CNSide Diagnostics, LLC is a Houston laboratory that tests cerebrospinal fluid for cancer cells in patients with leptomeningeal metastases. Clinicians send specimens to the laboratory. The current CLIA certificate address is 6420 Levit Green Boulevard, Suite 210, Houston, TX 77021.
Identity
- Legal name: CNSide Diagnostics, LLC
- NPI: 1306684022 (organization identifier; not a laboratory certificate)
- NPPES status: Active. Enumeration date July 17, 2024. Last updated August 28, 2026.
- Authorized official on NPPES: Marc Hedrick, MD, CEO
- Parent described on the company site: established in 2024 as a subsidiary after Plus Therapeutics, now called Cerenome, acquired the CNSide assets
- Category: Clinical laboratory
Services
The company site describes the CNSide cerebrospinal fluid assay platform and says U.S. commercialization starts with the Tumor Cell Enumeration (TCE) test. The Houston facility page lists on-site imaging, molecular analysis, and cell handling, and in-house manufacturing of the CEE-Sure CSF collection-tube preservative, an antibody mix, and a microfluidic chip.
Credentials
Laboratory director named on the company site and on the current certificate: Jonathan Stein, PhD, HCLD (ABB).
- CLIA: Certificate of Accreditation 45D2308861. Effective September 2, 2025. Expires September 1, 2027. Listed specialty: Diagnostic Immunology — General Immunology (code 220), effective October 15, 2025.
- CAP: Certificate of Accreditation 9993138, as printed on cnside-dx.com.
Laboratory address on the CLIA certificate: 6420 Levit Green Boulevard, Suite 210, Houston, TX 77021.
Address on NPPES: 6420 S Levitt Green Blvd, Ste 210, Houston, TX 77021. The street spelling differs from the certificate. Status: contradictory on the spelling “Levit” versus “Levitt.”
Prior certificate address: A Certificate of Registration effective August 6, 2024, listed 2710 Reed Road, Suite 160, Houston, TX 77051, with laboratory director Gregory N. Fuller. That is not the address on the 2025 accreditation certificate.
Check this laboratory yourself
CLIA Certificate of Accreditation 45D2308861 (PDF on the laboratory site)
Before you contact them
- Company phone (cnside-dx.com and NPPES mailing record): the number below
- NPPES location telephone, separate from the company line: (858) 875-5214
- Fax on the company site and on NPPES: (800) 241-1130
Location and contact
- Laboratory address (CLIA certificate): 6420 Levit Green Boulevard, Suite 210, Houston, TX 77021
- Phone: (877) 288-4174
- Website: cnside-dx.com
Last verified: October 11, 2026. Sources: cnside-dx.com about page; CLIA certificate PDF hosted by the laboratory; NPPES API for NPI 1306684022.
This is not medical advice. In an emergency, call 911.
Listing type: Editorial. Not claimed by the laboratory. Not sponsored. Send a correction.