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Alliance | Gainesville, FL  Choose another location
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Quality pediatric care in your neighborhood

Book appointment (352) 335-8888

Welcome to our new website

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Introducing VaxFacts

A resource for families seeking reliable vaccine information

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We're Pediatric Associates! Providing kids healthcare in Gainesville

For more than 70 years, parents have been choosing us for their children’s healthcare. We support kids’ futures using evidence-based practices and the latest technologies to provide the highest quality of care.

(352) 335-9427

  • Monday: 8AM–7PM
  • Tuesday: 8AM–9PM
  • Wednesday: 8AM–9PM
  • Thursday: 8AM–9PM
  • Friday: 8AM–5PM
  • Saturday: 8AM–12PM
  • Sunday: Closed

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Visit our pediatric office

Pediatric Associates offers a warm, kid-friendly environment designed to ease anxiety and make every visit comfortable for both children and parents.

Our Office

Behavioral health

About 3 times more boys than girls are diagnosed with ADHD. See how our pediatrician can determine a treatment plan to help your child lead a happy and healthy life.

Learn more

Virtual visits

Not every health concern needs a trip to the doctor’s office. With the KidzDocNow app, your child can see a pediatrician with a video appointment right from the comfort of home.

Learn more

After hours & weekend visits

We’re here for the sniffles, fevers, and “uh-oh” moments—even on evenings and weekends.

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Meet our team

Olga Mas, MD, FAAP

Olga Mas, MD, FAAP

Board-Certified Pediatrician

Michelle Massias, MD, FAAP

Michelle Massias, MD, FAAP

Board-Certified Pediatrician

Katheryn Sarantos, MD, FAAP

Katheryn Sarantos, MD, FAAP

Board-Certified Pediatrician

Vanisha Amin, DNP

Vanisha Amin, DNP

Nurse Practitioner

Henry Rivera

Henry Rivera

Nurse Practitioner

Virginia Sue Shreve, FAAP, APRN, MSN, PNP-PC, BSN, RN

Virginia Sue Shreve, FAAP, APRN, MSN, PNP-PC, BSN, RN

Nurse Practitioner

A message from our Chief Medical Officer

At Pediatric Associates, we’re passionate about keeping Gainesville’s kids healthy and happy. Guided by our core values—Care, Accessibility, Reliability, and Excellence—we’re proud to support families like yours with trusted, innovative pediatric care. Whether you’re new or a long-time patient, thank you for trusting us. We look forward to being part of your health journey.

C. Rocky Slonaker, M.D., CHCO, FAAP 


A comprehensive resource for vaccines in 2026

A comprehensive resource for vaccines in 2026

Keeping your children safe is top priority, but the new schedule changes can be complex. Vaxfacts.info provides concise, pediatrician-supported clarity from our nationwide network of pediatricians and can help you make informed decisions on your child’s vaccine schedule.

Vaxfacts.info
Hear from our families

Perfect.

Perfect

Deisiane C.

She is such a comforting person & answers every question I could possibly think of.

Dr. Vanisha is AMAZING! She is such a comforting person & answers every question I could possibly think of. You can tell she genuinely cares about her patients. Any patient of hers is lucky!!

Amanda T.

Dr. Mas has always been so amazing with my kiddo.

Dr. Mas has always been so amazing with my kiddo. She’s always very kind, compassionate, knowledgeable, approachable, and sweet. We absolutely love her!

Missy

Dr. Messiah was so kind.

Can not recommend them enough. Dr. Messiah was so kind. Her medical staff was so sweet, considerate and compassionate with our new born.

Skyler K.

my boys have been going here since they were days old.

I love how kind everyone is my boys have been going here since they were days old, I highly recommend alliance Pediatrics!

Selah M.

She’s patient, caring, and truly listens.

I love everything about Alliance! The entire staff is great, and my daughter’s pediatrician, Dr. Vanisha Amin, is absolutely the best. She’s patient, caring, and truly listens. Every visit feels comfortable, and I always leave knowing my child is in good hands. I appreciate her so much and highly recommend her and the Alliance team!

Javae J.

The experience here is amazing.

The experience here is amazing. Everyone is friendly and welcoming. Mr. Henry does a great job interacting with my daughter and asking questions to get a full understanding.

Darius J.

Todos son muy amables.

(Translated by Google) Everyone is very kind, Dr. Mas always answers all my questions and is super affectionate with my twins (Original) Todos son muy amables, la Dr Mas siempre resuelve todas mis dudas y es super cariñosa con mis gemelos

Katherine D.

peace of mind regarding our choice for pediatricians.

As first time parents, we felt our newborn baby was given the utmost care and attention, giving us peace of mind regarding our choice for pediatricians. Thank you to Dr. Sarantos and the entire staff!!

John Y.

It is a pleasure to be in an environment where you feel you matter.

Ms Vanisha Amin and staff was amazing they met me immediately due to the nature of my visit and was very supportive and reassuring. It is a pleasure to be in an environment where you feel you matter I have had a relationship with Pediatric Alliance for 30 from my oldest and to now my youngest and have not had a bad experience. Thank you Dr Sarantos!!!!

Annette H.

Dr. Kathy listens to our issues and allows me to help in decision making when it comes to my son’s plan of care.

Dr. Kathy at Alliance pediatrics has been amazing since my son was born 8!years ago. She’s fast, efficient, thorough, intelligent, and most importantly PERSONABLE! Dr. Kathy listens to our issues and allows me to help in decision making when it comes to my son’s plan of care. (Within safe means of course). I would highly recommend this pediatric group to anyone looking for a pediatric provider as the other medical professionals are very knowledgeable and thorough as well.

morgan t.

son los mejores.

(Translated by Google) They are the best, very good (Original) Son los mejores muy buenos

Alien M.

el Dr Henry es muy amable.

(Translated by Google) They are always very attentive, and Dr. Henry is very kind; he always explains all my doubts. (Original) Siempre son muy atentos y el Dr Henry es muy amable siempre explica todas mis dudas

Yuremma C.

I feel so grateful that that’s where my son gets his medical care.

Dr.Kathy Sorantos is the most incredible doctor. She lights up the room with confidence, love, and care for my son every single time we have an appointment. Every time I leave Alliance Pediatrics, I feel so grateful that that’s where my son gets his medical care. The staff are so kind and so understanding. I could go on and on. This place ROCKS!

Kelly L.

I will go back to him.

Mr. Henry listened to my concerns and helped me care for my son the best with the best possible solution. I will go back to him, and recommend him without hesitation!

Linda H.

we absolutely love her.

Both of our kids see Dr. Sarantos and we absolutely love her!

Dave F.

appreciated the care and attention that Alliance Pediatrics has provided.

We have always appreciated the care and attention that Alliance Pediatrics has provided over the years with all four of our children.

Scott

they strive for excellence in service.

Excellent care and service. Thorough assessment by ARNP and all clinical support staff. We have been coming to this facility for the past 23 years and they strive for excellence in service.

Kwame A.

always does their best to make each visit as quick and easy as possible.

My child HATES going to the pediatrician. This office always does their best to make each visit as quick and easy as possible even when my child is screaming. The staff here is always amazing.

Laura L.

Dr Henry Rivera was great.

Dr Henry Rivera was great. He connected very well with my teenage boys and was thorough and approachable.

Angela B.

We accept most major insurances

Whether you have Medicaid, a Commercial & Employer Group Plan, or an Individual & Family Marketplace Plan, you’re covered and cared for.

View all insurances accepted

Keeping kids healthy in Gainesville

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Ready when you are

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