Key Insights• The United States veterinary reference laboratory market is experiencing robust expansion, underpinned by a growing companion animal population and record levels of pet healthcare expenditure. According to the AVMA Pet Ownership and Demographics Sourcebook (2025) , the U.S. dog population reached 87.3 million in 2025, while the cat population grew to 76.3 million, compared with 73.8 million in 2024 and 59.8 million in 1996. 77.5 million U.S. households owned at least one pet in 2025, representing 58.6% of all households, an increase from 71.5 million households in 2016. Dog owners maintained an average of 1.6 dogs per household consistent since 1987 while the average number of cats per household declined from 2.2 in 1987 to 1.8 in 2025. According to the American Pet Products Association (APPA) , total U.S. pet industry expenditures reached $158 billion in 2025 , with veterinary services and products accounting for $41 billion of this total.• The U.S. veterinary reference laboratory market is characterized by a sophisticated healthcare delivery model comprising approximately 34,296 veterinary practices as of 2023, according to the U.S. Census Bureau. On average, approximately 362 new veterinary practices have been added each year since 2010, representing an annual growth rate of 1.3%.

According to the 2025 AVMA Report on the Economic State of the Veterinary Profession, corporate groups now own roughly 30% of U.S. practices and generate more than half of companion-animal revenue. Pet owners reported spending approximately $1,700 annually on their pets in 2025 , about $200 more than in the previous two years, with veterinary care accounting for 32.4% of total pet-related expenditures. Dog owners spent an average of $598 on veterinary care , cat owners spent $529, and other pet owners spent $552.• The U.S. Department of Agriculture's Animal and Plant Health Inspection Service (USDA APHIS) oversees the National Animal Health Laboratory Network (NAHLN) , a nationally coordinated network of animal disease diagnostic laboratories that detects biological threats to U.S. animal agriculture. Originally composed of 12 laboratories, NAHLN now includes 66 State, Federal, and University laboratories across 43 States. The National Veterinary Services Laboratories (NVSL) serve as the Nation's reference laboratories for NAHLN and the U.S.

Department of Agriculture (USDA). NAHLN laboratories can test large numbers of samples for specific diseases, including up to 450,000 PCR tests per week for avian influenza. In fiscal year 2025, NAHLN laboratories participated in surveillance programs for African swine fever, classical swine fever, antimicrobial resistance, bovine spongiform encephalopathy, foot and mouth disease, influenza A virus in swine, pseudorabies virus, and scrapie. Over 1.1 million PCR tests were provided by NAHLN laboratories for HPAI outbreak response.• Regulatory oversight for veterinary diagnostic services in the United States is administered through a multi-layered framework. The USDA APHIS establishes user fee rates for veterinary diagnostic goods and services, including services for imports and exports of live animals and animal products. The Food and Drug Administration (FDA) regulates in vitro diagnostic devices used in veterinary medicine under the Federal Food, Drug, and Cosmetic Act.

The Clinical Laboratory Improvement Amendments (CLIA) establish quality standards for all laboratory testing, including veterinary reference laboratories, ensuring accuracy, reliability, and timeliness of patient test results. The U.S. veterinary reference laboratory market is predominantly served by domestic and multinational manufacturers.Market Outlook• According to the research report, "USA Veterinary Reference Laboratory Market Outlook, 2031,” published by Actual Market Research, the U.S. Veterinary Reference Laboratory Market is expected to reach a market size of more than 2986 Million by 2031.• A defining characteristic of the U.S. veterinary reference laboratory market is the progressive modernization of diagnostic services within both academic veterinary medical centers and community-based veterinary practices. IDEXX Laboratories, the global leader in veterinary diagnostics, reported total revenues of $4.304 billion for the full year 2025, with fourth-quarter revenues of $1.091 billion, an increase of 14% compared to the prior year period. Reference Laboratory Diagnostic and Consulting Services accounted for approximately 18.5% of IDEXX's total revenue mix. The Companion Animal Group grew 15% as reported and 13% organic, driven by strong CAG Diagnostics recurring revenue.

Zoetis Inc., the world's leading animal health company, reported full-year revenue of $9.467 billion in 2025, with fourth-quarter revenue of $2.387 billion. These financial results reflect the substantial scale of outsourced diagnostic testing in the U.S. market.• Leading academic veterinary institutions, including the Cornell University College of Veterinary Medicine, University of California-Davis School of Veterinary Medicine, and Colorado State University College of Veterinary Medicine, are expanding their diagnostic capabilities through investments in advanced technologies, including next-generation sequencing, digital pathology, and artificial intelligence-assisted diagnostic interpretation. The American College of Veterinary Pathologists (ACVP) and the American Society for Veterinary Clinical Pathology (ASVCP) continue to advance diagnostic standards through board certification programs, continuing education, and research initiatives aimed at improving diagnostic accuracy and patient outcomes.• The market also reflects the U.S. healthcare system's growing emphasis on preventive care and early disease detection. The AVMA Pet Ownership and Demographics Sourcebook provides comprehensive data on pet populations, pet-owning households, pet owners, and pet acquisitions, as well as details on veterinary care visits and pet owner spending. The pet insurance penetration rate reached 4.3% in 2025, with dogs leading at 6% and cats at 2.3%, according to the North American Pet Health Insurance Association (NAPHIA). This translates to approximately 5.2 million insured dogs and 1.7 million insured cats, or nearly 7 million pets overall a record high, increasing 9% year-over-year and 76% over the past 5 years.

The USDA APHIS continues to enhance surveillance programs through the NAHLN network, which serves as a vital early warning system for foreign and emerging animal diseases. As digital health adoption accelerates across major veterinary institutions, remote monitoring and telemedicine are expected to become increasingly important in improving continuity of care.Market DynamicsDriver: Rising companion animal population and pet healthcare expenditureThe U.S. veterinary reference laboratory market is primarily driven by the growing companion animal population and corresponding increases in pet healthcare expenditure. With 87.3 million dogs and 76.3 million cats in the U.S. in 2025, and 77.5 million households owning at least one pet, the addressable market for veterinary diagnostic services is substantial. Pet owners reported spending approximately $1,700 annually on their pets in 2025, with veterinary care accounting for 32.4% of total pet-related expenditures. The pet insurance penetration rate reached 4.3% in 2025, enabling more comprehensive diagnostic testing. In-force gross written premiums reached a record $5.7 billion in 2025, reflecting the growing financial commitment of pet owners to their animals' health.

Over 34,000 veterinary practices serve this growing population, with approximately 362 new practices added annually since 2010. The increasing prevalence of chronic conditions in aging pets, including osteoarthritis, diabetes, renal disease, and cancer, is driving demand for routine and specialized diagnostic testing. As pet owners increasingly view their animals as family members with 79.5% of dog owners and 70.4% of cat owners considering their pets members of the family willingness to invest in advanced diagnostic services continues to grow. The veterinary molecular diagnostics market is experiencing particularly strong growth as PCR, next-generation sequencing, and digital PCR technologies become more accessible and affordable for routine clinical use.Challenge: Workforce shortages and regional disparities in veterinary diagnostic accessOne of the principal challenges facing the U.S. veterinary reference laboratory market is the uneven distribution of veterinary diagnostic infrastructure and the persistent shortage of veterinary professionals. According to the 2025 AVMA Report on the Economic State of the Veterinary Profession, while the number of veterinary practices continues to grow, certain productivity metrics were lower in 2024 than in 2023, reflecting changing economic conditions. The average number of active clients per practice has been declining since 2019 by about 95 clients per year, to a total of 3,351 clients in 2024.

Regional disparities persist, with specialized reference laboratory services concentrated in major metropolitan areas and academic medical centers, while many rural and underserved communities lack access to advanced diagnostic capabilities. An estimated 20 million pets live in underserved communities in the U.S., with 70% having never seen a veterinarian. The NAHLN network, comprising 66 laboratories across the country, works to address these disparities through coordinated federal and state partnerships. Budget constraints within veterinary practices can limit procurement of high-value reference laboratory services, and the market's dependence on specialized equipment and reagents exposes laboratories to supply chain disruptions. Together, these factors contribute to regional disparities in access to advanced veterinary diagnostic services and limit overall testing volumes in underserved areas.Trend: Expansion of molecular diagnostics and AI-assisted diagnostic interpretationThe U.S. veterinary reference laboratory market is experiencing a significant shift toward molecular diagnostics and artificial intelligence-assisted diagnostic interpretation. IDEXX Laboratories has been at the forefront of this trend, launching IDEXX Cancer Dx™ for canine lymphoma in 2025, representing a new phase of innovation in veterinary diagnostics.

The company also achieved meaningful adoption of IDEXX inVue Dx™ , delivering a quarterly record of instrument placements and 12% year-over-year expansion of IDEXX's global premium instrument installed base. The USDA APHIS has enhanced surveillance programs incorporating advanced molecular techniques through the NAHLN network. Over 80 percent of Level 1 NAHLN laboratories have in-house Biosafety Level 3 facilities. NAHLN routinely conducts emergency response scenarios and training exercises to ensure laboratories are prepared to respond to critical disease outbreaks. Leading reference laboratories are investing in AI-powered diagnostic platforms that enable faster, more accurate interpretation of complex test results, reducing turnaround times and improving diagnostic confidence. The growing emphasis on personalized medicine in veterinary care is also boosting the use of molecular diagnostics for genetic screening, breed-specific disease risk assessment, and targeted therapeutic monitoring.

Zoetis announced the opening of a new state-of-the-art reference laboratory in Louisville, Kentucky, in 2025, reflecting the ongoing expansion of reference laboratory infrastructure across the United States.Policies • USDA APHIS Veterinary Services User Fees: The USDA Animal and Plant Health Inspection Service establishes user fee rates for veterinary diagnostic goods and services, including services for imports and exports of live animals and animal products. The fee rates went into effect January 10, 2025. Testing for certain types of diseases must be performed at either the NVSL or other APHIS-approved facilities.• National Animal Health Laboratory Network (NAHLN) Framework: The NAHLN provides a framework for the coordination of federal and state animal disease diagnostic laboratory infrastructure, capabilities, and capacities. The network comprises 66 veterinary diagnostic laboratories across 43 States that support early detection testing, disease surveillance, outbreak response, and protection of the national food supply and public health. The NAHLN is a cooperative effort between two USDA agencies APHIS and the National Institute of Food and Agriculture (NIFA) and the American Association of Veterinary Laboratory Diagnosticians. NAHLN funds are a key component to rapid detection and response to animal disease outbreaks, maintaining international trade, and conducting biosecurity measures.• FDA Regulation of In Vitro Diagnostic Devices: The Food and Drug Administration regulates in vitro diagnostic devices used in veterinary medicine under the Federal Food, Drug, and Cosmetic Act.

Manufacturers of veterinary diagnostic tests and devices must comply with applicable regulatory requirements, including premarket notification (510(k)) or premarket approval (PMA) for higher-risk devices.• CLIA Quality Standards for Laboratory Testing: The Clinical Laboratory Improvement Amendments establish quality standards for all laboratory testing, including veterinary reference laboratories, ensuring accuracy, reliability, and timeliness of patient test results. Veterinary reference laboratories performing diagnostic testing must comply with applicable CLIA requirements.• State Veterinary Diagnostic Laboratory Oversight: State veterinary diagnostic laboratories operate under the oversight of state departments of agriculture and public health, with many laboratories participating in the NAHLN network. The NVSL provides proficiency testing services for several disease testing platforms to international laboratories by request. State laboratories play a critical role in disease surveillance, outbreak response, and protection of state and national animal health.• AVMA Clinical Practice Guidelines: Utilization of veterinary diagnostic services in the U.S. is increasingly aligned with evidence-based recommendations promoted by the American Veterinary Medical Association and supported by international clinical guidelines. The AVMA continues to advance diagnostic standards through research initiatives, continuing education, and advocacy for improved patient outcomes.Segment AnalysisUnited States Veterinary Reference Laboratory Market By Service Type• Clinical Chemistry represents the largest revenue-generating service category in the U.S. veterinary reference laboratory market due to the high volume of routine blood chemistry panels and metabolic profiling tests performed across companion animal and livestock healthcare settings. Clinical chemistry services are utilized for routine wellness testing, disease diagnosis, treatment monitoring, and pre-surgical assessment, with adoption concentrated within veterinary hospitals, specialty referral centers, and reference laboratories.

The growing emphasis on preventive care and early disease detection continues to drive demand for comprehensive chemistry panels. Veterinary hospitals typically perform complete blood count (CBC) and serum chemistry panels as part of routine wellness exams, with tests ranging from $75 to $150 per panel.• Immunodiagnostics represents a significant and rapidly growing service category, enabling rapid, accurate, and cost-effective detection of a wide range of infectious and chronic diseases in companion and livestock animals. Immunodiagnostic services include ELISA-based testing, serological assays, rapid test kits, and immunofluorescence, supporting infectious disease screening, vaccine titer monitoring, and endocrine disorder diagnosis. The prevalence of infectious diseases such as heartworm, Lyme disease, and parvovirus continues to drive demand for immunodiagnostic testing across the United States. The NAHLN network utilizes immunodiagnostic assays for surveillance programs, including ELISA testing for HPAI in dairy cattle, with 96,196 ELISA tests conducted in fiscal year 2025.• Hematology maintains a significant position within the U.S. market, driven by the fundamental role of complete blood count (CBC) analysis in routine and emergency veterinary medicine. Hematology services are utilized for the diagnosis of anemia, infection, inflammation, immune disorders, and hematological abnormalities, with adoption concentrated within veterinary hospitals, emergency clinics, and reference laboratories.

The increasing prevalence of hematological disorders in aging companion animals continues to support steady demand for hematology testing.• Molecular Diagnostics represents the fastest-growing service category in the U.S. market and is projected to grow at the highest CAGR. IDEXX Laboratories has been a key driver of this growth with the successful launch of IDEXX Cancer Dx™ for canine lymphoma in 2025 and meaningful adoption of IDEXX inVue Dx™. Molecular diagnostics have moved beyond niche applications to become a core pillar of clinical testing, enabling pathogen-specific identification, resistance profiling, and outbreak tracing through PCR, next-generation sequencing, and digital PCR technologies. The NAHLN network demonstrates the scale of molecular diagnostics, with capacity to perform up to 450,000 PCR tests per week for avian influenza. Over 1.1 million PCR tests were provided by NAHLN laboratories for HPAI outbreak response between February 2022 and September 2025.• Others encompasses microbiology, parasitology, anatomic pathology, urinalysis, and toxicology services. These specialized services are critical for comprehensive diagnostic workups and are typically outsourced to reference laboratories due to the specialized equipment and expertise required.

Parasitology testing remains essential for routine wellness screening, while anatomic pathology supports cancer diagnosis and surgical planning. Toxicology testing is increasingly important for food safety and export compliance in livestock production.United States Veterinary Reference Laboratory Market By Animal Type• Companion Animals represent the largest revenue-generating animal type segment in the U.S. veterinary reference laboratory market, driven by the large companion animal population and high pet healthcare expenditure. With 87.3 million dogs and 76.3 million cats and dog-owning households spending an average of $598 on veterinary care, companion animal testing represents the primary revenue driver for veterinary reference laboratories. The growing prevalence of chronic conditions, including osteoarthritis, diabetes, renal disease, and cancer, drives demand for routine and specialized diagnostic testing. Approximately 77.5 million U.S. households own at least one pet, with pet spending reaching $158 billion in 2025.• Livestock Animals represent a substantial and growing segment of the U.S. market. The U.S. has approximately 86.7 million cattle, 74 million pigs, and 5 million sheep, driving demand for herd health management, food safety testing, reproductive testing, and disease surveillance.

The USDA APHIS NAHLN network, comprising 66 veterinary diagnostic laboratories, conducts surveillance programs for foreign animal diseases, including African swine fever, foot and mouth disease, and highly pathogenic avian influenza. NAHLN-funded activities in fiscal year 2025 included African swine fever, classical swine fever, antimicrobial resistance, bovine spongiform encephalopathy, foot and mouth disease, influenza A virus in swine, pseudorabies virus, and scrapie. The NAHLN also provided significant testing support in response to the highly pathogenic avian influenza outbreak in poultry, wild birds, and cattle. Livestock producers are increasingly sending samples to reference laboratories to control outbreaks that threaten herd health and productivity.United States Veterinary Reference Laboratory Market By End User• Veterinary Hospitals and Clinics represent the largest end-user segment in the U.S. veterinary reference laboratory market. With approximately 34,296 veterinary practices and 362 new practices added annually, general practices increasingly outsource complex tests to reference laboratories to avoid the overhead of specialized equipment and staff. IDEXX Laboratories dominates the U.S. market for veterinary clinics with reference laboratory services accounting for approximately 18.5% of total revenue.

Corporate groups now own roughly 30% of U.S. practices and generate more than half of companion-animal revenue, further consolidating reference laboratory purchasing decisions. The average veterinary practice generated approximately $1.5 million in gross revenue in 2024.• Research Institutes represent a significant end-user segment. Academic veterinary institutions, pharmaceutical research organizations, and animal-health research institutions rely on reference laboratories for advanced molecular testing, genetic analysis, and disease surveillance studies. Research institutes demand research-grade analytics and specialized testing services, driving demand for high-complexity reference laboratory testing. The USDA ARS and National Institutes of Health continue to fund veterinary research programs that require reference laboratory support. The NAHLN network includes university-associated laboratories that provide diagnostic development, training, and research support.• In-House Laboratories represent a complementary channel.

Veterinary practices and animal-health facilities maintain internal laboratory capabilities for routine testing, utilizing reference laboratories for specialized, confirmatory, high-complexity, or testing services that cannot be efficiently performed internally. Point-of-care and in-house testing is growing rapidly due to technological advancements, though reference laboratories remain essential for complex and high-volume testing. The in-house channel is primarily used to calculate the outsourcing rate, not double-counted as market revenue. IDEXX's Vet Lab Consumables segment, representing in-house laboratory consumables, accounted for 19.4% of total revenue in 2025.United States Veterinary Reference Laboratory Procedure Economics• Veterinary reference laboratory testing in the United States represents a critical component of comprehensive veterinary care, requiring specialized equipment, trained personnel, quality control, and timely reporting.• IDEXX Laboratoriesthe market leader, reported total revenues of $4.304 billion for the full year 2025, with Reference Laboratory Diagnostic and Consulting Services accounting for approximately 18.5% of total revenue. Companion Animal Group revenues grew 15% as reported, reflecting strong demand for reference laboratory services. Zoetis Inc. reported full-year revenue of $9.467 billion in 2025, with diagnostics representing a growing portion of the company's portfolio.• In veterinary hospitals and clinics, the cost of a comprehensive diagnostic workup including clinical chemistry, hematology, and immunodiagnostics ranges from approximately $150 to $500 depending on the complexity of the test panel, geographic location, and laboratory pricing.

The average cost of the last veterinary visit in 2025 was $200, up from $147 in 2024 and $190 in 2023. Routine diagnostic tests include blood work ($75-150), urinalysis ($30-60), and x-rays ($100-300). Molecular diagnostic tests, including PCR panels and genetic testing, typically range from $50 to $200+ per test.• In research institutes, the cost of advanced molecular testing and genetic analysis varies widely depending on the complexity of the assay, sample volume, and research protocols. Academic institutions often negotiate volume discounts and research pricing with reference laboratories. The NAHLN network receives federal funding to support diagnostic testing for foreign animal diseases, reducing costs for participating laboratories.• In-house laboratory testing represents a competitive channel, with point-of-care analyzers enabling rapid results for routine tests. However, reference laboratories remain essential for specialized, high-complexity, and confirmatory testing that cannot be efficiently performed in-house.

The increasing adoption of advanced diagnostic technologies is expected to improve diagnostic accuracy and reduce the need for repeat testing, improving long-term cost-effectiveness.Considered in this report• Historic Year: 2020• Base year: 2025• Estimated year: 2026• Forecast year: 2031Aspects covered in this report• Veterinary Reference Laboratory Market with its value and forecast along with its segments• Various drivers and challenges• On-going trends and developments• Top profiled companies• Strategic recommendationBy Service Type• Clinical Chemistry• Hematology• Immunodiagnostics• Molecular Diagnostics• Others By Animal Type• Companion Animals• Livestock AnimalsBy End User• Veterinary Hospitals and Clinics• Research Institutes• In-House Laboratories.