Plus Therapeutics, Inc. (NASDAQ:PSTV) ("Plus" or the "Company"), a healthcare company developing and commercializing precision diagnostics and radiopharmaceuticals for central nervous system (CNS) cancers, today announces that the American Medical Association (AMA) has approved a new, Proprietary Laboratory Analyses (PLA) Current Procedural Terminology (CPT) code for its CNSide® Cerebrospinal Fluid (CSF) Tumor Cell Enumeration (TCE) test.

The dedicated billing code, 0640U, effective July 1, 2026, establishes a unique reimbursement identifier for the CNSide CSF TCE test, supporting payer claims processing and facilitating broader clinical adoptions as the Company continues the U.S. commercial launch of its CNS metastases diagnostic platform.