Meet our team at Associated Pediatricians LLC! Please take a few moments to learn about our skilled practitioners and our friendly, nurturing staff.

At Associated Pediatricians LLC, we consider it both a great joy and responsibility to care for children. Most of us are parents ourselves, so we strive to be understanding and available to the families we are privileged to serve. We are honored that you have chosen us as your child's primary medical provider and are confident that you will be pleased with the quality of care and service that we can provide you and your family.

A vital part of our service to children begins with our outstanding staff who works hard to manage and maintain a professional, caring and supportive environment for our patients in a timely manner. Our doctors are lifelong learners. Not only have they received advanced medical training in pediatrics, they continually pursue ongoing education to stay abreast of the latest in child health care.

Your child's health is as important to us as it is to you. We look forward to providing you with excellent medical care your child deserves.

Our group of Board Certified pediatricians are on staff at Porter Memorial Hospital in Valparaiso. We also have affiliations with Children's Memorial Hospital in Chicago and Riley Children's Hospital in Indianapolis.

Susan L. Bishop, M.D.Susan L. Bishop, M.D.

Dr. Bishop was born and raised in Chicago, Illinois. She was a graduate of Northwestern University Honors Program in Medical Education in 1984 and Northwestern University Medical School in 1986. She completed her internship and residency at Children's Memorial Hospital in Chicago in 1989. She is a Diplomat of the American Board of Pediatrics. She remains on staff at Lurie Children's Hospital and is involved in the resident's training program. She has served on the board of the Porter County Health Department and the AIDS Advisory Council for the Valparaiso Schools. Dr. Bishop and her husband, Marc, have a daughter. She has been in practice locally since joining Associated Pediatricians in 1989.


Dianna W. Brogan, M.D.

Dianna W. Brogan, M.D.

Dr. Brogan was born and raised in the Michigan City area. She earned her undergraduate degree at Notre Dame where she met and later married her husband. She attended medical school  at Loyola Stritch School of Medicine. She completed her internship and residency at Children’s Memorial Hospital (now called Ann and Robert H Lurie Children's Hospital) in Chicago. After completing her residency, she worked as a hospitalist through Children’s Memorial and Highland Park Hospitals. She is a Fellow of the American Academy of Pediatrics, a Diplomat of the American Board of Pediatrics and on the Editorial Board of The Journal, “Child’s Doctor.” She is on staff at Lurie Children’s Hospital and holds the rank of Assistant Professor, Clinical Track at the Feinberg School of Medicine at Northwestern University and participates in the Private Practice Research Group. Dr. Brogan and her husband have two daughters and one son. They enjoy outdoor sports and family activities. Dr. Brogan joined Associated Pediatricians in 1998.

Pablo A. Bukata, M.D.Pablo A. Bukata, M.D.

Dr. Bukata was born in Argentina and moved with his family to Indiana when he was two years old. In 1992, he graduated Valedictorian from Wabash College. He attended Indiana University School of Medicine and was elected to the medical honors fraternity Alpha Omega Alpha. After receiving his medical degree in 1996, he began pediatric residency at Riley Children's Hospital in Indianapolis. During his training, he spent time with Associated Pediatricians in the Valparaiso and Portage offices. He is a Diplomat of the American Board of Pediatrics. In 1995, Dr. Bukata married Christine, his high school sweetheart. Christine was raised in Munster, Indiana and is a graduate of Valparaiso University. Dr. Bukata and his wife have two sons and a daughter. He enjoys spending time with his family, playing soccer and watching Star Trek and Star Wars. He is fluent in both English and Spanish. Dr. Bukata joined Associated Pediatricians in 1999.

Elizabeth K. Campbell, M.D.Elizabeth K. Campbell, M.D.

Dr. Campbell grew up with her family in LaPorte, Indiana. She received her B.A. in chemistry from DePauw University. She then attended Indiana University School of Medicine where she was elected to the medical honor society Alpha Omega Alpha. In addition, she was awarded the Lyman T. Meiks award for outstanding performance in clinical pediatrics. She completed her residency at The University of Utah and Primary Children's Medical Center in Salt Lake City, Utah. She is married to her high school sweetheart, Matthew, and together they have three children. In her free time, Dr. Campbell enjoys exercising, spending time with her family and attending and helping with her children's various sports and other activities.



Melissa L. Mueller, D.O.Melissa L. Mueller, D.O.

Dr. Mueller was born and raised in a suburb of Chicago. She received her B.S in Biopsychology and Cognitive Sciences from The University of Michigan. She then attended Lake Erie College of Osteopathic Medicine where she was elected to the medical honor society Sigma Sigma Phi. In 2009 she completed her residency at St. John Hospital and Medical Center in Detroit, Michigan. After completion of her residency she joined the faculty of St. John Children's Center as an attending physician. She was responsible for training pediatric residents, interns and medical students. While there she became the pediatric student site coordinator for Wayne State University Medical School. She was voted a top pediatrician in 2012. She is board certified in pediatrics and a member of the American Academy of Pediatrics. Dr. Mueller met her husband, Daniel, while in medical school and together they have one son. She enjoys reading, traveling and spending time with her family and their goldendoodle. Dr. Mueller joined Associated Pediatricians in 2015.

Amberly Z. Brewer, M.D.Amberly Z. Brewer, M.D.

Dr. Brewer was born on Long Island but grew up in Azle, Texas. She earned her bachelor's degree from Austin College in Sherman, Texas, majoring in psychology and biology. After finishing medical school at the University of Texas Health Science Center, Houston, in 2002, she moved to Kalamazoo, Michigan, completing her pediatric residency at Bronson Hospital, then associated with Michigan State University. Before coming to Associated Pediatricians, Dr. Brewer practiced in Crown Point for 13 years. She and her husband, Craig, have two sons, Samuel and Oliver, who keep them busy with hockey and soccer games all over the region. She enjoys spending time with her family, playing with her pooch Amy Winehound and participating in book club. Dr. Brewer joined Associated Pediatricians in 2018.


Amberly Z. Brewer, M.D.Joseph B. Lee, M.D.

Dr. Joseph Bokum Lee was born and raised in Chicago, IL. His parents are immigrants from South Korea. In 2009, Joseph graduated Northwestern University with a BA in psychology and Asian American Studies. In 2011, Joseph received a Master’s in the Art of Teaching from Dominican University, while also serving as a middle school science teacher at Parkside Community Academy. For his efforts, he has been featured on CNN and the Chicago Tribune. In 2015, Joseph graduated from Rush Medical College as an inductee into the Gold Humanism Honors Society and was awarded the Rush University Student Diversity and Inclusion Award. Most recently, Joseph graduated from the Harris School with a Masters of Public Policy and finished his residency Comer Children’s Hospital at the University of Chicago. He was the chair of the Illinois State Medical Society – Resident/Fellow Section, and also held the position of community representative of the Northside College Preparatory High School Local School Council. For his work across the city, he has been featured on ABC7 Chicago Salutes. Joseph is active in his church, loves to travel and exercise.


Amberly Z. Brewer, M.D.Nassali M Mugwanya, M.D.

Dr. Mugwanya was born and raised primarily in New Jersey though her family spent 6 years abroad in Thailand and Uganda when she was in elementary school. She attended Emory University where she received a B.S in Neuroscience and Behavioral Biology. During her years at Emory she researched in the Language and Learning Lab, a part of the Child Study Center, focusing on how children learn words. She then attended Rutgers New Jersey Medical School and stayed at Rutgers to complete her pediatric residency in 2019. During her free time Dr. Mugwanya enjoys trying new restaurants, travelling and spending time with friends and family, so much so that she decided to move Midwest to be closer to her sister and extended family. She is excited to join Associated Pediatricians and looks forward to being a part of the community!


Rhondalynn J. Sears, MSN, PNP-BC 

Rhonda Sears is a certified Pediatric Nurse Pactitioner with over 20 years pediatric nursing experience. The last 15 years of her career has been as a Pediatric Nurse Practitioner. Rhonda received her Associate Degree in Nursing from Purdue in 1990. She received her Bachelors and Masters Degree from Valparaiso University graduating with honors. Rhonda received her Family Nurse Practitioner Certificate in 1997 from Valparaiso University.

She is board certified as a Pediatric Nurse Practitioner as well as a Family Nurse Practitioner. She is a member of the National Association of Pediatric Nurse Practitioners and the Indiana State Nurses Association. Rhonda grew up in Merrillville. She is married to her high school sweetheart, Scott, who is an electrical engineer. They have three sons, Ryan, Matthew and Nicholas. She spends most of her free time at her children's sporting events. She also enjoys outdoor activities such as camping and hiking. She joined Associated Pediatricians in 2012.

Jennifer Campbell, CPNP

Jennifer Campbell is a Certified Pediatric Nurse Practitioner with over 20 years of pediatric experience. She graduated with a Bachelor of Science in nursing from Saint Mary's College in Notre Dame, Indiana in 1994. She worked in the Pediatric Intensive Care Unit at Rush Hospital in Chicago for 5 years while earning her Master's Degree in nursing at Rush University, graduating in 1998. Jennifer is a board certified Pediatric Nurse Practitioner and a member of the National Association of Pediatric Nurse Practitioners. She grew up in Whiting. She is married to Troy, who is a Gary Police Officer, and is the proud mom of three sons, Colin, Gavin and Cameron. She enjoys going to her kids' sports and band activities and scrapbooking


Virginia J. Angert, RN, MSN, PNP-BC, PMHS

Virginia Angert is a Board Certified Pediatric Nurse Practitioner with over 25 years of experience in pediatrics. She earned a Bachelor of Science in Nursing from Towson State University in 1994 and Master of Science degree from the University of Maryland in 1998. Her RN experience include pediatric oncology and bone marrow unit and general pediatrics units at Johns Hopkins Hospital in Baltimore, MD. Her previous NP experience includes newborn nursery, pediatric emergency department, as well as general outpatient pediatrics. Ginny is a certified Pediatric Primary Care Mental Health Specialist (PMHS). She also earned a Master of Science in Medical Informatics from Northwestern University in 2014. She is a member of National Association of Pediatric Nurse Practitioners and the Coalition of Advanced Practice Nurses of Indiana. Ginny lives in Valparaiso and enjoys photography, live music and travelling. Her favorite animal is the rockhopper penguin.