CLIA lab
CLIA 33D0158831: Mather Hospital Northwell Health
Port Jefferson, NY. Certificate and address details from the CMS Provider of Services file for clinical laboratories.
CLIA number 33D0158831 belongs to Mather Hospital Northwell Health in Port Jefferson, NY.
Certificate of Compliance, effective August 28, 1995, expires March 26, 2027.
Active in the CMS Provider of Services file posted October 16, 2026.
Source: CMS Provider of Services File, Clinical Laboratories (CLIA), as of October 16, 2026. Publisher page
Run it in Rivvi
Map your lab's test names to LOINC codes
Open in RivviFree to start. Opens Rivvi, the AI workspace for healthcare teams.
Certificate
- Certificate type
- Certificate of Compliance
- Certificate effective
- August 28, 1995
- Certificate expiration
- March 26, 2027
- Status in the CMS file
- Active (termination code 00)
- Original participation date
- January 7, 1993
- Facility type
- Hospital
- Ownership (control type)
- Other
- Lab classification
- CLIA exempt laboratory
- Directly affiliated labs
- 1
Source: CMS Provider of Services File, Clinical Laboratories (CLIA), as of October 16, 2026. Publisher page
Lab and contact
- CLIA number
- 33D0158831
- Lab name
- Mather Hospital Northwell Health
- Address
- North Country Rd, Port Jefferson, NY 11777
- Phone
- (631) 476-2823
- Fax
- (631) 686-7667
Annual test volume the lab reported
- Waived tests
- 89,500
- Other nonwaived tests
- 1,948,795
- Total
- 2,038,295
Volumes are what the lab reported to CMS on its CMS-116 application, as carried in the file.
Affiliated CLIA numbers
Other labs in Port Jefferson, NY
- Advanced Gastroenterology & Endoscopy, PCCertificate of Compliance, Physician office33D2058269
- Brookhaven Gastroenterology Associates PCCertificate of Waiver, Physician office33D2273244
- CS Medical Associates PCCertificate of Waiver, Physician office33D2341406
- Good Samaritan Unviersity HospitalCertificate of Compliance, Hospital33D0158845
- Good Shepherd Hospice Inpatient CenterCertificate of Waiver, Hospice33D2058292
- Harbor View Medical Services PCCertificate of Waiver, Ancillary test site33D2109161
- Jim Best DO PCCertificate of Waiver, Physician office33D2018029
- Mark Di Benedetto MDCertificate of Waiver, Physician office33D0158777
- Mather Chemical Dependency ClinicCertificate of Waiver, Other33D2211199
- Mather Hospital Northwell Health WoundCertificate of Waiver, Ambulatory surgery center33D1078901
Related
Questions
What is the CLIA number for Mather Hospital Northwell Health in Port Jefferson?
33D0158831, per the CMS Provider of Services file posted October 16, 2026.
What CLIA certificate does Mather Hospital Northwell Health hold?
A Certificate of Compliance, according to the CMS file.
When does CLIA 33D0158831 expire?
The CMS file lists March 26, 2027 as the certificate expiration date; the certificate took effect August 28, 1995.