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Pediatric Phenylketonuria (PKU) Program


Discovery Clinic - Pediatric Specialty Care
2512 Building -Third Floor
2512 S. 7th St.
Minneapolis, MN 55454


Appointment scheduling: (612) 365-6777

Infants, children and adolescents with phenylketonuria, hyperphenylalaninemia, maternal PKU syndrome, and disorders of biopterin synthesis/regeneration receive comprehensive specialty care by our multidisciplinary Pediatric Phenylketonuria (PKU) Clinic team. Adults with these conditions continue to receive the same high quality care through our Adult Phenylketonuria (PKU) Program.



  • Chester Whitley, PhD, MDMD, PhD
  • Kristi Bentler, MS, RN, PHN, CPNP

Genetic Counselors:

  • Cindy Pham Lorentz, MS, CGC

Metabolic Dietitians:

  • Dorothy Markowitz, RD, LD
  • Jenny Bock, RD, LD

Pediatric Neuropsychologist:

  • Christopher Boys, PhD, LP

Medication Therapy Management:

  • Jeanine Utz, PharmD, BCOP, BCPS

Conditions we provide specialty care for (but not limited to):

  • Phenylketonuria (PKU)
  • Hyperphenylalaninemia (Hyperphe)
  • Maternal PKU syndrome
  • Disorders of biopterin synthesis and regeneration



  • Lorentz, Cindy, MS, CGC

    • Genetic Counselor
    Clinical Interests
    • Congenital Adrenal Hyperplasia
    • Phenylketonuria
    • Inborn errors of metabolism

  • Whitley, Chester B, PhD, MD

    • Physician - Genetics and Metabolism
    Clinical Interests
    • Genetics
    • Phenylketonuria
    • Inborn errors of metabolism


Central Scheduling: 612.672.7422

Provider Referrals: 612.672.7000

Administrative Offices: 612.884.0600

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