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Meet Your Team

Urology Department

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Division Chief

Luis R. Argueso, MD

Specialty Urology

Providers

Karen R. Dunivant, CPNP

Specialty Urology

Gwen M. Grimsby, MD

Specialty Urology

Michael T. Nguyen, MD

Specialty Urology

Kelly M. Parker, MSN, PA-C

Specialty Urology

Michael L. Ritchey, MD

Specialty Urology

Marilyn L. Tigges, PA-C

Specialty Urology

Carlos A. Villanueva Del Rio, MD

Specialty Urology

Michael K. Yap, MD

Specialty Urology

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Meet Your Team

Division Chief

Luis R. Argueso, MD

Providers

Karen R. Dunivant, CPNP

Gwen M. Grimsby, MD

Michael T. Nguyen, MD

Kelly M. Parker, MSN, PA-C

Michael L. Ritchey, MD

Marilyn L. Tigges, PA-C

Carlos A. Villanueva Del Rio, MD

Michael K. Yap, MD

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Please Note

Visitors and patients ages 2 years and up must be masked at all times at all Phoenix Children’s locations. For more information on universal masking, click here.