Top billers · Drug Testing · California

Who bills drug testing in California?

In 2024, 447 providers billed Medicare for presumptive and definitive drug testing in California: 515,219 services and an estimated $71.1M in Medicare payments. Below: the top 5 by service volume, straight from CMS's public billing data.

The list

The top 5 drug testing billers in California.

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

#	Provider	Specialty	City	Services	Est. Medicare paid
1	Millennium Health, LLC	Clinical Laboratory	San Diego	124,765	$20.2M
2	Precision Toxicology, LLC	Clinical Laboratory	San Diego	67,716	$11.3M
3	National Labs Inc	Clinical Laboratory	Hayward	34,666	$4.9M
4	Unilab Corporation	Clinical Laboratory	Sacramento	30,943	$2.8M
5	Lifeline Medical Laboratory Incorporated	Clinical Laboratory	North Hollywood	30,840	$4.2M

That's the top 5. 442 more providers billed drug testing in California in 2024. The full ranked list, with year-over-year history, group affiliations, and phone numbers, is one search in Prospect 811.

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The breakdown

What's behind the number.

Top codes in California

80307Testing for presence of drug, by chemistry analyzers177,821

G0483Drug test(s), definitive, utilizing (1) drug identification methods able to identify individual drugs and distinguish between structural isomers (but not necessarily stereoisomers), including, but not limited to gc/ms (any type, single or tandem) and lc/ms122,563

G0482Drug test(s), definitive, utilizing (1) drug identification methods able to identify individual drugs and distinguish between structural isomers (but not necessarily stereoisomers), including, but not limited to gc/ms (any type, single or tandem) and lc/ms92,381

G0480Drug test(s), definitive, utilizing (1) drug identification methods able to identify individual drugs and distinguish between structural isomers (but not necessarily stereoisomers), including, but not limited to gc/ms (any type, single or tandem) and lc/ms49,601

G0481Drug test(s), definitive, utilizing (1) drug identification methods able to identify individual drugs and distinguish between structural isomers (but not necessarily stereoisomers), including, but not limited to gc/ms (any type, single or tandem) and lc/ms45,084

80305Testing for presence of drug, read by direct observation27,032

Top specialties billing it

Clinical Laboratory81 providers

Nurse Practitioner71 providers

Family Practice59 providers

Pain Management51 providers

Where the billers are

Sacramento18 providers

San Diego17 providers

Santa Barbara12 providers

Bakersfield10 providers

Fresno10 providers

City breakdown

The top drug testing cities in California.

The same 2024 Medicare data, sliced by city: the biggest drug testing cities by number of billers, in est.-Medicare-paid order.

In 2024 the top city for drug testing in California by est. Medicare paid was San Diego: 17 providers billed 207,157 services for an estimated $33.4M, led by Millennium Health, LLC, with 124,765 services (est. $20.2M Medicare paid).

#	City	Billers	Services	Est. Medicare paid	City leader (2024)
1	San Diego	17	207,157	$33.4M	Millennium Health, LLC · 124,765 services · est. $20.2M
2	Sacramento	18	41,274	$3.8M	Unilab Corporation · 30,943 services · est. $2.8M
3	Los Angeles	10	7,470	$1.1M	Jem Dynamics Inc · 6,996 services · est. $1.1M
4	Bakersfield	10	2,464	$276K	Ashok Parmar, M.D. · 1,489 services · est. $189K
5	Santa Barbara	12	775	$14K	Pacific Diagnostic Laboratories · 198 services · est. $9K

City totals are cut from the same public CMS data as everything above: Medicare fee-for-service only, after CMS's under-11-beneficiary suppression, dollars always est. Medicare paid. Where a city shows fewer than 3 billers, we show the totals and name no one. Naming is capped by design: up to 5 ranked billers above plus at most one leader per city here, and no one else on this page.

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 drug screen or definitive panel as billed to Medicare. 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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