In a survey conducted by an association working group, 40 percent of respondents said they are already offering TMB, with most others planning to do the same within the year.
An IASLC survey showed that molecular testing is not performed in line with expert guidelines, which means only a minority of lung cancer patients are benefitting from precision oncology.
The diversity of the organizations that have signed the letter to CMS demonstrates widespread concern over this policy.
In a letter to CMS, AMP made a case for crosswalking existing CPT codes for BRCA1/2 testing to codes that more accurately reflect the work required to analyze these genes.
Researchers separately found that the assay had high concordance with other techniques in cancers including colorectal and endometrial carcinomas.
Company officials stressed the firm's drive to help connect industry and academia, and expand access to tools for precision medicine.
The new guidelines said ROS1, KRAS, BRAF, MET, RET, and HER2 should be included in targeted and expanded panels.
The recommendations were developed by a working group of the AMP Clinical Practice Committee that included representatives from ACMG, ASCO, and CAP.
The draft document, which includes recommendations on which molecular tests labs should perform, on what samples, and with what analytical specifications, is available for comment until April 22.