The Nation's Largest
Outpatient-Exclusive
Veterinary Specialty Network
Animal Outpatient Specialty Network (AOSN) unites the nation's leading veterinary specialists across dermatology, ophthalmology, dentistry, oncology, surgery, and more, within a collaborative ecosystem built exclusively for outpatient veterinary specialty medicine.
Built for Specialists from Day One
A Multi-Specialty Vision
AOSN was founded on a simple conviction: outpatient veterinary specialists deserve a network designed entirely around their needs, not a hospital chain, not a general practice group, but a purpose-built platform where specialists lead and clinical autonomy is non-negotiable. Dermatology was the first specialty to prove this model could work at scale.
Based on a Proven Model
Animal Dermatology Group became the proving ground, four decades of growth into the world's largest unified veterinary specialty dermatology practice, with 100+ board-certified dermatologists across more than 70 locations. AOSN demonstrated that an outpatient-focused, specialist-led network doesn't just survive, it thrives. The result: nearly 100% doctor retention since 2022, the largest ACVD-approved private residency program in the country, and a model that elevates both the standard of care and the careers of the specialists who deliver it.
Today, AOSN operates dedicated, specialist-led networks in dermatology, ophthalmology, dentistry, oncology, surgery, and more, each one built from the ground up around the unique needs of that specialty. The same model. The same commitment to clinical autonomy. One network, multiple specialties, a shared mission to put specialists first.
What We Stand For
These values were forged in the dermatology clinics where AOSN began, and they guide every specialty, every location, and every decision we make across each specific specialty network.
Teamwork
We build an environment of open communication, trust, and shared purpose, across clinics, across specialties, and across every level of our organization.
Respect
We treat our team members, our partners, our referring veterinarians, and the families we serve with courtesy, dignity, and genuine understanding.
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Pioneering
We strive to lead in education, innovation, and the advancement of knowledge across every veterinary specialty we serve.
Integrity
We deliver honest, ethical care and operate with transparency, because the trust our partners and patients place in us is earned, not assumed.
Compassion
We honor the bond between people and their pets. Every clinical decision, every patient interaction, and every family conversation is guided by empathy.
Character
We bring intention and integrity to every interaction, with the patients we treat, the teams we build, and the specialists who trust us with their careers.
Our Specialties
Each specialty within AOSN operates as its own dedicated group, with specialty-specific leadership, resources, and clinical culture, while sharing the operational infrastructure, collaborative network, and values that make AOSN unique.
100+ board-certified dermatologists, 60+ locations in 24 states, the largest ACVD-approved private residency program, and a 40+ year legacy of leadership.
Explore Dermatology
Setting a new standard for veterinary dentistry through partnerships, residency programs, shared expertise and a commitment to outstanding patient care.
Explore Dentistry
Building a specialist-led veterinary ophthalmology network with founding partner opportunities for ACVO Diplomates.
Explore Ophthalmology
Uniting board-certified veterinary surgeons within a network where surgery is the mission, not a department.
Explore Surgery
Advancing veterinary cancer care through a specialist-led network built for medical oncologists, surgical oncologists and radiation oncologists.
Explore Oncology
Dedicated outpatient internal medicine within the AOSN network, providing advanced diagnostic and therapeutic care.
Explore Internal Medicine
Establishing the nation’s largest veterinary cardiology specialty group, bringing the specialist-first model to cardiac care.
Explore CardiologyThe People Behind the Network
AOSN is led by a team that combines decades of veterinary specialty leadership with deep operational expertise, people who understand what specialists need because they've built their careers alongside them.
Corporate Leadership
Steven Mrha
Chief Executive Officer
Steve leads AOSN's strategic vision and operational growth, building the infrastructure that supports specialist-led networks across every veterinary discipline.
Briah Carey
Chief Operating Officer
Briah brings operational leadership to AOSN, helping drive the systems and processes that allow specialty practices to focus on what they do best, delivering exceptional patient care.
Stephen Hui
Chief Financial Officer
Stephen oversees AOSN's financial strategy and operations, ensuring the network's growth is grounded in disciplined financial stewardship and long-term sustainability.
AOSN by the Numbers
What Makes AOSN Different
AOSN isn't a multi-specialty hospital chain or a general practice group that happens to include specialists. We are something entirely new, a network built exclusively by and for outpatient veterinary specialists, and that distinction matters.
AOSN is 100% focused on outpatient specialty medicine. No general practice. No emergency services. No competing priorities. Every resource, every investment, and every operational decision is built to serve specialists and the patients who need them.
We partner with specialty practices, preserving clinical culture, protecting team continuity, and ensuring that the identity you've built endures. Our model is designed to strengthen what already works while providing the infrastructure to grow further than you could alone.
Your patients, your protocols, your professional judgment. AOSN never dictates clinical decisions. We believe the best care comes from empowered specialists who are free to practice at the top of their training.
Each specialty within AOSN operates as its own dedicated group with specialty-specific leadership, resources, and clinical culture. We don't water down specialties into a generic platform, we build each one to thrive on its own terms.
Through residency programs, university collaborations, mentorship, and research, AOSN invests in the long-term health of every specialty we serve. We're not just building a network, we're strengthening the profession.
Ready to Learn More?
Whether you're a specialist exploring partnership, a practice owner considering your next chapter, or a veterinarian interested in career opportunities, we'd love to connect.
Explore Partnership
Learn how AOSN can support your specialty practice with operational resources, growth capital, and a national network of peers, while preserving the clinical culture and autonomy that define your practice.
Start the ConversationJoin Our Team
We're hiring board-certified specialists and support staff across every specialty in the AOSN network. Explore open positions and find where your career can grow.
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