Exagen Inc.
NPI 1245494517 · Clinical Medical Laboratory · Vista, CA
Enrolled with Medicare as Part B Supplier - Independent Clinical Laboratory · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Exagen Inc. is a Clinical Medical Laboratory organization in Vista, CA (NPI 1245494517).
Provider details
- NPI number
- 1245494517
- Entity type
- Organization
- Primary specialty
- Clinical Medical LaboratoryLaboratories
- Organization subpart
- No
- Authorized official
- Nikki Killings, Director of Operations(760) 539-3031
- License
- CLF 00334804 (CA)
Specialties & taxonomies
Laboratories
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
17 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
224,869 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Measurement of Antibody for Assessment of Autoimmune Disorder, Any Method86235 | 52,005 | $18 |
| Cardiolipin Antibody (tissue Antibody) Measurement86147 | 28,441 | $25 |
| Beta 2 Glycoprotein 1 Antibody (autoantibody) Measurement86146 | 28,384 | $25 |
| Rheumatoid Factor Level86431 | 24,526 | $6 |
| Analysis of Substance Using Immunoassay Technique, Multiple Step Method83516 | 20,671 | $11 |
| Thyroglobulin (thyroid Protein) Antibody Measurement86800 | 12,419 | $16 |
Practice location
Mailing address
Other names (DBA / former)
- Former legal business name
- Exagen Diagnostics
Registry dates
- Enumerated
- 2008-07-15
- Last updated
- 2024-02-08
- Certified
- 2024-02-08
Frequently asked questions
- What is Exagen Inc.'s NPI number?
- Exagen Inc.'s National Provider Identifier (NPI) is 1245494517, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Exagen Inc.?
- Exagen Inc. is classified in the NPPES registry as Clinical Medical Laboratory (Laboratories).
- Where is Exagen Inc. located?
- Exagen Inc.'s practice location on file with NPPES is 1261 Liberty Way Ste C, Vista, CA 92081-8356.
- What is Exagen Inc.'s phone number?
- The practice phone number listed in the NPPES registry for Exagen Inc. is (888) 452-1522.
- Does Exagen Inc. accept Medicare?
- Exagen Inc. is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Exagen Inc.?
- The authorized official listed on Exagen Inc.'s NPPES record is Nikki Killings, Director of Operations. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Exagen Inc.'s NPI active?
- Yes — Exagen Inc.'s NPI (1245494517) is active in the NPPES registry as of the last update on 2024-02-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.