Company lists · Data refreshed September 2026

Top 25 Diagnostic testing companies based in Irvine, United States

Name: Diagnostic testing companies based in Irvine, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 37 companies tracked

RevenueBase identified 37 diagnostic testing companies headquartered in Irvine, United States as of September 2026 and tracks 1,120 professional contacts across them, including 610 with verified work emails. San Diego is the largest hub.

This list covers diagnostic testing companies headquartered in Irvine, United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 19, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 19, 2026 86% judged on-target in blind review

37Companies

1,120Contacts tracked

610Verified emails

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The 25 largest diagnostic testing companies based in Irvine, United States

Ranked by team size

Top 25 of 37 diagnostic testing companies based in Irvine, United States, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to diagnostic testing companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Mdxhealth	Partial evidence	Irvine, CA, United StatesHQ checked Sep 19, 2026	201-500	273 contacts →
	Partial evidence “Mdxhealth is a multinational healthcare company that provides actionable molecular diagnostic information to personalize the diagnosis and treatment of cancer.” Source: RevenueBase Database · checked Sep 19, 2026
2	Pathnostics	Strong evidence	Irvine, CA, United StatesHQ checked Sep 19, 2026	201-500	195 contacts →
	Strong evidence “Established in 2011 in Irvine, California, Pathnostics is a leading precision diagnostic testing and development company providing solutions for infectious disease and cancer…” Source: RevenueBase Database · checked Sep 19, 2026
3	Nitto Avecia Pharma Services	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 19, 2026	51-200	100 contacts →
	Indirect evidence “Nitto Avecia Pharma Services is your single source for analytical services for the pharma, biotech, and medical device industries.” Source: RevenueBase Database · checked Sep 19, 2026
4	Fluxergy	Partial evidence	Irvine, CA, United StatesHQ checked Sep 19, 2026	51-200	86 contacts →
	Partial evidence “Fluxergy was founded 10 years ago with a vision to democratize the world of laboratory testing, by making testing more accessible and affordable.” Source: RevenueBase Database · checked Sep 19, 2026
5	Craif INC	Partial evidence	Irvine, CA, United StatesHQ checked Sep 19, 2026	51-200	46 contacts →
	Partial evidence “Craif is a molecular diagnostics company leveraging miRNA and machine learning for early cancer detection.” Source: RevenueBase Database · checked Sep 19, 2026
6	Biomerica, INC	Partial evidence	Irvine, CA, United StatesHQ checked Sep 19, 2026	51-200	45 contacts →
	Partial evidence “Biomerica, is a global biomedical company that develops, manufactures and markets advanced diagnostic products used at the point-of-care (in home and in physicians’ offices) and…” Source: RevenueBase Database · checked Sep 19, 2026
7	Healthquest Esoterics	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 19, 2026	51-200	37 contacts →
	Indirect evidence “HealthQuest Esoterics is a licensed and accredited full-service medical reference laboratory with an extensive test menu of specialty assays.” Source: RevenueBase Database · checked Sep 19, 2026
8	Monarch Diagnostics	Strong evidence	Irvine, CA, United StatesHQ checked Sep 19, 2026	51-200	35 contacts →
	Strong evidence “Monarch Diagnostics is a diagnostic testing laboratory committed to delivering accurate, timely results that support recovery-focused care.” Source: RevenueBase Database · checked Sep 19, 2026
9	Emeritusdx	Partial evidence	Irvine, CA, United StatesHQ checked Sep 19, 2026	51-200	30 contacts →
	Partial evidence “EmeritusDX is a cancer diagnostics company that is driven by our obsession to continuously improve patient care.” Source: RevenueBase Database · checked Sep 19, 2026
10	Burning Rock DX	Partial evidence	Irvine, CA, United StatesHQ checked Sep 19, 2026	501-1,000	24 contacts →
	Partial evidence “Burning Rock Biotech Limited (NASDAQ: BNR ) Burning Rock Biotech is a global diagnostics company specializing in next-generation sequencing (NGS) technology for precision oncology.” Source: RevenueBase Database · checked Sep 19, 2026
11	Bridge Diagnostics	Partial evidence	Irvine, CA, United StatesHQ checked Sep 19, 2026	51-200	23 contacts →
	Partial evidence “Bridge Diagnostics is a national healthcare services company providing clinical diagnostic information, clinic workflow solutions, population health management tools, and…” Source: RevenueBase Database · checked Sep 19, 2026
12	Bach Diagnostics	Partial evidence	Irvine, CA, United StatesHQ checked Sep 19, 2026	51-200	23 contacts →
	Partial evidence “Bach Diagnostics is a clinical pathology laboratory based out of Irvine, California.” Source: RevenueBase Database · checked Sep 19, 2026
13	Researchdx	Partial evidence	Irvine, CA, United StatesHQ checked Sep 19, 2026	11-50	23 contacts →
	Partial evidence “ResearchDx is a Contract Diagnostics Organization (CDO) for the biopharmaceutical and diagnostic industries.” Source: RevenueBase Database · checked Sep 19, 2026
14	Dxome Clia Laboratory	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 19, 2026	51-200	15 contacts →
	Indirect evidence “Dxome is a leading multi-omic technology innovator, manufacturer, and lab service provider with a CLIA and CAP accredited lab in Irvine, CA.” Source: RevenueBase Database · checked Sep 19, 2026
15	Artemis DNA	Partial evidence	Irvine, CA, United StatesHQ checked Sep 19, 2026	51-200	12 contacts →
	Partial evidence “Artemis DNA is a full service, Clinical Laboratory Improvement Amendments (CLIA) certified, College of American Pathologists (CAP) accredited, high-complexity clinical diagnostic…” Source: RevenueBase Database · checked Sep 19, 2026
16	Cleanquest Laboratory	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 19, 2026	11-50	11 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
17	Shoreline Diagnostics	Partial evidence	Irvine, CA, United StatesHQ checked Sep 19, 2026	1-10	11 contacts →
	Partial evidence “Full-spectrum PCR molecular diagnostics laboratory serving clinicians and healthcare providers across the country.” Source: RevenueBase Database · checked Sep 19, 2026
18	Cellum Biomedical INC	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 19, 2026	1-10	9 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
19	Mountain View Medical Laboratory	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 19, 2026	51-200	8 contacts →
	Indirect evidence “At Mountain View Medical Laboratory (MVML) we are dedicated to providing comprehensive and state-of-the-art clinical laboratory services to our providers, patients and partners.” Source: RevenueBase Database · checked Sep 19, 2026
20	Exceldx Laboratories,. LLC	Partial evidence	Irvine, CA, United StatesHQ checked Sep 19, 2026	11-50	8 contacts →
	Partial evidence “Exceltox is a CAP-accredited, CLIA-certified laboratory offering advanced clinical and genetic testing services” Source: RevenueBase Database · checked Sep 19, 2026
21	Pacific Medical Laboratory INC	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 19, 2026	1-10	8 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
22	Think20 Labs	Strong evidence	Irvine, CA, United StatesHQ checked Sep 19, 2026	11-50	6 contacts →
	Strong evidence “As a disruptive force in the diagnostic testing industry, Think20 Labs is bringing consistency and integrity to analytical testing.” Source: RevenueBase Database · checked Sep 19, 2026
23	Gnosis DX	Strong evidence	Irvine, CA, United StatesHQ checked Sep 19, 2026	51-200	5 contacts →
	Strong evidence “We believe in connection at Gnosis - knowing we are the link to the future standard of clinical diagnostic testing and screening excellence.” Source: RevenueBase Database · checked Sep 19, 2026
24	Oncocyte Corporation	Partial evidence	Irvine, CA, United StatesHQ checked Sep 19, 2026	51-200	3 contacts →
	Partial evidence “Oncocyte™ is a precision diagnostics company with a mission to improve patient outcomes by providing personalized insights that inform critical decisions throughout the patient…” Source: RevenueBase Database · checked Sep 19, 2026
25	Ihdlab	Partial evidence	Irvine, CA, United StatesHQ checked Sep 19, 2026	51-200	2 contacts →
	Partial evidence “IHDLab is a CLIA/FDA registered full service clinical laboratory, specializing in testing for fertility, FDA donor, STI/STD, weight management, cardiac care, and preventative…” Source: RevenueBase Database · checked Sep 19, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: diagnostic testing companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names diagnostic testing companies.
Partial evidence: Its own public description names part of diagnostic testing companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name diagnostic testing companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 37 diagnostic testing companies based in Irvine, United States

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Diagnostic testing companies based in Irvine, United States at a glance

As of Sep 19, 2026

54.5%Verified-email coverage

30.3Average contacts per company

51-200Median size (employees)

121.6%Largest-city concentration · San Diego

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

Email recency for this list is measured across the whole United States list rather than for Irvine, so it is reported there. Company counts and contact totals on this page are exact for Irvine, over 37 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among diagnostic testing companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Irvine, United States whose own description of what they do matches “diagnostic testing companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names diagnostic testing companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among diagnostic testing companies, and records with no verified work email. Companies headquartered outside Irvine are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 610 across the full list. 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 September 19, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Diagnostic testing companies by metro in the United States

Diagnostic testing companies in San Diego45
Diagnostic testing companies in Houston42
Diagnostic testing companies in Irvine37
Diagnostic testing companies in New York37

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names diagnostic testing companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many diagnostic testing companies are there based in Irvine, United States?

RevenueBase identified 37 diagnostic testing companies headquartered in Irvine, United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Mdxhealth, headquartered in Irvine, tops this list with the largest team on record.

Which city has the most diagnostic testing companies?

San Diego leads with 45 headquartered companies, followed by Houston (42) and Irvine (37).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 610 verified decision-maker contacts tracked across these 37 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 19, 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 Smart Search, 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.