2026

We love this practice!
February 12, 2026

Dr Peak, [...] and [...] were such a pleasure. They made us feel so welcome and cared for.
February 05, 2026

It has always been a great experience here from scheduling to leaving. This practice and Dr. Peak are so wonderful.
February 05, 2026

Dr. Peak is such a phenomenal doctor. I always recommend peiple to her. The staff is always friendly and the office is always very clean. We are so happy we found this practice.
January 28, 2026

Dr Peak and her nurse were caring and we always have a great experience.
January 21, 2026

Dr Sandra Peak and her staff always provide a great experience when visiting and on calls. I have never encountered any rude staff. They are very caring and considerate.
January 06, 2026

Dr Peak always does a great job of explaining the issue to my son so he understands what's going on
December 27, 2025

I have good experience at all
December 11, 2025

Dr. Peak is amazing.
November 29, 2025

We did not have to wait long before being seen. My child was hesitant prior to seeing the provider due to [...] and discomfort in prior experience. But the staff at the office made the procedure easy and tolerable.
November 25, 2025

Very good
November 19, 2025

My daughter always looks forward to appointments with Dr. Peak. She raves about her all the time. She is an amazing doctor.
October 28, 2025

Dr. Peak is amazing and so attentive to our girls! Her staff is so polite; we love coming here!
October 28, 2025

All great visits, exceed expectations
October 19, 2025

The entire team did a wonderful job as usual.
September 25, 2025

All good experiences, we've gone through a lot the first two weeks of my child's life - Dr Peak really helped me feel grounded and guided our care.
September 25, 2025

We love [...] at the front desk! And Dr. Peak is just amazing! [...] always helps check us in and accommodate my child's needs and really listens to me. The whole team is awesome.
September 16, 2025

Dr. Peak and her team always does an amazing job with our children. The staff is always extremely friendly and never make me feel like I have a dumb question. As a newer parent this always put me at ease.
September 15, 2025

Dr peak always is amazing
September 06, 2025

Dr. Peak is supportive and informative about any issues our children encounters. Always provide best practice medicine.
September 06, 2025

Dr. Peak and staff are great!