What VDx Veterinary Diagnostics does

VDx Veterinary Diagnostics is a privately held veterinary diagnostic and preclinical research laboratory founded in 2001 in Davis, California, operating from a single headquarters and laboratory facility at 215 C Street, Suite 301. The company runs two distinct service lines from this base: (1) companion-animal diagnostic pathology — biopsy, cytology, PARR (PCR for Antigen Receptor Rearrangement) testing, flow cytometry, and immunohistochemistry — for referring veterinarians, specialty hospitals, and mobile specialists; and (2) GLP-compliant preclinical histopathology for pharmaceutical, biotechnology, medical device, and academic sponsors supporting FDA-regulated studies.

The laboratory is staffed by 11 ACVP board-certified veterinary pathologists with subspecialty depth in dermatopathology, oncologic pathology, ocular pathology, exotic animal pathology, and clinical pathology, and processes more than 30,000 specimens annually alongside 350+ cumulative GLP studies since founding. Technical differentiators include same-day cytology turnaround, next-business-day biopsy turnaround, proprietary PARR testing on formalin-fixed tissue (the only private non-academic U.S. lab to offer this, developed in collaboration with UC Davis's Leukocyte Biology Laboratory), whole slide scanning for digital pathology, and full FDA 21 CFR Part 58 GLP compliance with an independent Quality Assurance Unit.

Revenue mechanics combine per-specimen diagnostic fees billed monthly to veterinary clinics with custom-priced GLP study contracts (Statements of Work) for preclinical sponsors. Distribution is hybrid: courier pickup across most of Northern California, nationwide mail-in via FedEx/UPS (with shipping credits), and an enterprise field-sales motion via a dedicated Research Services Team for preclinical clients. Customer testimonials emphasize report detail, specialist accessibility by phone, and consistency of pathologist relationships as the primary purchase drivers, and the founder-CEO Dr. John Peauroi (former UC Davis VMTH Chief of Service and IDEXX Chief of Anatomic Pathology) continues to lead the company, with a new COO appointed in 2026 to professionalize operations.

Name

VDx Veterinary Diagnostics

Legal name

VDx Veterinary Diagnostics

Website

https://vdxpathology.com

Company type

Private

Founded year

2001

Operating status

Operating

Headcount range

51–100 employees

Short description

VDx Veterinary Diagnostics is a Davis, California–based veterinary diagnostic and GLP-compliant preclinical research laboratory, employing 11 ACVP board-certified pathologists and serving veterinary clinics, specialty hospitals, and pharma/biotech/medical device sponsors with biopsy, cytology, PARR, flow cytometry, and GLP histopathology services.

Ownership category

akta.pro rank

Product category

Veterinary Diagnostic Pathology Services

NAICS

Medical and Diagnostic Laboratories (62151)

SIC

Services-Medical Laboratories (8071)

akta.pro primary industry

Veterinary Anatomic Pathology (Histopathology & Cytology) (HLAMADAB)

akta.pro secondary industries

Reference Laboratory Testing (Clinical Pathology & Chemistry) (HLAMADAA), Oncology Diagnostics (Liquid/Tissue Biomarkers, Flow Cytometry) (HLAMADAJ)

Keywords

• Veterinary pathology services
• Preclinical histopathology
• GLP-compliant laboratory
• Biopsy and cytology diagnostics
• PARR clonality testing

Headquarters

HQ city

Davis

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Supply Chain, Marketing or Sales, Infrastructure

Revenue model

1. Veterinary Diagnostic Services: Veterinary pathology services including biopsy, cytology, PARR testing, flow cytometry, and immunohistochemistry. Revenue generated from per-specimen diagnostic fees. Clients billed monthly. Processes over 30,000 laboratory specimens per year from veterinary clinics and specialists.
2. Preclinical Research Services: GLP-compliant histopathology and pathology support for pharmaceutical, biotech, medical device companies, and academic institutions. Includes protocol development, necropsy support, histology processing, and comprehensive reporting. Revenue from study-based custom proposals and SOWs. Provides complimentary 30-minute study consultation for new clients.

Pricing tiers

Go-to-market motion2 records

Distribution channels4 records

Marketing channels7 records

Core offering

VDx Veterinary Diagnostics is a veterinary and preclinical pathology laboratory providing diagnostic histopathology, cytology, PARR testing, and flow cytometry for referring veterinarians, alongside GLP-compliant preclinical histopathology services for pharmaceutical, biotech, medical device, and academic research clients. The company operates with a team of 11 ACVP board-certified pathologists and processes over 30,000 specimens annually, delivering rapid turnaround (same-day cytology, next-business-day biopsy) and direct pathologist consultation.

Product overview

VDx Veterinary Diagnostics operates as a dual-service laboratory offering two primary product lines: (1) Veterinary Diagnostics, encompassing biopsy, cytology, PARR testing, and flow cytometry services for referring veterinarians; and (2) Preclinical Research Services, providing GLP-compliant histopathology support for pharmaceutical, biotechnology, and medical device companies. The company processes over 30,000 veterinary specimens annually with a staff of 11 ACVP board-certified pathologists. PARR testing on formalin-fixed tissue is a key differentiator, as VDx is the only private non-academic laboratory in the U.S. to offer this service.

Differentiator

Problem solved

Functional benefit

Products and services

• Veterinary Diagnostics Comprehensive veterinary pathology diagnostic services for referring veterinarians and specialty practices, including biopsy, cytology, PARR testing, and flow cytometry for companion animals. Processes over 30,000 laboratory specimens annually with ACVP board-certified pathologist reads and rapid turnaround (same-day cytology, next-business-day biopsy).
• Biopsy Services Histopathologic evaluation of tissue samples performed by ACVP board-certified anatomic pathologists with expertise in internal medicine, oncology, dermatopathology, and oral pathology. Results typically available the next business day from sample receipt.
• Cytology Services Microscopic examination of fine needle aspirates, fluid analysis, bone marrow analysis, and CSF samples. Cytology results available same business day of sample receipt, with STAT results available Monday-Saturday.
• PARR Testing (PCR for Antigen Receptor Rearrangement) Advanced PCR-based clonality testing for diagnosing lymphoma using PCR analysis of antigen receptor gene rearrangements. Performed on formalin-fixed tissue and cytology samples. VDx is the only private, non-academic laboratory in the U.S. offering PARR on formalin-fixed tissue, with assays developed in collaboration with UC Davis's Leukocyte Biology Laboratory.
• Flow Cytometry Immunophenotyping service for classification of hematopoietic neoplasia in dogs, using live cells in liquid suspension to identify cell lineage (lymphoid vs. myeloid, B cell vs. T cell) and aberrant protein expression. Results typically available same business day.
• Preclinical Research Services Full-service GLP-compliant histopathology laboratory providing support for medical device, biotechnology, and pharmaceutical research studies. Includes consultation, necropsy, histology processing, pathology evaluation, and comprehensive reporting, with a dedicated Research Services Team (RST) for study consultation, NDA/CDA review, and custom SOW development.
• GLP Histology Services FDA Good Laboratory Practices (21 CFR Part 58) compliant histology processing including standard paraffin embedding, routine H&E staining, advanced histochemical special stains (AFB, Alcian Blue, Amyloid, Gomori's Reticulin, Masson's Trichrome, PAS), and immunochemical stains (IHC/ICC).
• Consultation & Necropsy Services Protocol development, study design consultation, and necropsy support services for preclinical research clients. Available on-site at test facilities in the Sacramento area and across California and the U.S.
• Whole Slide Scanning Digital pathology imaging service converting glass slides to whole slide digital images for evaluation by VDx pathologists and remote consultation.

Quantifiable outcome

• 30,000+ laboratory specimens processed annually
• +4 more outcomes

Named customers6 records

Segments4 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

One partnership is on record.

• UC Davis Leukocyte Biology Laboratory (Dr. Peter Moore)coreTechnology or IntegrationVDx works closely with Dr. Peter Moore and the Leukocyte Biology Laboratory at UC Davis for PARR testing. They utilize an advanced set of primers developed in collaboration with this laboratory that allows increased sensitivity over earlier published reports. The primer set is continually undergoing refinement to improve the sensitivity and specificity of the assay.

Scale indicators6 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Inotiv: Inotiv is a contract research organization providing preclinical and nonclinical research services, including histopathology and toxicology pathology for pharmaceutical and medical device clients. Directly comparable to VDx's GLP-compliant preclinical histopathology service line.
• Marshfield Labs Veterinary Service: Marshfield Labs offers veterinary reference laboratory services including anatomic pathology for clinics and academic institutions. One VDx pathologist (Dr. Schulman) previously worked at Marshfield Labs, evidencing direct comparability in veterinary reference pathology services.
• Charles River Laboratories: Charles River is a leading global CRO offering preclinical research services including GLP-compliant histopathology and pathology support for pharma/biotech. Directly comparable to VDx's preclinical research business line; one VDx histology manager (Shelee Belasco) previously worked at Charles River.
• ZNLabs: ZNLabs (now part of Antech/Mars) was a regional veterinary reference laboratory providing anatomic and clinical pathology to veterinary clinics. Directly comparable specialty pathology service model to VDx; one VDx pathologist previously worked at ZNLabs.
• UC Davis Veterinary Diagnostic Laboratory: UC Davis's Veterinary Diagnostic Laboratory is an academic reference lab offering anatomic and clinical pathology services to veterinarians, with historical involvement in PARR testing research. Closely comparable to VDx in service offerings and serves similar veterinary specialist customers.
• Colorado State University Veterinary Diagnostic Laboratories: CSU's Veterinary Diagnostic Laboratories provide academic reference pathology and diagnostic testing for veterinary practitioners, including biopsy, cytology, and specialized testing. Comparable academic peer with similar scope to VDx's veterinary diagnostic offering.

Broad incumbents

• Antech Diagnostics: Antech (owned by Mars Petcare) operates one of the largest veterinary reference laboratory networks in North America, providing chemistry, hematology, pathology, and imaging diagnostics. Overlaps directly with VDx's veterinary diagnostic services but at much broader geographic and service-line scale; multiple VDx pathologists previously worked at Antech.
• IDEXX Laboratories: IDEXX is the largest U.S. veterinary diagnostics company offering reference laboratory services (IDEXX Reference Laboratories), in-clinic analyzers, and software across companion and livestock animals. VDx competes in the same veterinary pathology reference lab category but at a much smaller, specialist scale. Notably, VDx's founder Dr. Peauroi was formerly Chief of Anatomic Pathology at IDEXX.
• Zoetis Diagnostics: Zoetis is a major animal health company with a growing diagnostics business (including Vetscan and reference lab services). Comparable to VDx in offering veterinary pathology/diagnostics, but as part of a much broader pharmaceutical and diagnostics portfolio serving companion and livestock animal markets.
• Heska (now part of Antech/Mars): Heska provides veterinary diagnostic instruments and reference lab services, and was acquired by Antech (Mars Petcare). Overlaps with VDx's veterinary diagnostics offering but historically focused on in-clinic analyzers supplemented by reference lab testing; one VDx pathologist previously worked at Heska.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/vdx.diagnostics
• LinkedInlinkedin.com/company/vdx-veterinary-diagnostics-and-preclinical-research-services
• Instagraminstagram.com/vdx_path

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles18 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about VDx Veterinary Diagnostics