Meet our Doctors

We would like to welcome of all our families, new and returning, to Pediatric Cardiology Medical Associates of Southern California, or “PCMA.’ We know that coming to a doctor’s office can be intimidating, and our staff’s goal is to create a comfortable and nurturing environment for you and your child. As part of this, we’d like your entire family to feel that their needs are met. Thank you for the opportunity and privilege to care for your child and family.

Timothy Casarez, M.D., FACC

David A. Ferry, M.D., FACC

Nancy Kim, M.D., FACC

Frederic Leong, M.D., FACC

Jeffrey A. Wong, M.D., FACC

About Our Staff

Cristina Mercado

Practice Manager

Cristina was born in Mexico, and raised in Southern California. She earned her Medical Assistant certificate from Watterson College in Pasadena, CA and then her Associates in Arts degree from Pierce Community College in Woodland Hills, CA. Cristina’s love for medicine began at the age of 15 when she started volunteering at her local community hospital, and for the past 18 years she has been serving the San Fernando Valley community. Cristina currently resides in Chatsworth with her husband and two daughters. In her spare time Cristina returns to her first love, charity work. She shows her passion for helping others daily by taking care of her PCMA families.

(818) 784-6269 ext 222
[email protected]

Viviana Cabrera

Patient Liaison for Timothy Casarez MD and David Ferry MD

Viviana has been part of the PCMA family for the past 23 years.  She first started as our Medical Assistant, and then promoted to the authorizations department. She has now come full circle and returned to her love of working closely with families and helping them schedule their imaging appointments, Cardiac Catherization’s and other Specialty Consultations. Viviana lives in North Hollywood with her son Anthony, and in her free time they enjoy outdoor activities, watching boxing matches  and eating Thai food.  Viviana works Monday- Friday 8:00am- 5pm her phone number is 818-784-6269 ext 218.  Please feel free to reach out to Viviana for any of your scheduling needs. Her email is [email protected]

Fabby Alvarez

Patient Liaison for Nancy Kim MD, Frederic Leong MD & Jeffrey Wong MD

Fabby comes to the PCMA family with 20years of Customer Service.  She was previously in the retail business which showed her how much she enjoyed helping people and forming a strong team environment. She will continue her true passion of helping others by working with families and helping them schedule their Imagaing appointments, Specialty Consultations as well as Fetal Medicine appointments. Fabby is the mother of six and lives in Van Nuys. During her free time she loves to spoil her two grandchildren and cooks the most delicious Mexican Food. Fabby works Monday- Friday 8:00am- 5:00pm, her phone number is 818-784-6269 ext 222.  Please feel free to reach out to Fabby for your scheduling needs.  Her email is [email protected]


Pediatric Cardiology Medical Associates of Southern California are pleased to offer services at the following hospital locations.

Children’s Hospital Los Angeles
Antelope Valley Hospital
Community Memorial Hospital in Ventura
Henry Mayo Newhall Memorial Medical Center
Los Robles Hospital
Northridge Hospital
Providence Holy Cross Medical Center in Mission Hills
Providence St. Joseph’s in Burbank

Providence Tarzana Medical Center
Simi Valley Hospital
St. John’s Hospital Oxnard
St. John’s Hospital Pleasant Valley
UCLA Mattel Children’s Hospital
Valley Presbyterian Hospital
Ventura County Medical Center
West Hills Hospital and Medical Center