Advanced Veterinary DiagnosticsFor Dogs & Cats in Fairfax, VA
Timely, accurate diagnostics can make all the difference, from understanding why a sick pet isn’t feeling well to catching issues early in routine testing. At Mainstay Veterinary Practice (MVP), our diagnostic services allow us to quickly gather the information we need to make informed decisions, often the very same day.
By combining a full in-house diagnostic laboratory with advanced imaging and specialist collaboration, we’re able to support
wellness care,
sick and urgent visits,
surgery,
dental procedures, and ongoing medical management with clarity and confidence.
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Why Diagnostics
Matter
Diagnostics help us look beneath the surface. Many illnesses don’t show obvious signs right away, and routine testing often reveals changes before symptoms appear:
- Support preventive wellness care: Establish baselines and detect early disease during routine exams.
- Guide sick and urgent care visits: Identify the cause of illness and determine the most effective treatment plan.
- Enhance surgical and dental safety: Assess internal health before anesthesia and procedures.
- Monitor ongoing conditions: Track chronic disease and response to treatment over time.
A Broad Range of
Diagnostic Services
MVP offers a comprehensive selection of diagnostic tools to meet a wide range of medical needs. Many of these services are performed right here in our hospital, allowing for faster answers and quicker next steps, including:
- Comprehensive in-house laboratory testing
- Digital radiography (X-rays)
- Ultrasound imaging
- Echocardiography
- Diagnostic testing tailored to wellness, illness, surgery, and dental care

A Broad Range of Diagnostic Services
MVP offers a comprehensive selection of diagnostic tools to meet a wide range of medical needs. Many of these services are performed right here in our hospital, allowing for faster answers and quicker next steps, including:
Echocardiography
Ultrasound imaging
Digital radiography (X-rays)
Diagnostic testing tailored to wellness, illness, surgery, and dental care
Comprehensive in-house laboratory testing
Full In-House
Diagnostic Laboratory
One of the biggest advantages for our patients is access to a complete in-house diagnostic laboratory. This allows us to run many tests immediately, rather than waiting days for outside results:
- Bloodwork for wellness screening and illness evaluation
- Pre-anesthetic testing for surgical and dental procedures
- Monitoring of chronic conditions
- Rapid decision-making during urgent or time-sensitive cases
Because results are often available the same day, treatment plans can begin sooner.

Advanced Imaging Services
Imaging plays a vital role in understanding what’s happening inside your pet’s body. We offer multiple imaging options, with flexibility based on urgency and complexity.
Digital X-Rays
Digital radiography provides clear images of bones, organs, and internal structures.
- Images are typically reviewed by our veterinarians in-house
- X-rays can be sent to board-certified radiologists for additional interpretation when needed
Ultrasound
Ultrasound allows us to evaluate soft tissues and organs in real time.
- Often available the same day or within a few days
- Typically interpreted in-house by our veterinary team
- Outside consultation available when appropriate
Echocardiography
Echocardiograms provide detailed insight into heart structure and function.
- Performed to assess cardiac health and disease
- Images are reviewed by a veterinary cardiologist
- A detailed report is sent back to you and your MVP veterinarian to guide care

Fast Results,
Thoughtful Interpretation
Having diagnostics in-house means we can move quickly—but accuracy always comes first. Our veterinarians interpret results in the context of your pet’s overall health, history, and current concerns.
When additional expertise is helpful, we collaborate with board-certified specialists to ensure you receive well-rounded, reliable information.
Diagnostic Care That Supports Every Stage of Life
Whether your pet is here for a routine wellness visit, a sick or urgent concern, dental care, or surgery, diagnostics help us provide safer, more precise care. From early detection to advanced imaging, our diagnostic capabilities are an essential part of how we protect your pet’s health.
Let’s Find the Answers
Together
If your pet needs diagnostic testing or if you’d like to learn how diagnostics support preventive care, our veterinary team is here to help. Let’s turn questions into clarity and move forward with confidence.
Book an appointment using our online form or call our office at (703) 280-4588 to get started today.








































































































