Skip to content
(956) 668-0700


Dr. Paola D. Wiernik, MD

Dr. Paola D. Wiernik, MD


Board Certified Pediatrician

American Board of Pediatrics Member

American Academy of Pediatrics since Oct.1997 M.D. since May 1990

University of Buenos Aires, Argentina Clinical Faculty

UTRGV Physician Assistant Program Clinical Faculty

UTRGV Nurse Practitioner Program

Stefanie Rivera, NP

Stefanie Rivera, NP

Pediatric Nurse Practitioner

Paola D. Wiernik MD, PLLC proudly welcomes back Nurse Practitioner Stefanie Rivera.

Stefanie graduated from The University of Texas at Austin with a Bachelor of Science in Nursing and received her Master of Science in Nursing from The University of Texas Pan-American.

She lived and worked in Edinburg/McAllen from 2006-2017 before relocating back to Houston. Stefanie started her career at Rio Grande Regional Hospital in McAllen, TX as a Newborn/NICU nurse. After her post graduate education, she came aboard to practice alongside Dr. Wiernik from 2013 to 2017. Until November 2022 she worked at Park Plaza Pediatrics and NightLight Pediatric Urgent Care in the greater Houston area.

Stefanie is thrilled to be back to serve the needs of your children and watch them grow with you. As for the patients and families who know her, she is looking forward to seeing you all again.

Kristy E. Boyd Ochoa, PA

Kristy E. Boyd Ochoa, PA

Physician Assistant

Kristy graduated from the University of Texas Pan American in 2000 with a Bachelor’s degree in Biology.

In 2004, she obtained a second Bachelor’s degree in Physician Assistant Studies. After working in pediatrics for several years, Kristy received a Masters Degree in Physician Assistant Studies in 2008 in the 1st bridge program from the University of Texas Pan American. As of the beginning of 2018, she has been practicing as a Physician Assistant in pediatrics for over 14 years.

Health Care Provided by Mid-Level Providers/Physician Extenders


Our Clinic(s) often offer health care by Physician Assistants and Nurse Practitioners. If at any time you wish to see a Medical Doctor, please notify the front desk and we will be happy to assist you with this request.

Mid-Level Provider/Physician Extenders

In addition to physicians, you may encounter mid-level healthcare providers during an appointment at our facility.

These mid-level healthcare providers, also known as Physician Extenders (Nurse Practitioner, Physician Assistant, or Clinical Nurse Specialist) are a part of our care team and allow us to provide better service to our patients.

You may make your follow-up appointment with one of our Physician Extenders who work with your physician to provide medical care for you.

The Physician Extenders provide diagnosis and testing, start or modify treatment, refill prescriptions, meet educational needs and perform some procedures.

You will not always see the physician during your visit with our Physician Extenders.

However, please know that you are always able to schedule an appointment with your doctor should you desire.