Meet Our Providers & Staff
Providers
Dr. Wesam Aziz, MD, MS, FACP, FAAHPM
Board-Certified in Internal Medicine and Hospice and Palliative Care, Owner, and Lead Physician
Dr. Wesam S. Aziz is a board-certified Internal Medicine physician and Hospice & Palliative Care specialist at ApexMed Primary Care Clinic. He provides comprehensive adult primary care with a focus on preventive medicine, chronic disease management, and personalized treatment plans tailored to each patient’s needs.
Dr. Aziz earned his bachelor in science at Quinnipiac University and his medical degree through the Fifth Pathway Program at New York Medical College and holds a Master of Science in Health Administration (MSHA) at University of Texas Dallas. He is a Fellow of the American College of Physicians (FACP) and a Fellow of the American Academy of Hospice and Palliative Medicine (FAAHPM), reflecting his commitment to clinical excellence and compassionate care.
Dr. Aziz is dedicated to building long-term relationships with patients and supporting their health at every stage of life.
Hear from Dr. Aziz about ApexMed Primary Care’s philosophy of care and more in his Boerne Radio interview:
Dr. Gregory Brown, MD
Board-Certified Internist
Dr. Brown joined ApexMed Primary Care in 2025, bringing a deep commitment to compassionate, non-judgmental care for every patient. He earned his medical degree from the University of Texas Health Science Center in San Antonio in 2006, followed by his residency in Internal Medicine in Albuquerque, New Mexico, which he completed in 2009. During the pandemic, he pursued and completed a 2-year fellowship at the prestigious Andrew Weil Center for Integrative Medicine.
Before becoming a physician, Dr. Brown worked as a registered nurse in the Austin HIV Clinic and at Austin State Hospital, and even earlier as a nurse aide — experiences that shaped his empathetic, patient-centered approach.
With roots in Central and South Texas (his father from Kerrville and mother from San Antonio), Dr. Brown has a lifelong love for the region and is excited to serve the San Antonio community. When he’s not in the clinic, you’ll likely find Dr. Brown immersed in his favorite outdoor pursuits: tending to garden projects near his home, exploring the greenbelt trails with his dogs, or working in his greenhouse (often with a little help — or supervision — from his cats!). He and his wife Hannah share a passion for travel, especially through medical missions to the Middle East, where they explore global medicines, foods, and cultures while giving back to communities in need.
Medical Staff
Pamela Nienaber, MSN ED, RN
Chief Nurse
Pamela brings over 25 years of rich experience in nursing to our team, with a strong background spanning adult and geriatric care. She joined ApexMed on September 1, 2025, and holds a Master of Science in Nursing with a focus on Nursing Education. In her role, she oversees the daily operations of the clinic, drawing on her expertise in nursing and facility management to ensure everything runs smoothly, efficiently, and with the compassionate, family-like touch that defines ApexMed Primary Care. Her leadership helps create the welcoming, relaxed environment our patients love — one where Availability, Empathy, and Patience are at the heart of every interaction.
Outside of work, Pamela is embracing a new adventure as she’s learning to be a good plant mom — tending to her indoor greenery and watching her collection grow!
Her guiding motto? “When you know better, you do better” — a reminder of her commitment to continuous growth, both personally and professionally. Pamela’s favorite way to recharge is simply hanging out with her kids, cherishing those precious family moments that keep her grounded.
Diego DeLeon, MA
Medical Assistant
Diego joined the ApexMed team on March 17, 2025, bringing 8 years of hands-on experience as a medical assistant with a strong focus on adult and geriatric care. As a Certified Medical Assistant, he excels in both administrative tasks and direct patient care, including blood draws, injections, and ensuring smooth clinic flow.
In his leadership role, Diego oversees patient care across various settings — from our primary care clinic to Assisted Living Facilities and Skilled Nursing environments. He prioritizes the best possible experience for every patient by managing scheduling, optimizing daily operations, and keeping everything running efficiently with compassion and attention to detail. His work directly supports our commitment to Availability, Empathy, and seamless continuity of care.
Outside the clinic, Diego stays active and energized with a passion for running, playing basketball, MMA (mixed martial arts), and most importantly, spending quality time with his family — his favorite way to recharge and stay connected.
His favorite motto? “If you aren’t first, you’re last” — a fun, motivational reminder of his drive to give every patient and task his absolute best.
Christina Martinez
Medical Assistant
Christina joined ApexMed Primary Care in 2025, bringing 15 years of dedicated experience in the medical field with both front- and back-office expertise. She is a Medical Office Specialist, certified in Phlebotomy & EKG, and a Certified Clinical Medical Assistant. Her key strengths include patient care, medication reconciliation and Rx refills, reviewing lab results, patient follow-up calls, phlebotomy, and in-office lab specimen collection.
Outside of work, Christina loves to collect lotions and finds her greatest happiness being with her kids. She’s currently in school pursuing her RN degree, driven by a desire to grow and serve even more deeply.
Her inspiring motto? “With God All Things Are Possible.” This faith fuels her perseverance and compassion every day.
Executive Staff
Steve Sepko
CEO
A proud San Antonio native, Steve joined Apex Healthcare in 2020 and brings over 25 years of healthcare leadership experience, with deep expertise in operations and strategic initiatives. He holds a Bachelor of Science in Healthcare Administration from Texas State University and a Master of Business Administration from Texas A&M Commerce.
In his role as CEO, Steve oversees the daily operations of the Apex Family of Businesses, ensuring our commitment to high-quality, compassionate care remains at the forefront while driving growth and efficiency to better serve our community.
Outside of work, Steve enjoys golfing, traveling, and cherishing time with his wife of 31 years and their two children — moments that keep him grounded and inspired.
His favorite motto? “Be kind, for everyone you meet is fighting a hard battle.” — Ian Maclaren. This guiding principle reflects his dedication to compassion in both professional and personal life.
Steve is deeply passionate about community involvement, particularly fighting food insecurity — believing no one in our community should go hungry — and supporting our veterans through various initiatives and volunteer efforts.
Steve embodies the leadership and heart that make ApexMed Primary Care feel like family. We’re grateful for his vision and dedication to providing exceptional care right here in San Antonio!
Michael Guertin
CFO
A dedicated Army veteran, Michael joined Apex Healthcare in 2023, bringing over 20 years of experience helping small businesses grow through financial discipline and innovative reporting. He holds a Bachelor of Business Administration in Accounting and an MBA in Management Accounting from the University of Texas at San Antonio and is both a Certified Public Accountant (CPA) and Certified Internal Auditor (CIA, Inactive). He previously served as the interim leader of the organization’s medical billing company.
As Chief Financial Officer, Michael leads financial strategy, reporting, and accounting functions across the Apex Family of Businesses. He is passionate about building strong systems and scalable processes that align with our vision to lead in healthcare. For Michael, success is measured not just by financial performance, but by the experience and satisfaction of the patients we serve.
Outside of work, Michael enjoys creating music and was a piano player during his time in the Army. His favorite motto, “Fall seven times, stand up eight,” reflects the resilience, accountability, and perseverance that guide both his leadership and his life.
Anna-Lisa Solis
VP of Operations
Anna-Lisa joined Apex Healthcare in 2024, bringing more than 30 years of experience in the non-clinical business side of the medical field. She excels in strategic operations leadership, organizational optimization, financial management, performance management, and talent leadership — skills she uses to keep our practice running smoothly and efficiently so our clinicians can focus on delivering exceptional patient care.
Her main drive? “You need it done and I do it” — a perfect reflection of her hands-on, results-oriented approach. One of her key contributions has been developing our HR program, helping build a supportive, high-performing team that embodies our Apex values.
Her guiding motto says it all: “Building systems that allow clinicians to do their best work.” This philosophy ensures our operations support compassionate, thorough care for every patient.
Outside the office, Anna-Lisa is a passionate foodie who loves to cook. She’s also actively involved with the Spanish Cultural Institute, preserving cultural heritage through events and community engagement.
Dezmon Metze
Director of Business Development
Dezmon Metze is dedicated to building strong, lasting partnerships within the medical community and expanding access to high-quality primary care. With a focus on relationship management, provider outreach, and community engagement, Dezmon works closely with specialty offices, healthcare professionals, and local organizations to ensure seamless coordination of care for patients. He is passionate about clear communication, ethical collaboration, and creating referral networks that support better outcomes while helping practices and patients stay connected to the services they need.
Marcelle Settles
Welcome Coordinator
Marcelle Settles takes pride in creating organization, clarity, and efficiency behind the scenes to support both leadership and the overall patient experience. She assists with scheduling, coordination, and administrative operations, helping ensure that daily workflows run smoothly and effectively.
She values professionalism, attention to detail, and clear communication, and strives to contribute to a welcoming, supportive environment for patients and team members alike. Her goal is to provide dependable, thoughtful support that allows the clinic to deliver the highest standard of care.
Our team embodies the Apex spirit, ensuring empathetic and ethical care.