Quest Diagnostics Nichols Institute

Quest Diagnostics Nichols Institute was paid $39.93M by Medicaid between Jan 2018 and Dec 2024, across 406 billing codes. Its largest line is 81420, Fetal chromosomal aneuploidy genomic sequence analysis panel — 24% of everything it billed.

33Billing provider infoQUEST DIAGNOSTICS NICHOLS INSTITUTE
SAN JUAN CAPISTRANO, CA 92675

33aNPI1780620526assigned 06/21/2006

33bProvider typeClinical Medical Laboratory

28Total paid$39.93M

24GClaims1,192,950

24DCodes billed406

24AFirst – last monthJan 2018 – Dec 2024

Compared with peers

Next to other Clinical Medical Laboratory providers in California

Rank by total paid#26 of 561

Median peer was paid$222K

This provider vs. median180×

Peers share this provider's primary NPPES type and state. Size alone says nothing about billing quality: a big agency or a hospital system is expected to sit far above the median.

Auditor's notes

Automated statistical signals. Not evidence of fraud — how these are computed.

Entity ProliferationAuthorized official TIMMERMAN, LEAH controls 20+ related entities in our dataset. Read more

Box 24A · Dates of service

Paid by month

Paid that monthNov–Dec 2024: claims still arriving when the file was cut, so these months run low for every provider

By year, as a table

Year	Claims	Paid
2018	140,145	$2.03M
2019	116,056	$1.95M
2020	123,138	$2.91M
2021	134,143	$3.70M
2022	236,970	$10.34M
2023	224,013	$8.95M
2024incomplete	218,485	$10.05M

Box 24 · Service lines

What it billed for

Code	Service	Share	Claims	Bene. records	Paid
81420	Fetal chromosomal aneuploidy genomic sequence analysis panel	24%	34,229	31,676	$9.44M
81220	CFTR (cystic fibrosis transmembrane conductance regulator) gene analysis; common variants	16%	39,795	38,124	$6.45M
81443		5.5%	3,358	3,265	$2.19M
81329		4.5%	25,921	25,015	$1.82M
87799		2.4%	17,067	12,304	$975K
87801	Infectious agent detection by nucleic acid; amplified probe, multiple organisms	2.4%	18,510	17,197	$971K
87491	Infectious agent detection by nucleic acid; Chlamydia trachomatis, amplified probe	2.1%	24,013	21,937	$835K
87591	Infectious agent detection by nucleic acid; Neisseria gonorrhoeae, amplified probe	2.1%	23,920	21,875	$829K
87902		2.0%	4,251	3,948	$780K
83520		1.3%	48,152	34,324	$501K
87901		1.2%	3,305	3,074	$495K
86235		1.2%	9,395	7,610	$471K

394 more codes

87536		1.2%	7,878	$462K
87661	Infectious agent detection by nucleic acid; Trichomonas vaginalis, amplified probe	<1%	14,728	$382K
87512		<1%	10,674	$363K
U0003	Infectious agent detection by nucleic acid (dna or rna); severe acute respiratory syndrome coronavirus 2 (sars-cov-2) (coronavirus disease [covid-19]), amplified probe technique, making use of high throughput technologies as described by cms-2020-01-r	<1%	4,832	$327K
83993		<1%	24,124	$313K
88185		<1%	3,491	$289K
86635		<1%	9,749	$287K
87900		<1%	3,319	$277K
82670		<1%	14,463	$271K
81596		<1%	16,205	$270K
82672		<1%	16,984	$269K
87522	Neg quan hep c or qual rna	<1%	7,653	$248K
84305		<1%	16,221	$229K
86147		<1%	11,135	$228K
82677		<1%	13,573	$213K
86146		<1%	7,728	$206K
82105		<1%	15,149	$200K
86336		<1%	13,711	$196K
84702		<1%	19,798	$185K
84445		<1%	4,851	$180K
87906		<1%	1,976	$166K
82542		<1%	12,793	$163K
83516		<1%	20,998	$160K
84403		<1%	6,680	$157K
81243		<1%	15,215	$155K
82172		<1%	14,034	$155K
86696		<1%	9,667	$154K
83704		<1%	7,237	$145K
83498		<1%	7,756	$141K
86003		<1%	8,747	$132K
83698		<1%	6,220	$129K
86255		<1%	25,809	$124K
81513		<1%	2,460	$124K
84681		<1%	10,392	$123K
81229		<1%	411	$123K
86341		<1%	11,374	$120K
87529		<1%	4,082	$119K
82671		<1%	4,447	$119K
82530		<1%	8,885	$116K
82626		<1%	6,824	$114K
81512		<1%	3,505	$113K
88262		<1%	1,192	$112K
82157		<1%	5,797	$109K
81206		<1%	815	$106K
86360		<1%	2,889	$101K
82088		<1%	3,325	$98K
G0480	Drug 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/ms (any type, single or tandem and excluding immunoassays (e.g., ia, eia, elisa, emit, fpia) and enzymatic methods (e.g., alcohol dehydrogenase)), (2) stable isotope or other universally recognized internal standards in all samples (e.g., to control for matrix effects, interferences and variations in signal strength), and (3) method or drug-specific calibration and matrix-matched quality control material (e.g., to control for instrument variations and mass spectral drift); qualitative or quantitative, all sources, includes specimen validity testing, per day; 1-7 drug class(es), including metabolite(s) if performed	<1%	1,862	$96K
86787		<1%	8,699	$94K
86160		<1%	6,610	$93K
83001		<1%	8,176	$93K
83002		<1%	8,697	$92K
82107		<1%	2,306	$91K
87798	Infectious agent detection by nucleic acid; not otherwise specified, amplified probe, each organism	<1%	2,894	$87K
83519		<1%	10,248	$85K
84402		<1%	4,461	$84K
86682		<1%	10,008	$82K
82652		<1%	2,444	$80K
86695		<1%	8,560	$80K
84482		<1%	7,201	$75K
83525		<1%	9,936	$74K
82397		<1%	7,616	$74K
88230		<1%	1,148	$74K
82024		<1%	2,931	$74K
86337		<1%	5,256	$72K
82784		<1%	10,872	$72K
86038		<1%	9,681	$71K
88184		<1%	3,271	$70K
83695		<1%	8,073	$68K
86141		<1%	6,835	$68K
87563		<1%	3,522	$68K
81240		<1%	2,999	$66K
83883		<1%	7,735	$64K
80061	Lipid panel	<1%	10,140	$63K
84244		<1%	3,513	$63K
86361		<1%	2,957	$59K
86376		<1%	6,449	$57K
83921		<1%	5,096	$57K
83013		<1%	947	$56K
87497		<1%	1,573	$55K
84140		<1%	4,365	$53K
36415	Collection of venous blood by venipuncture	<1%	36,002	$53K
86200		<1%	7,383	$52K
87517		<1%	1,635	$52K
81270		<1%	836	$51K
88189		<1%	2,938	$50K
83880		<1%	2,247	$50K
85245		<1%	3,395	$49K
85246		<1%	3,505	$48K
81241		<1%	4,756	$47K
82679		<1%	2,782	$46K
87535		<1%	1,435	$43K
87389	Infectious agent antigen detection by immunoassay technique, HIV-1 antigen with HIV-1 and HIV-2 antibodies	<1%	2,078	$42K
86364		<1%	5,327	$40K
85240		<1%	3,658	$40K
84144		<1%	3,417	$40K
87662		<1%	1,255	$40K
86753		<1%	5,987	$39K
86780		<1%	3,306	$38K
84182		<1%	680	$38K
82681		<1%	2,070	$36K
82306	Vitamin D; 25 hydroxy, includes fraction(s), if performed	<1%	1,890	$36K
82166		<1%	2,117	$36K
83655		<1%	3,869	$36K
85306		<1%	2,501	$35K
80307	Drug test(s), presumptive, any number of drug classes; immunoassay	<1%	786	$35K
81279		<1%	244	$34K
83036	Hemoglobin; glycosylated (A1C)	<1%	5,001	$34K
82104		<1%	3,412	$32K
81257		<1%	3,068	$32K
83010		<1%	3,776	$31K
85247		<1%	1,954	$31K
82533		<1%	2,959	$30K
82384		<1%	1,770	$29K
86359		<1%	1,340	$29K
81401		<1%	1,587	$27K
86316		<1%	1,904	$27K
82642		<1%	1,999	$26K
86431		<1%	7,374	$26K
87631		<1%	372	$26K
86317		<1%	2,819	$26K
83090		<1%	3,076	$25K
85303		<1%	2,057	$24K
86039		<1%	3,484	$24K
80354		<1%	989	$24K
86812		<1%	1,130	$24K
80348		<1%	117	$24K
81162		<1%	72	$23K
87624	Infectious agent detection by nucleic acid; human papillomavirus (HPV), high-risk types	<1%	809	$22K
82653		<1%	3,762	$21K
86381		<1%	1,549	$21K
83527		<1%	2,168	$20K
86628		<1%	1,637	$20K
80050	General health panel	<1%	885	$20K
82139		<1%	1,974	$20K
82379		<1%	1,931	$19K
86148		<1%	1,906	$19K
86803		<1%	1,659	$18K
85730		<1%	4,538	$18K
84146		<1%	943	$18K
81256		<1%	1,821	$17K
80299		<1%	1,537	$17K
86794		<1%	1,653	$17K
84443	Thyroid stimulating hormone (TSH)	<1%	1,682	$17K
84432		<1%	1,209	$16K
84165		<1%	2,458	$16K
83835		<1%	1,348	$16K
85300		<1%	1,794	$16K
86021		<1%	1,676	$15K
81219		<1%	164	$15K
86382		<1%	939	$15K
84425		<1%	776	$15K
81511		<1%	1,266	$15K
80053	Comprehensive metabolic panel	<1%	2,230	$14K
85613		<1%	2,166	$14K
86258		<1%	1,008	$14K
84439		<1%	3,068	$14K
87209		<1%	1,075	$14K
81207		<1%	128	$14K
83021		<1%	1,040	$13K
87634		<1%	417	$13K
84143		<1%	909	$13K
84153		<1%	1,438	$12K
80349		<1%	615	$12K
83631		<1%	1,087	$12K
82657		<1%	939	$12K
87481		<1%	432	$12K
82787		<1%	801	$12K
81339		<1%	148	$11K
82103		<1%	1,393	$11K
84080		<1%	996	$11K
84260		<1%	645	$11K
84270		<1%	519	$11K
86618		<1%	695	$11K
82977		<1%	3,832	$10K
86665		<1%	739	$10K
82985		<1%	1,191	$10K
82570		<1%	3,614	$10K
86162		<1%	857	$10K
86015		<1%	1,528	$9K
85025	Blood count; complete (CBC), automated, and automated differential WBC count	<1%	1,792	$9K
86671		<1%	813	$9K
83970		<1%	316	$9K
87340		<1%	1,012	$9K
82785		<1%	799	$8K
86762		<1%	684	$8K
87635	Infectious agent detection by nucleic acid; SARS-CoV-2 (COVID-19), amplified probe	<1%	280	$8K
87625		<1%	260	$8K
80074		<1%	186	$8K
82247		<1%	2,740	$8K
81364		<1%	119	$7K
81291		<1%	2,358	$7K
86225		<1%	714	$7K
87177		<1%	1,086	$7K
84460		<1%	2,737	$7K
86790		<1%	1,035	$7K
83918		<1%	566	$7K
86343		<1%	763	$7K
86769		<1%	170	$6K
82656		<1%	757	$6K
87467		<1%	1,208	$6K
80145		<1%	326	$6K
86596		<1%	429	$6K
86800		<1%	636	$6K
86666		<1%	795	$6K
86334		<1%	446	$6K
81332		<1%	521	$6K
84145		<1%	327	$6K
85301		<1%	627	$5K
87109		<1%	558	$5K
88142		<1%	306	$5K
86592		<1%	1,665	$5K
84484		<1%	713	$5K
84238		<1%	165	$5K
86692		<1%	442	$5K
86757		<1%	464	$5K
82728		<1%	767	$5K
86036		<1%	680	$5K
86480		<1%	95	$4K
86774		<1%	400	$4K
83497		<1%	554	$4K
84206		<1%	284	$4K
83020		<1%	477	$4K
88175	Cytopathology, cervical or vaginal, any reporting system; collected in preservative fluid, automated thin layer	<1%	173	$4K
82010		<1%	802	$4K
84436		<1%	1,662	$4K
82017		<1%	383	$4K
82610		<1%	311	$3K
85027		<1%	689	$3K
83006		<1%	272	$3K
86738		<1%	166	$3K
85385		<1%	687	$3K
86008		<1%	241	$3K
86140		<1%	766	$3K
86664		<1%	446	$3K
87502	Infectious agent detection by nucleic acid, influenza virus, for multiple types or subtypes, includes all targets	<1%	42	$3K
86231		<1%	530	$3K
84075		<1%	743	$3K
82705		<1%	801	$3K
86052		<1%	358	$3K
86041		<1%	359	$3K
84155		<1%	1,237	$3K
86708		<1%	401	$2K
80230		<1%	128	$2K
83550		<1%	552	$2K
U0005	Infectious agent detection by nucleic acid (dna or rna); severe acute respiratory syndrome coronavirus 2 (sars-cov-2) (coronavirus disease [covid-19]), amplified probe technique, cdc or non-cdc, making use of high throughput technologies, completed within 2 calendar days from date of specimen collection (list separately in addition to either hcpcs code u0003 or u0004) as described by cms-2020-01-r2	<1%	594	$2K
84478		<1%	2,397	$2K
87046		<1%	368	$2K
82550		<1%	440	$2K
82465		<1%	2,409	$2K
84120		<1%	243	$2K
80177		<1%	285	$2K
86340		<1%	195	$2K
87230		<1%	173	$2K
ATP03		<1%	300	$2K
83718		<1%	2,547	$2K
87912		<1%	12	$2K
87086	Culture, bacterial; quantitative colony count, urine	<1%	275	$2K
80361		<1%	1,128	$2K
80081		<1%	39	$2K
83540		<1%	567	$2K
86648		<1%	164	$2K
87081		<1%	305	$2K
86735		<1%	100	$2K
82595		<1%	370	$2K
85652		<1%	850	$2K
82607		<1%	483	$2K
86704		<1%	343	$2K
83014		<1%	244	$2K
84630		<1%	205	$2K
82552		<1%	161	$2K
86606		<1%	122	$2K
86042		<1%	188	$2K
84481		<1%	259	$2K
82955		<1%	265	$1K
85041		<1%	611	$1K
86615		<1%	105	$1K
87338		<1%	176	$1K
86355		<1%	53	$1K
83625		<1%	131	$1K
86043		<1%	221	$1K
82365		<1%	144	$1K
87449		<1%	171	$1K
84588		<1%	60	$1K
86215		<1%	147	$1K
84163		<1%	131	$1K
85014		<1%	637	$1K
86765		<1%	70	$1K
83615		<1%	258	$1K
85018		<1%	612	$1K
86362		<1%	116	$1K
80365		<1%	1,080	$1K
86706		<1%	256	$1K
86850		<1%	125	$1K
85598		<1%	63	$957.88
82164		<1%	212	$952.30
84433		<1%	550	$873.02
80321		<1%	273	$850.17
82941		<1%	67	$846.01
87581		<1%	39	$836.95
87088		<1%	114	$826.79
85597		<1%	89	$795.66
82310		<1%	193	$779.31
81479	Unlisted molecular pathology procedure	<1%	1,397	$759.61
82746		<1%	187	$739.51
88360		<1%	12	$737.62
85305		<1%	78	$720.38
86644		<1%	84	$708.09
86023		<1%	82	$701.30
83521		<1%	18	$682.18
81335		<1%	73	$660.44
86684		<1%	57	$659.85
82507		<1%	29	$653.92
86617		<1%	27	$595.81
86593		<1%	188	$592.32
87538		<1%	26	$554.22
84585		<1%	64	$553.91
86609		<1%	126	$537.74
81283		<1%	39	$534.33
83735		<1%	128	$498.47
86901		<1%	138	$489.45
81400		<1%	57	$473.82
86900		<1%	138	$465.51
86663		<1%	69	$433.08
99001		<1%	183	$422.45
82390		<1%	72	$404.88
84207		<1%	26	$402.92
86747		<1%	14	$387.74
85302		<1%	41	$384.11
83945		<1%	35	$382.14
86638		<1%	26	$370.79
81403		<1%	43	$370.40
81226		<1%	54	$363.06
86001		<1%	24	$361.48
86611		<1%	44	$357.81
87186		<1%	70	$352.32
84311		<1%	72	$344.01
85610		<1%	153	$342.05
82085		<1%	46	$339.59
86256		<1%	45	$335.27
81306		<1%	28	$322.66
84550		<1%	66	$308.32
83630		<1%	40	$289.43
85307		<1%	26	$274.17
82634		<1%	16	$268.76
86622		<1%	40	$262.47
81508		<1%	17	$248.64
84466		<1%	25	$247.75
81225		<1%	54	$237.68
82525		<1%	27	$236.94
81227		<1%	52	$226.53
83690		<1%	88	$204.43
87484		<1%	16	$203.51
87468		<1%	16	$203.51
86161		<1%	26	$202.26
81231		<1%	53	$191.43
81230		<1%	53	$191.43
81232		<1%	40	$191.43
81001		<1%	191	$176.62
80175		<1%	15	$160.01
87254		<1%	17	$150.14
82340		<1%	28	$141.59
82668		<1%	28	$141.05
82523		<1%	16	$139.13
84590		<1%	26	$135.94
84105		<1%	28	$124.95
84392		<1%	27	$119.78
87168		<1%	30	$118.23
84300		<1%	27	$114.06
84560		<1%	28	$108.91
84133		<1%	27	$105.07
87300		<1%	17	$101.53
81328		<1%	27	$95.40
81350		<1%	43	$85.25
84154		<1%	13	$84.99
80346		<1%	27	$83.84
82043		<1%	37	$80.04
83986		<1%	27	$78.24
81247		<1%	28	$75.96
82950		<1%	12	$66.12
82150		<1%	15	$60.30
82040		<1%	16	$56.55
87427		<1%	14	$55.86
80048	Basic metabolic panel (calcium, ionized)	<1%	12	$54.28
83721		<1%	60	$52.72
82565		<1%	13	$51.21
83529		<1%	12	$44.34
81355		<1%	27	$38.34
87045		<1%	13	$33.05
84480		<1%	13	$26.39
0346U		<1%	13	$18.65
80324		0%	13	$0.00
0001M		0%	14	$0.00
81381		0%	27	$0.00
80362		0%	19	$0.00

Claims and beneficiary counts add up across code × month rows, so one patient seen every month counts many times. Rows with fewer than 12 claims are suppressed by HHS, so small lines can be missing.

From NPPES

Who's on the registration

Authorized officialTIMMERMAN, LEAH (SVP, HEALTH PLANS)

Parent organizationQUEST DIAGNOSTICS INCORPORATED

Same official

Other billing entities under TIMMERMAN, LEAH

Full network →

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Quest Diagnostics Incorporated	Clifton, NJ	$637.74M
Quest Diagnostics LLC Il	Wood Dale, IL	$429.84M
Quest Diagnostics Clinical Laboratories INC	Irving, TX	$276.76M
Labone LLC	Lenexa, KS	$212.28M
Quest Diagnostics Clinical Laboratories INC	Tucker, GA	$211.13M
Quest Diagnostics Clinical Laboratories INC	Miramar, FL	$197.58M
Labone of Ohio INC	Cincinnati, OH	$167.17M
Unilab Corporation	Sacramento, CA	$141.24M
Quest Diagnostics Incorporated MD	Baltimore, MD	$121.81M
Quest Diagnostics Incorporated	Las Vegas, NV	$59.32M
Quest Diagnostics LLC Il	Schaumburg, IL	$50.71M
Quest Diagnostics Clinical Laboratories INC	Tampa, FL	$49.99M
Quest Diagnostics Nichols Institute, INC.	Chantilly, VA	$46.91M
Quest Diagnostics Clinical Laboratories INC	Norristown, PA	$22.72M
Specialty Laboratories INC	West Hills, CA	$16.76M
Quest Diagnostics Clinical Laboratories INC	Denver, CO	$14.27M
Quest Diagnostics Clinical Laboratories INC	Houston, TX	$8.76M
Med Fusion, LLC	Lewisville, TX	$4.17M
Quest Diagnostics Clinical Laboratories INC	Maryland Heights, MO	$2.98M

Matched on the authorized-official name exactly as entered in NPPES. A common name can match unrelated people.