Unilab Corporation
NPI 1649315821 · Clinical Medical Laboratory · Stockton, CA
Enrolled with Medicare as Part B Supplier - Independent Clinical Laboratory · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Unilab Corporation is a Clinical Medical Laboratory organization in Stockton, CA (NPI 1649315821).
Provider details
- NPI number
- 1649315821
- Entity type
- Organization
- Primary specialty
- Clinical Medical LaboratoryLaboratories
- Parent organization
- Quest Diagnostics Incorporated
- Organization subpart
- Yes
- Authorized official
- Charles Bowles, Vice President(610) 454-6000
- License
- 05D0700053 (CA)
Specialties & taxonomies
Laboratories
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 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
1,962 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) |
|---|---|---|
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 576 | $9 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 441 | $8 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 388 | $10 |
| Blood Test, Clotting Time85610 | 252 | $4 |
| Blood Test, Basic Group of Blood Chemicals (calcium, Total)80048 | 121 | $8 |
| Manual Urinalysis Test With Examination Using Microscope, Automated81001 | 86 | $3 |
Practice location
Mailing address
Other names (DBA / former)
- Doing business as
- Quest Diagnostics
- Doing business as
- Quest Diagnostics
Registry dates
- Enumerated
- 2007-02-21
- Last updated
- 2018-12-11
Frequently asked questions
- What is Unilab Corporation's NPI number?
- Unilab Corporation's National Provider Identifier (NPI) is 1649315821, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Unilab Corporation?
- Unilab Corporation is classified in the NPPES registry as Clinical Medical Laboratory (Laboratories).
- Where is Unilab Corporation located?
- Unilab Corporation's practice location on file with NPPES is 2291 W March Lane, Stockton, CA 95207-6652.
- What is Unilab Corporation's phone number?
- The practice phone number listed in the NPPES registry for Unilab Corporation is (209) 951-5831.
- Does Unilab Corporation accept Medicare?
- Unilab Corporation 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 Unilab Corporation?
- The authorized official listed on Unilab Corporation's NPPES record is Charles Bowles, Vice President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Unilab Corporation's NPI active?
- Yes — Unilab Corporation's NPI (1649315821) is active in the NPPES registry as of the last update on 2018-12-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.