Welcome To Mariwalla Pediatrics

Mariwalla Pediatrics is the leading pediatric healthcare provider for Long Island’s families. With over 40 years of experience, our practice offers a comprehensive range of services, including well and sick visits, sports physicals, immunizations, and in-office procedures. We are committed to providing you with excellent service while educating your child on every aspect of their health

Your Dedicated Pediatrician in West Islip

Raising happy and healthy kids is your top priority, and it's ours too. Our pediatric offices, located in West Islip, is a fun, welcoming space where kids feel comfortable and at ease. Our dedicated team of pediatricians and staff believes every child deserves personalized attention and care, and we take the time to get to know each family, building strong, trusting relationships that last. From routine well-child visits and same-day sick visits to essential immunizations and specialized pediatric care, we support every step of your child’s healthcare journey.

Two people reclining on a couch, smiling and cuddling with pillows and blankets

About Our Team

Locations Of Our Providers

Office 1: Dr. Nagpal, Dr. Mariwalla, Dr. Cerniello, Dr. Nandlal, Andrea Gibbons

Office 2: Dr. Zanolin, Dr. Pirraglia, Dr. Wolert, Kathleen Mccaroll

Our Providers

Dr. Rajesh Mariwalla, MD

Dr. Rajesh Mariwalla, MD

Office 1
Dr. Inderjeet Nagpal, MD

Dr. Inderjeet Nagpal, MD

Office 1
Dr. Christine Cerniello, DO

Dr. Christine Cerniello, DO

Office 1

Our Mission

At our practice, our mission is to provide compassionate, evidence-based pediatric care that supports the health and well-being of every child from infancy through adolescence. We are committed to partnering with families to promote healthy growth, prevent illness, and empower children to thrive. Through personalized care, open communication, and a welcoming environment, we strive to build lasting relationships founded on trust, respect, and excellence

Office Gallery

Empty classroom waiting area with colorful wall art, chairs, and a TV mounted on the wall.
Colorful alphabet mural made of decorated square tiles on a hallway wall beside green chairs.
Waiting room with green chairs in front of a jungle mural showing lions, a monkey, and plants.
Exam room with an exam table, countertop cabinet, and wall art in a clinical office

What Our Parents Are Saying

Michelle L

I have seven children ranging in age from 41 years down to 19 years, including one set of twin boys who are now 25. Dr. Mariwalla, Dr. Nagpal, and Dr. Cerniello have journeyed with us in health all the way through. Each and every doctor in this practice has taken a deep, personal interest in each of my children, and I have relied on their knowledge and expertise completely. Couldn’t help but leave a review as my youngest had his college physical this morning.#feelingblessed

Christina B

I love this office. They were recommended by a friend when I was pregnant and searching for a pediatrician. We met Dr. Mariwalla and loved her. Thankfully, we've only needed to go in for well visits but we have seen every doctor and have only had great experiences. We especially love Dr. Bobby and Dr. Mariwalla. They are gentle, calm and thorough. Happy to answer any questions you might have, especially regarding vaccinations. The receptionists and medical assistants/nurses are always professional and lovely.

We provide a wide array of pediatric services.

Woman kneels on grass, smiling at a child in a knit sweater and jeans in a leafy park.

Well Child Checks

Black right-pointing arrow icon on a white background

Well-child visits are key to keeping your child healthy and thriving! They’re also the perfect time to ask questions or discuss any concerns about your child’s health. Make sure to schedule these important check-ups at the recommended intervals—call our office early to secure a convenient appointment with your child’s trusted pediatrician. Learn More >

Sick Child Visits

Black right-pointing arrow icon on a white background

It’s important to have prompt medical attention that helps them feel better and gets them on the road to healing. We understand parents’ worry and offer same-day sick visits to quickly start the treatment your child needs.  Learn More >

Other Services

Black right-pointing arrow icon on a white background

In addition to comprehensive primary pediatric care, we offer a wide range of services to support your child's health at every stage of development. Our goal is to provide convenient, high-quality care for your family in one trusted medical home.

Learn More >