Bringing Zest:

  • Saving Pediatrics

  • The Zest multidisciplinary ecosystem empowers pediatricians to be the doctors they dreamed and to partner with parents in creating the healthiest, best lives for their children.

  • Act with Nimble Innovative Grit

    We challenge the status quo and embrace challenges with hard work and creative thinking.

    Be Humble

    We are self-aware, realize we are human, are approachable, and partner in decision making.

    Grow Together

    We maintain a growth mindset. We are intentional. We have each other’s back by fostering deep, trusting, and mutually respectful relationships.

    Make them Smile

    We make kids, parents, and pediatricians heroes by making their dreams a reality. We embrace a family-centered work environment and care delivery model.

    Show Up and Own It

    We are engaged and focused. We listen intently, are understanding, and ask appropriate clarifying questions. We honor our commitments.

The Zest Team

Physician Imagined. Physician Founded. Physician Led. 

Our Physicians

  • A female healthcare professional smiling, wearing a white coat and blue scrubs, with a stethoscope around her neck.

    Ivette Cubas, MD

    Pediatrician

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  • A woman with shoulder-length blonde hair, blue eyes, and a bright smile, wearing a maroon patterned blouse against a white background.

    Hayley Hellstern, DO

    Pediatrician

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  • A middle-aged man with light brown hair and glasses, smiling, wearing a white lab coat, blue shirt, and yellow tie.

    Andrew Hertz, MD

    President, Co-Founder, Pediatrician

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  • A woman with straight brown hair, blue eyes, and a wide smile, wearing a green top against a white background.

    Megan Lynch-Ljubi, DO

    Pediatrician

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  • Portrait of a smiling woman with long, light brown hair, wearing a green top and a name badge, against a white background.

    Keili Mistovich, MD, MPH

    Co-Founder, Pediatrician

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  • A young man with short red hair, wearing a light pink, polka dot shirt and a dark blue bow tie, smiling at the camera.

    Michael Perisa, MD

    Pediatrician

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  • Head and shoulders portrait of a young woman with long brown hair and a friendly smile, wearing a patterned top with green and blue accents.

    Marisa Quattrone, MD

    Pediatrician

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  • Portrait of a woman with shoulder-length blonde hair, smiling, wearing a white jacket over a black top, against a plain white background.

    Lourdes Travieso, MD

    Pediatrician

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Our Clinical Support Professionals

  • A woman with curly brown hair smiling, wearing a blue denim shirt and earrings, against a white background.

    Bridget Bowling

    Certified Sleep Counselor

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  • A woman with blonde hair, wearing a floral blouse, beige vest, and orange earrings, smiling at the camera.

    Laura Cordero, RD

    Dietician

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  • A woman with shoulder-length blonde hair, blue eyes, smiling, wearing a red long-sleeve top, with arms crossed, against a white background.

    Nicole Hamed

    Certified Parent Coach

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  • A woman with long, straight blonde hair wearing a bright pink top, smiling at the camera against a white background.

    Jennifer Hyland, RD, CSP, LD

    Dietician

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  • A woman with short, light brown hair and a slight smile, wearing a gray blazer or jacket.

    Lauren Lasko, APRN, IBCLC

    Lactation Specialist

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  • A woman with long red hair smiling, wearing a dark blazer and white top.

    Ashley Poklar, PhD, Med

    Child Psychologist

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  • A young woman with blonde, wavy hair smiling at the camera, wearing a white t-shirt against a white background.

    Nicole Ryan Suppes, RDN, LDN

    Dietician

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Our Founders

  • A smiling man wearing glasses, a white lab coat, a blue shirt, and a yellow tie.

    Andrew Hertz, MD

    President, Co-Founder, Pediatrician

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  • A man in a blue suit and white shirt smiling at the camera, with a plain white background.

    Justin Mistovich, MD, MBA

    Co-Founder

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  • Professional woman with long, wavy, light brown hair, smiling, wearing a green top, and a necklace, against a white background.

    Keili Mistovich, MD, MPH

    Co-Founder, Pediatrician

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Our Advisors and Staff

Our Supporting Organizations

  • EO Accelerator logo with black and gold text and a speedometer icon.
  • Logo for Promise Venture Studio with colorful overlapping circles and a leaf design.

Our Collaborating Partners

Text on a white background reads 'A Poklar Ponders' in black uppercase letters.
Logo for Hawthorn Grove Childcare featuring a stylized tree and the name 'Hawthorn Grove Childcare' in a circular layout.
Logo of AmeriHealth Caritas Ohio, featuring a blue square with red wavy lines and the name in blue text.
The logo for Inspire Connections Therapy LLC with colorful text and a yellow sunburst design.
Logo of the Nurtured Foundation featuring a child sleeping in a green leaf and the foundation's name in green and black text.
A purple circular logo with the words 'nourishing littles' in white, surrounded by small pastel-colored flowers.
Logo for Andrews Osborne Academy featuring a shield with the letter 'A' on top and 'O' below, with the name 'Andrews Osborne Academy' underneath.
A circular logo with a smiling yellow crescent moon in the center. The moon has a black curved line for a mouth and a small black dot for an eye. The text "LITTLE SNOOZERS" arcs above the moon, and "PEDIATRIC SLEEP CONSULTANTS" arcs below in dark blue lettering.
Logo for The Nest Schools featuring handwritten-style text, a blue bird, two leaves, and two eggs in pink and blue.
Logo for Bright Futures Therapeutic Services with text and stylized figures reaching for stars.
Lila Lactation Services logo with stylized text.
Logo for TheraPeds Pediatric Therapy featuring the company name and a small stylized tree.
Logo with green hands holding a tree and the text "Empowered Connecting"
Graphic with the words "Nourish 2 Thrive" where the number 2 is stylized in beige and has a small green and tan pineapple crown
Logo for Wollemi Counseling with a light green leaf design and the text 'wollemi counseling' and 'find yourself again.'

Pediatrics is more than medicine.