Company lists · Data refreshed November 2026

Top 25 Immunohistochemistry testing providers based in the United States

RevenueBase identified 130 company matches for immunohistochemistry testing providers associated with the United States as of November 2026 and tracks 3,436 professional contacts across them, including 1,162 with verified work emails. Hayward is the largest hub.

This list covers company matches for immunohistochemistry testing providers associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 6, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Nov 6, 2026 How this list was built
130Companies
3,436Contacts tracked
1,162Verified emails
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The 25 largest immunohistochemistry testing providers based in the United States

Ranked by team size
Top 25 of 130 company matches for immunohistochemistry testing providers based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchPine Brook, NJ, United StatesHQ recorded Nov 6, 2026201-500319 contacts →

Exact match

“With over 18 years of experience in the medical field.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchPacheco, CA, United StatesHQ recorded Nov 6, 202651-200273 contacts →

Exact match

“Biocare Medical, LLC is an innovator in developing and supplying world class automated immunohistochemistry instrumentation, and the full range of reagents for IHC lab testing.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchDallas, TX, United StatesHQ recorded Nov 6, 2026501-1,000260 contacts →

Exact match

“ProPath, a Sonic Healthcare USA Anatomic Pathology Practice, is the largest, nationwide, fully physician-operated pathology practice in the United States.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchLenexa, KS, United StatesHQ recorded Nov 6, 2026201-500244 contacts →

Exact match

“It’s so much more than a specimen.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchAlpharetta, GA, United StatesHQ recorded Nov 6, 202651-200142 contacts →

Exact match

“As a brand under Fulgent Genetics, Fulgent Oncology provides personalized cancer diagnostics services through CSI Laboratories and Inform Diagnostics, Fulgent Genetics…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchCarlsbad, CA, United StatesHQ recorded Nov 6, 2026201-500139 contacts →

Exact match

“Genoptix, a NeoGenomics Company Right Answer, Right Now Advancing positive outcomes in oncology through innovation, quality and service Oncology Expertise For almost 20 years…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchMaryville, TN, United StatesHQ recorded Nov 6, 202651-20067 contacts →

Exact match

“Molecular Pathology Laboratory Network (MPLN) has been at the forefront of laboratory medicine since its inception in 1989 and inspired the genesis of women’s health testing using…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchPlainview, NY, United StatesHQ recorded Nov 6, 202651-20065 contacts →

Exact match

“Founded in 1998 and based in Plainview, NY (Long Island), Acupath is a nationwide provider of sub-specialized anatomic pathology services focused on the following specialties…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchIndianapolis, IN, United StatesHQ recorded Nov 6, 202651-20064 contacts →

Exact match

“MiraVista Diagnostics is a full-service CAP and CLIA certified reference laboratory with a focus on developing and processing diagnostic tests for invasive fungal infections.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchRamsey, NJ, United StatesHQ recorded Nov 6, 2026201-50059 contacts →

Exact match

“PHILOSOPHY & BACKGROUND Founded in August 2009 Pathline Labs specializes in histopathology lab services.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchBrooklyn, NY, United StatesHQ recorded Nov 6, 202651-20057 contacts →

Exact match

“Accelerating scientific research and discoveries through the automation of histology and digital pathology solutions.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchEdison, NJ, United StatesHQ recorded Nov 6, 2026201-50057 contacts →

Exact match

“QDx Pathology is a national, independent, and full-service anatomical and molecular pathology laboratory dedicated to providing diagnostic excellence.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchSan Antonio, TX, United StatesHQ recorded Nov 6, 202651-20053 contacts →

Exact match

“Founded in San Antonio, Texas as one of the few international laboratories with the ability to offer cancer cytogenetics, molecular genetics and multicolor flow cytometry services…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchSanta Barbara, CA, United StatesHQ recorded Nov 6, 202611-5051 contacts →

Exact match

“At Bio SB quality, innovation, regulatory compliance, and customer satisfaction are our highest priorities.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchPleasanton, CA, United StatesHQ recorded Nov 6, 202651-20051 contacts →

Exact match

“Diagnostic BioSystems is a leading developer of specialty Immunohistochemistry reagents.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchPortland, OR, United StatesHQ recorded Nov 6, 202651-20050 contacts →

Exact match

“Kashi Clinical Laboratories (KCL) is a fully accredited clinical laboratory providing specialized solutions to academic institutions, biopharma, hospitals, long-term care…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchLexington, MA, United StatesHQ recorded Nov 6, 202651-20050 contacts →

Exact match

“For nearly three decades, StrataDx™ has been a leading anatomic pathology laboratory dedicated to providing physicians, patients and hospitals with unrivaled diagnostic services.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchWhite Plains, NY, United StatesHQ recorded Nov 6, 202651-20042 contacts →

Exact match

“Cairo Diagnostics is a full service hematopathology laboratory specializing in blood cancers, lymphomas and solid tumors molecular profiling.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchLawrence, MA, United StatesHQ recorded Nov 6, 202651-20034 contacts →

Exact match

“Hooke is a privately owned, founder-led preclinical CRO focused on rodent in vivo immunology.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchLexington, KY, United StatesHQ recorded Nov 6, 202611-5033 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchSecaucus, NJ, United StatesHQ recorded Nov 6, 2026n/a28 contacts →

Exact match

“We are the world’s leading provider of cancer diagnostics, with the most comprehensive capabilities in anatomic pathology and molecular diagnostics.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchClovis, CA, United StatesHQ recorded Nov 6, 202651-20024 contacts →

Exact match

“Sierra Pathology (or Pathology Associates) located in Clovis, CA provides the Central Valley with the highest quality laboratory service possible.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchBerkeley, CO, United StatesHQ recorded Nov 6, 202651-20024 contacts →

Exact match

“IMD Path is an Integrated Molecular Diagnostics Laboratory that enabling pathology and empowering oncology.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchPasadena, CA, United StatesHQ recorded Nov 6, 202611-5021 contacts →

Exact match

“OmniPathology is a physician-owned California professional medical corporation.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchBuffalo, NY, United StatesHQ recorded Nov 6, 202651-20020 contacts →

Exact match

“OmniSeq, an innovation of Roswell Park Cancer Institute, is a molecular diagnostic laboratory based in Buffalo, New York.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 25 of 130 immunohistochemistry testing providers based in the United States

See the full list, filter by size, metro and specialty, and access 1,162 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Immunohistochemistry testing providers based in the United States at a glance

As of Nov 6, 2026
33.8%Verified-email coverage
26.4Average contacts per company
11-50Median size (employees)
2.3%Largest-city concentration · Hayward
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
35
11-50
47
51-200
30
201-500
13
501-1,000
2
10001+
3

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 130 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with the United States whose business descriptions match “immunohistochemistry testing providers” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
Ranking
Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification
Every displayed company carries at least one verified work email. RevenueBase tracks 1,162 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh
This page's figures were pulled from the company graph on November 6, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “immunohistochemistry testing providers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many immunohistochemistry testing providers are there based in the United States?

RevenueBase identified 130 company matches for immunohistochemistry testing providers associated with the United States as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Sïparadigm Diagnostic Informatics tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most immunohistochemistry testing providers?

Hayward leads with 3 company records, followed by Los Angeles (3) and San Diego (3).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 1,162 professional contacts with verified work emails tracked across these 130 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 6, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.