EXAGEN INC.
NPI 1245494517
Clinical Medical Laboratory in Vista, CA

Q: What is Exagen Inc.'s NPI number?

The NPI number for Exagen Inc. is 1245494517. It was assigned to this organization in the NPPES registry on July 15, 2008. The provider was formerly known as Exagen Diagnostics.

Q: What is Exagen Inc.'s specialty?

The primary specialty registered for this NPI is Clinical Medical Laboratory with taxonomy code 291U00000X.

Q: When was this NPI record last updated?

The NPPES record for Exagen Inc. was last updated on February 8, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since July 15, 2008CLIA 05D1075048 · Accreditation

1261 LIBERTY WAY STE C, VISTA, CA 92081(888) 452-1522(760) 479-6486 Get Directions Write a Review

NPPES record last updated: February 8, 2024. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Feb 8, 2024, Aug 23, 2022, Jul 26, 2021 and 2 more (5 updates tracked since 2018).

On this page

About Exagen Inc. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

EXAGEN INC. (NPI 1245494517), doing business as Exagen Diagnostics, is a healthcare organization registered as a clinical medical laboratory in Vista, California and active in the NPI registry since July 2008. The organization holds an CLIA Accreditation certificate valid through December 30, 2026 and lists Nikki Killings, Director Of Operations, as its authorized official.

NPPES Registry Identity

NPI1245494517

Entity TypeOrganization

Primary Taxonomy291U00000X

Legal Business NameEXAGEN INC.

Location Address1261 LIBERTY WAY STE CVista, CA 92081-8356

Mailing AddressPo Box 27561Albuquerque, NM 87125-7561 · (888) 452-1522 · Fax (760) 479-6486

Phone(888) 452-1522

Fax(760) 479-6486

Organization SubpartNo

Authorized OfficialNikki KillingsDirector Of Operations · (760) 539-3031

Enumeration DateJuly 15, 2008

Last NPPES UpdateFebruary 8, 20245 updates tracked since enumeration

NPPES CertifiedFebruary 8, 2024

✔ NPI 1245494517 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyClinical Medical LaboratoryLaboratories

Taxonomy Code291U00000X

License✔ Licensed in CA · CLF 00334804

Definition

(1) A clinical laboratory is a facility for the biological, microbiological, serological, chemical, immunohematological, hematological, biophysical, cytological, pathological, or other examination of materials derived from the human body for the purpose of providing information for the diagnosis, prevention, or treatment of any disease or impairment of, human beings. These examinations also include procedures to determine, measure, or otherwise describe the presence or absence of various substances or organisms in the body. Facilities only collecting or preparing specimens (or both) or only serving as a mailing service and not performing testing are not considered clinical laboratories. (2) Any facility that examines materials from the human body for purposes of providing information for the diagnosis, prevention, or treatment of any disease or impairment of, or the assessment of, the health of human beings. Typical divisions of a clinical laboratory include hematology, cytology, bacteriology, histology, biochemistry, medical toxicology, and serology.

1261 LIBERTY WAY STE C, Vista, CA 92081

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Other Names 1

Former Legal Business NameExagen Diagnostics

Other Identifiers 7

Other8369NY · New York State Department Of Health

OtherZZZ555113YBlue Shield Of California

Other1484MD · Maryland Dept Of Health

OtherLCO00685RI · Rhode Island Dept Of Health

Other31066PA · Pennsylvania Dept Of Health

Other05D1075048Clia

OtherCDF-00334804CA · Clinical And Public Health Laboratory License

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Absolute Total Care, Ambetter from Arizona Complete Health, Ambetter from Arkansas Health & Wellness and more.Insurance ›

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Accreditation 05D1075048

Exagen Inc · Vista, CA

Active · expires Dec 30, 2026

CLIA Number05D1075048

Laboratory TypeIndependent

Certificate Effective DateDecember 31, 2024

Certificate Expiration DateDecember 30, 2026

Laboratory DirectorDr. Prashanti Reddy

Laboratory Phone(760) 560-1501

Laboratory LocationExagen Inc1261 Liberty Way, Vista, CA 92081

CLIA data matches this NPI record on: Address Name

This is a certificate that is issued to a laboratory on the basis of the laboratory's accreditation by an accreditation organization approved by CMS.

Areas of Expertise CMS Part B claims 23

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Measurement of antibody for assessment of autoimmune disorder, any method 86235

This procedure measures the level of specific antibodies in your body to assess if you have an autoimmune disorder. Antibodies are proteins your immune system produces. In autoimmune disorders, these antibodies mistakenly attack your own cells. This test helps identify such conditions.

52,005 services12,247 patients

Cardiolipin antibody (tissue antibody) measurement 86147

Cardiolipin antibody measurement is a blood test that checks for certain antibodies in your body. These antibodies might be present if you have an autoimmune disease, a condition where your body's immune system mistakenly attacks healthy cells. This test helps in diagnosing and managing such conditions.

28,441 services12,272 patients

Beta 2 glycoprotein 1 antibody (autoantibody) measurement 86146

The Beta 2 Glycoprotein 1 Antibody measurement is a blood test that helps detect certain autoantibodies. These autoantibodies can cause blood clots or pregnancy complications. The test aids in diagnosing conditions like antiphospholipid syndrome.

28,384 services12,255 patients

Rheumatoid factor level 86431

The Rheumatoid Factor Level test is a blood test that helps detect the presence of Rheumatoid Factor (RF), a protein produced by your immune system. High RF levels often indicate autoimmune diseases like rheumatoid arthritis. The test involves a simple blood draw and lab analysis.

24,526 services12,176 patients

Analysis of substance using immunoassay technique, multiple step method 83516

This procedure involves the use of an immunoassay, a highly sensitive technique, to detect and measure substances in your body. It involves multiple steps and is commonly used in diagnosing and monitoring various health conditions.

20,671 services12,372 patients

Thyroglobulin (thyroid protein) antibody measurement 86800

Thyroglobulin antibody measurement is a blood test that checks for antibodies against thyroglobulin, a protein in your thyroid gland. It helps detect conditions like Hashimoto's thyroiditis or monitor thyroid cancer treatment. It's a simple, safe procedure.

12,419 services12,182 patients

Microsomal antibodies (autoantibody) measurement 86376

Microsomal antibodies measurement is a blood test to detect specific antibodies that your immune system may produce. It's often used to diagnose autoimmune conditions like thyroid disorders. The test is simple, involving a standard blood draw.

12,393 services12,150 patients

Analysis of 8 igg autoantibodies and 2 cell-bound complement activation products associated with autoimmune disease, using enzyme-linked immunosorbent immunoassay (elisa), flow cytometry and indirect immunofluorescence in serum specimen or plasma and whole 0312U

The "Aids sle alys 8 igg autoant" test is a diagnostic procedure to detect autoimmune diseases such as Systemic Lupus Erythematosus (SLE). It involves analyzing your blood for 8 types of autoantibodies (proteins your body may mistakenly produce against its own cells). The results aid in diagnosis and treatment planning.

11,137 services11,132 patients

Phospholipid antibody (autoimmune antibody) measurement 86148

Phospholipid antibody measurement is a blood test to detect abnormal antibodies that may cause blood to clot. It's often used to diagnose autoimmune disorders such as lupus or antiphospholipid syndrome. The test involves drawing a small amount of blood for lab analysis.

6,852 services3,343 patients

Analysis using chemiluminescent technique (light and chemical )reaction 82397

Chemiluminescent analysis is a lab test that uses a special reaction between certain chemicals to produce light. This light is then measured to help understand specific elements in a sample. It is a non-invasive and highly accurate testing method.

6,710 services2,380 patients

Measurement of complement (immune system proteins), antigen, 86160

The measurement of complement (immune system proteins) and antigen is a blood test. It helps to assess how your immune system is functioning. Complement proteins play a role in your body's immune response, and antigens trigger this response. This test helps in diagnosing and monitoring certain diseases.

6,156 services2,984 patients

Screening test for antineutrophil cytoplasmic antibody 86036

A screening test for antineutrophil cytoplasmic antibody (ANCA) is a blood test that helps detect certain autoimmune disorders. These disorders cause your immune system to attack your own body tissues. The test identifies antibodies that may indicate these conditions.

4,290 services2,381 patients

Measurement of substance using immunoassay technique 83520

An immunoassay technique is a laboratory method used to detect and measure specific substances in the body. This is done by using antibodies that can recognize and bind to these substances. The results can help in diagnosing and monitoring various health conditions.

3,992 services3,826 patients

Measurement of dna antibody, native or double stranded 86225

The measurement of DNA antibody, native or double stranded, is a blood test that helps detect autoimmune disorders, such as lupus. It identifies if your body is producing antibodies against its own DNA, which can indicate an overactive immune response.

2,761 services2,631 patients

Measurement of hydroxychloroquine 80220

Measurement of hydroxychloroquine is a test that checks the level of a medication called hydroxychloroquine in your body. This is to ensure that the amount is safe and effective for treating conditions like arthritis or lupus. It involves a simple blood test.

1,100 services973 patients

Measurement of methotrexate 80204

Measurement of methotrexate is a blood test that determines the amount of methotrexate, a medication often used in treatment for certain types of cancer or autoimmune diseases, in your body. This helps to ensure the dosage is effective and safe.

627 services538 patients

Antineutrophil cytoplasmic antibody titer 86037

The Antineutrophil Cytoplasmic Antibody (ANCA) titer is a blood test that helps diagnose autoimmune diseases. It measures the level of ANCA antibodies in your blood, which can indicate conditions like vasculitis, where your immune system mistakenly attacks your own blood vessels.

583 services579 patients

Myeloperoxidase (white blood cell enzyme) measurement 83876

Myeloperoxidase (MPO) measurement is a test that evaluates the level of MPO enzyme in your blood. This enzyme is produced by white blood cells and helps fight infections. High levels can indicate inflammation or certain diseases.

521 services520 patients

Flow cytometry technique for dna or cell analysis, first marker 88184

Flow cytometry is a technique used to examine microscopic particles, like cells or DNA. It employs a beam of light to detect and measure physical and chemical characteristics of these particles. The 'first marker' refers to a specific characteristic or feature used to identify a particular cell or particle.

387 services342 patients

Measurement of antibody for assessment of autoimmune disorder, titer 86039

This test measures the level of specific antibodies in your blood, which can help in the diagnosis of autoimmune disorders. A titer refers to the concentration of antibodies. High titers can indicate an active autoimmune disease.

295 services294 patients

Screening test for autoimmune disorder 86038

A screening test for autoimmune disorders is a medical check-up that helps identify if your body's immune system is attacking its own cells. It involves a simple blood draw and analyzes various markers to detect potential issues. This test aids in early detection and effective treatment.

290 services289 patients

Measurement of antibody for rheumatoid arthritis assessment 86200

This procedure measures the level of certain antibodies in your blood. These antibodies can be higher in people with rheumatoid arthritis, a condition causing joint inflammation. The test helps in diagnosing or monitoring the disease.

289 services288 patients

Flow cytometry technique for dna or cell analysis, each additional marker 88185

Flow cytometry is a technique that helps analyze the physical and chemical characteristics of cells or particles. When an additional marker is used, it aids in identifying specific cell types or stages of disease. This helps in precise diagnosis and treatment planning.

40 services40 patients

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Exagen Inc.'s NPI number?

The NPI number for Exagen Inc. is 1245494517. It was assigned to this organization in the NPPES registry on July 15, 2008. The provider was formerly known as Exagen Diagnostics.

Where is Exagen Inc. located?

Exagen Inc. is located at 1261 Liberty Way Ste C, Vista, CA 92081. The listed phone number is (888) 452-1522.

What is Exagen Inc.'s specialty?

The primary specialty registered for this NPI is Clinical Medical Laboratory with taxonomy code 291U00000X.

Does Exagen Inc. hold a CLIA laboratory certificate?

Yes. A Certificate of Accreditation (number 05D1075048) is associated with this NPI, valid through December 30, 2026. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

What insurance does Exagen Inc. accept?

Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from Absolute Total Care, Ambetter from Arizona Complete Health and Ambetter from Arkansas Health & Wellness and 13 other insurers list Exagen Inc. as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Exagen Inc. was last updated on February 8, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.