OrganizationActive
Granite State Lab LLC
NPI 1548686850 · Clinical Medical Laboratory · Rochester, NH
Granite State Lab LLC is a Clinical Medical Laboratory organization in Rochester, NH (NPI 1548686850).
Provider details
- NPI number
- 1548686850
- Entity type
- Organization
- Primary specialty
- Clinical Medical LaboratoryLaboratories
- Organization subpart
- No
- Authorized official
- John Marzinzik, Senior Vp, Cfo(603) 335-8103
Specialties & taxonomies
Laboratories
Profile Score
Detailed profile(76/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
12 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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.
Practice location
120 Washington Street
Rochester, NH 03867
Phone: (603) 330-7057
Street-level locationGet directions
Mailing address
120 Washington Street
Rochester, NH 03867
Registry dates
- Enumerated
- 2014-03-11
- Last updated
- 2014-03-11
Frequently asked questions
- What is Granite State Lab LLC's NPI number?
- Granite State Lab LLC's National Provider Identifier (NPI) is 1548686850, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Granite State Lab LLC?
- Granite State Lab LLC is classified in the NPPES registry as Clinical Medical Laboratory (Laboratories).
- Where is Granite State Lab LLC located?
- Granite State Lab LLC's practice location on file with NPPES is 120 Washington Street, Rochester, NH 03867.
- What is Granite State Lab LLC's phone number?
- The practice phone number listed in the NPPES registry for Granite State Lab LLC is (603) 330-7057.
- Who is the authorized official for Granite State Lab LLC?
- The authorized official listed on Granite State Lab LLC's NPPES record is John Marzinzik, Senior Vp, Cfo. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Granite State Lab LLC's NPI active?
- Yes — Granite State Lab LLC's NPI (1548686850) is active in the NPPES registry as of the last update on 2014-03-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.