Anatomic and Clinical Pathology in the ASC Setting
Pathology is a billing-adjacent service in an ASC. The surgeon removes tissue during the case, but the pathologist works afterward, examining specimens and reporting findings. This work is usually handled by an outside laboratory or a hospital reference lab rather than by the ASC itself.
The relevant codes live in the surgical pathology family, CPT 88300 through 88399, covering tissue examination from gross-only review through detailed microscopic study, plus special stains and consultations. Our dataset maps zero ASC-payable procedure codes to this specialty, so Medicare does not pay these in an ASC and they flow through laboratory and professional billing channels. DataLily's procedure library tracks CPT-specific prior-authorization and documentation requirements, helping coordinate the surgical line and downstream pathology so specimens are not lost between the two claims.
This role bills around the surgical case rather than carrying its own ASC-payable procedure codes. See the surgical specialty hubs for the procedures performed in the ASC.
Is pathology performed inside the ASC?
The specimen collection happens during the ASC procedure, but the diagnostic examination is typically done afterward by a pathologist at an outside or reference laboratory. The ASC furnishes the tissue, and the pathology read is reported separately rather than on the ASC facility claim.
What CPT codes does anatomic and clinical pathology use for ASC specimens?
The main family is surgical pathology, CPT 88300 through 88399. These codes describe examination of tissue at increasing levels of complexity, along with related services such as decalcification, special stains, and pathology consultations on the removed specimen.
Why does this specialty map zero ASC-payable codes to pathology?
Because pathology is a tier-2, around-the-case role. Its work is reported through laboratory and professional billing channels, not on the ASC facility claim, so none of the 88300-88399 codes are ASC-payable facility procedures. They still matter for coordinating the surgical and pathology claims.