Top billers · Clinical Laboratories · Maryland

What are the biggest clinical labs in Maryland?

In 2024, 56 clinical laboratories billed Medicare for laboratory testing in Maryland: 4,583,340 services and an estimated $84.2M in Medicare payments. Below: the top 5 by service volume, straight from CMS's public billing data.

56
Clinical labs billing Medicare (2024)
4,583,340
Services billed
$84.2M
Est. Medicare paid
↓ 8%
Providers vs 2023
The list

The top 5 clinical laboratories in Maryland.

Ranked by 2024 Medicare service volume across the family's codes.

#ProviderSpecialtyCityServicesEst. Medicare paid
1Quest Diagnostics Incorporated MDClinical LaboratoryBaltimore2,143,825$25.0M
2Diamond Medical Laboratories, Llc.Clinical LaboratoryOwings Mills444,430$3.3M
3Capital Diagnostics LLCClinical LaboratoryLaurel351,156$1.3M
4Cirrus Dx, Inc.Clinical LaboratoryRockville328,574$11.6M
5Meritus Medical Laboratory LLCClinical LaboratoryHagerstown274,089$3.2M

That's the top 5. 51 more clinical laboratories billed laboratory testing in Maryland in 2024. The full ranked list, with year-over-year history, group affiliations, and phone numbers, is one search in Prospect 811.

See the full list
The breakdown

What's behind the number.

Top codes in Maryland

80053Blood test, comprehensive group of blood chemicals330,983
85025Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count296,030
87798Detection test by nucleic acid for organism, amplified probe technique279,386
80061Blood test, lipids (cholesterol and triglycerides)214,016
83036Hemoglobin a1c level168,785
84443Blood test, thyroid stimulating hormone (tsh)159,839

Top specialties billing it

Clinical Laboratory56 providers

Where the laboratories are

Baltimore14 providers
Frederick5 providers
Rockville5 providers
Gaithersburg3 providers
Columbia2 providers
Where these numbers come from. Everything on this page is computed from CMS's public Medicare Provider Utilization & Payment data for 2024, the most recent year CMS has released. It covers traditional Medicare fee-for-service only (no commercial insurance, no Medicare Advantage). CMS suppresses any provider-and-code line with fewer than 11 beneficiaries before publishing, so low-volume billers don't appear at all. "Est. Medicare paid" is each billing line's average Medicare payment multiplied by its service count, summed. One service is one billed test or service line as CMS reports it. Prospect 811 organizes public data; it doesn't add to or alter it. Not affiliated with or endorsed by CMS. Full detail on the data page.

This is one code family, one state, one year.

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