Posted Date
Effective Date
Test Name
Histoplasma Antibody, CSF
Update Type
Test Code Change
CPT Code
86698 x3
Order Code
CHISM
Referral Laboratory
Mayo Medical Laboratories
Histoplasma Antibody, CSF
Order Code: CHISM
Fee Code: AA538 (CPT 86698 x3)
Reference Laboratory: Mayo CHIST
New Order Code: HICSF
New Reference Lab: Mayo HICSF
Effective June 4, 2024, Mayo Clinic Laboratories will replace the Histoplasma Antibody, CSF, assay (Mayo test ID CHIST) with Histoplasma Antibody, Complement Fixation and Immunodiffusion, CSF (Mayo test ID HICSF). The Histoplasma mycelial antigen by complement fixation component will be removed due to limited clinical utility.