Meet Our Doctors

About us and how we choose to practice child care.

Orlando Office &  Maitland Office

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Mariliz Borbon Bumgarner, M.D.

Board Certified since 2005

Medical School: Universidad De’ Costa Rica, Costa Rica.

Residency: All Children’ Hospital/ Tampa General, Tampa Florida.

Clinical Interest: Allergies (specially food allergies), Asthma.

Languages: English, Spanish

Prior to joining PACF Dr. Bumgarner was in private practice in Naples, Florida since 2008.

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Female doctor in white coat with stethoscope

Dr. Valdes

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Smiling female doctor in white coat with stethoscope

Willka

I am a dedicated healthcare professional with a strong international background. Originally trained as a physician in Venezuela, I now practice in the United States as a Nurse Practitioner. My diverse medical experience has strengthened my clinical judgment, cultural awareness, and commitment to delivering compassionate, patient-centered care.
Beyond my professional role, I am a proud mother, a dog lover, and someone who finds energy and balance through sports and time spent at the beach. I value genuine connection, and I truly enjoy interacting with my patients, supporting them, and helping them feel understood and cared for.
My goal is always to combine my medical knowledge with empathy to provide high-quality care that makes a meaningful difference in the lives of those I serve.

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Smiling doctor with stethoscope and white coat

Mittzy Mattei Riviera

My name is Mitzy Mattei Rivera. I am a Family Nurse Practitioner from Puerto Rico, and a proud mother of three and grandmother. My passion is caring for children and supporting the families who raise them. With both clinical expertise and personal experience guiding me, I strive to create a warm, understanding, and culturally sensitive environment where every child feels safe, valued, and cared for. My goal is to empower families, promote lifelong wellness, and make a positive impact in every life I touch.

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Specialties & Qualifications

Our Pediatricians treat children, infants, and adolescents. They are trained to meet the unique needs of children, through all of their developmental stages, as they grow and mature. Thank you for choosing and trusting us with your children.

Speciality: Pediatrics

Procedures:

  • ADHD evaluation and treatment
  • Blood Glucose and Hemoglobin monitoring
  • Care plans: Allergy/Asthma/ADHD/Obesity
  • Circumcision (newborns only)
  • Color vision evaluation
  • Dermabond and suture removal
  • Ear piercings (2months & up)
  • Hearing Evaluation
  • Immunizations including Flu and Covid (ages 12 & up )
  • Incision and Drainage
  • Fluoride treatment
  • Lead testing
  • Pulsox
  • Rapid testing for Strep/Mono/Flu/Pregnancy/Covid
  • RAST allergy testing
  • School form completion
  • Spirometry
  • Sports Physical
  • Staple Removal
  • Stitches
  • Tympanometry/audiometry
  • Urinalysis and Hemoccult
  • Wart removal
  • Well Child Care from newborn to 18 years old
  • Wound Care

A visit to the doctor can be Fun!

Let's break some myths and help children get comfortable with doctors.