Office Administration Staff

Dr. Wanita Patterson DNP, APRN

Dave Russell, MBA, FACHE

Dave comes to us from seven years at Community Health Systems where he directed physician practice operations, financials and physician recruiting in Florida for more than 220 clinicians and 650 associates in 63 outpatient facilities. Prior to that, Dave was COO for four years at Deuk Spine and Viera Heart & Vascular and as Executive Director of their 501(c)(3) foundation promoting clinical research and education.

He also has experience in the tech sector where he worked with ACI Worldwide for a dozen years serving as president and COO and at First Data Corp where he was in sales, call center operations and strategic planning.

Dave earned his BS and MBA at Virginia Tech and is a board certified Fellow with the American College of Healthcare Executives.

He and his artist wife enjoy the loyal companionship of their Golden Retriever and feral Siamese cat, dinner with friends and the beautiful Florida sunsets. Dave says he has given up his penchant for custom bikes and now plays a little golf and is writing his second novel.

We look forward to his contributions to Digestive & Liver Center of Florida.


Dr. Wanita Patterson DNP, APRN

Jorge L. Martinez, BAA, MHSA

Jorge Martinez is the Director of Operations for DLCFL. He joined Digestive and Liver of Central Florida in 2020. He obtained his Bachelor's Degree from Catholic University of Puerto Rico and Masters Degree of Health Care Administration Services from Webster University.

Jorge Martinez is a Puerto Rican native and moved to Orlando in 2000.

Prior to working for Digestive and Liver Center of Florida, Jorge has over 14 years experience in Health Care Administration.

In his free time he is a Travel Baseball coach and enjoys run Jet Ski at the beach.


Dr. Wanita Patterson DNP, APRN

Larry Wagner

BOM, Business Office Manager

Larry possess eighteen years of experiences in healthcare revenue cycle and contracting accompanied by an MBA through Belhaven and an BSBA Finance through UCF.

Compassionate care and Helping the patient.


Olga Fernandez

Olga Fernandez

Olga Fernandez has been managing communications and front line scheduling for Digestive and Liver Center of Florida since August 2018. Born in Rio Piedras, PR and raised in Lawrence, MA, then moved to Orlando, FL in 2003.

Olga has experience in leadership, call management, team building, professional development, strategic implementation, and company collaboration. Prior to joining the practice, she managed projects with high ROI for pharmaceutical company. Trained and certified in leadership and six sigma.

In her free time she enjoys spending time with family and meeting new people.


Olga Fernandez

Nicole McElfresh

Nicole McElfresh has been managing and overseeing the marketing department as Marketing Director for Digestive and Liver Center of Florida since September 2019. She is a Pittsburgh native and moved to Orlando in 2003.

Nicole graduated from the University of Central Florida with a Bachelors in Communications.

Prior to working for Digestive and Liver Center of Florida, Nicole marketed for entertainment and home improvement companies.

In her free time she enjoys spending time with her daughter and going to the beach.


Olga Fernandez

Vivian Ortiz

Vivian possesses 10 years experience in healthcare revenue cycle management. She finds pleasure in working with others to achieve a certain objective on time while providing excellence. In her previous role, she improved the performance, operations and productivity of her department by 35%. Vivian demonstrates the utmost discretion and integrity while working with sensitive, confidential health information. She is passionate about providing excellent customer service as the needs of the patients are her priority and the reputation of the organization.

During her free time she enjoys bike riding with her children, and collects colorful sunrise or sunset portraits, one of nature's greatest shows.


Dorota Smsony

Dorota Smsony

With more than two decades of experience, Dorota possesses an uncanny ability to find a balance between clinical and administrative success. After obtaining her MBA from Warsaw University, Dorota pursued her further education and graduated with Magna Cum Laude with Master's Degree in Nursing, through Cleveland State University. Since then, she has become a Certified Nurse Executive through ANCC and she obtained Six Sigma Green Belt.

Aside from academic and professional credentials, Dorota's biggest strength lies in creating the type of environment that promotes trust, integrity, and accountability. She loves spending quality time with her two daughters, skating, swimming, and going to the park.