CLIA lab
CLIA 22D0910050: Mass General Waltham Internal Medicine
Waltham, MA. Certificate and address details from the CMS Provider of Services file for clinical laboratories.
CLIA number 22D0910050 belongs to Mass General Waltham Internal Medicine in Waltham, MA.
Certificate of Waiver, effective August 6, 2025, expires August 5, 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 Waiver
- Certificate effective
- August 6, 2025
- Certificate expiration
- August 5, 2027
- Status in the CMS file
- Active (termination code 00)
- Original participation date
- December 26, 1995
- Facility type
- Physician office
- Ownership (control type)
- Private
- Lab classification
- CLIA laboratory
Source: CMS Provider of Services File, Clinical Laboratories (CLIA), as of October 16, 2026. Publisher page
Lab and contact
- CLIA number
- 22D0910050
- Lab name
- Mass General Waltham Internal Medicine
- Address
- 52 Second Ave, Suite 400, Waltham, MA 02451
- Phone
- (781) 487-4350
- Fax
- (781) 487-4341
Annual test volume the lab reported
- Waived tests
- 10,000
Volumes are what the lab reported to CMS on its CMS-116 application, as carried in the file.
Other labs in Waltham, MA
- Accompany Medical Group of Massachusetts PCCertificate of Waiver, Physician office22D2332646
- Adult & Pediatric Dermatology, PCCertificate for Provider-Performed Microscopy Procedures, Physician office22D2148460
- Afc Urgent Care North WalthamCertificate of Waiver, Other22D2317895
- Bentley University Health CenterCertificate for Provider-Performed Microscopy Procedures, School or student health service22D0874600
- Beth Israel Deaconess Healthcare - WalthamCertificate of Waiver, Physician office22D2098393
- Beth Israel Lahey Health Primary Care WalthamCertificate of Waiver, Physician office22D2204995
- Boston Advanced Medicine IncCertificate of Compliance, Physician office22D1068503
- Boston Children's Hospital at WalthamCertificate of Accreditation, Hospital22D2056434
- Boston Eye Surgery and Laser Center - WestCertificate of Waiver, Ambulatory surgery center22D1057772
- Boston IvfCertificate of Waiver, Ambulatory surgery center22D0913383
Related
Questions
What is the CLIA number for Mass General Waltham Internal Medicine in Waltham?
22D0910050, per the CMS Provider of Services file posted October 16, 2026.
What CLIA certificate does Mass General Waltham Internal Medicine hold?
A Certificate of Waiver, according to the CMS file.
When does CLIA 22D0910050 expire?
The CMS file lists August 5, 2027 as the certificate expiration date; the certificate took effect August 6, 2025.