Quest Diagnostics LLC
NPI 1952347791 · Clinical Medical Laboratory · Marlborough, MA
Enrolled with Medicare as Part B Supplier - Independent Clinical Laboratory · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Quest Diagnostics LLC is a Clinical Medical Laboratory organization in Marlborough, MA (NPI 1952347791).
Provider details
- NPI number
- 1952347791
- Entity type
- Organization
- Primary specialty
- Clinical Medical LaboratoryLaboratories
- Parent organization
- Quest Diagnostics Incorporated
- Organization subpart
- Yes
- Authorized official
- Charles Bowles, Sr. Vice President(610) 454-4122
- License
- 22D0076229 (MA)
Specialties & taxonomies
Laboratories
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 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
2,141,782 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 | 274,170 | $9 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 180,344 | $10 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 149,732 | $8 |
| Blood Test, Lipids (cholesterol and Triglycerides)80061 | 134,223 | $13 |
| Blood Test, Thyroid Stimulating Hormone (tsh)84443 | 106,206 | $16 |
| Hemoglobin A1c Level83036 | 76,961 | $10 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-21
- Last updated
- 2024-02-12
- Certified
- 2024-02-12
Frequently asked questions
- What is Quest Diagnostics LLC's NPI number?
- Quest Diagnostics LLC's National Provider Identifier (NPI) is 1952347791, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Quest Diagnostics LLC?
- Quest Diagnostics LLC is classified in the NPPES registry as Clinical Medical Laboratory (Laboratories).
- Where is Quest Diagnostics LLC located?
- Quest Diagnostics LLC's practice location on file with NPPES is 200 Forest St, Marlborough, MA 01752-3023.
- What is Quest Diagnostics LLC's phone number?
- The practice phone number listed in the NPPES registry for Quest Diagnostics LLC is (774) 369-3900.
- Does Quest Diagnostics LLC accept Medicare?
- Quest Diagnostics LLC 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 Quest Diagnostics LLC?
- The authorized official listed on Quest Diagnostics LLC's NPPES record is Charles Bowles, Sr. Vice President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Quest Diagnostics LLC's NPI active?
- Yes — Quest Diagnostics LLC's NPI (1952347791) is active in the NPPES registry as of the last update on 2024-02-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.