Summary & Overview
CPT 0848T: Digital Pathology Slide Digitization
CPT code 0848T is an add‑on code for clinical staff work to scan and digitize whole‑slide images from glass microscope slides to support pathologic diagnosis, reported alongside an initial single‑probe in situ hybridization procedure (88365). As digital pathology expands, this code captures the labor and technical steps required to create high‑resolution digital images used for immediate interpretation or archival review, affecting reimbursement workflows and coding clarity for pathology services nationwide. Key payers included in the analysis are Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare.
Readers will learn what 0848T represents clinically and operationally, how it is used with 88365, and the national implications for pathology service coding and billing. The publication provides benchmarks and coding guidance context where available, explains common clinical use cases for slide digitization in pathology workflows, and highlights payer coverage considerations and coding practice updates. Data not available in the input are noted where applicable.
Billing Code Overview
CPT code 0848T describes clinical staff work to scan and digitize whole–slide images from glass microscope slides for immediate or later pathologic diagnosis. This add‑on code is reported as one unit when slides are digitized in support of an initial single‑probe in situ hybridization stain procedure represented by code 88365.
Service type: Digital pathology scanning and image digitization performed by clinical staff
Typical site of service: Hospital pathology laboratory or independent diagnostic laboratory
Clinical & Coding Specifications
Clinical Context
A patient undergoing in situ hybridization testing for suspected genomic alteration in a tissue biopsy presents to an outpatient pathology laboratory after surgical or core biopsy of a lesion. The laboratory receives glass slides stained with a single-probe ISH procedure (88365) performed by a histology/clinical laboratory team. Clinical staff perform whole–slide image scanning and digitization to produce high-resolution digital images for pathologist review, archiving, and consultation. Typical workflow: accessioning of the case, slide verification and quality check, loading slides into an automated slide scanner, scanning and digitizing whole–slide images, performing basic image QC (focus, labeling, completeness), associating digital images with the patient pathology record, and routing the images to the pathologist for interpretation. Typical site of service is an independent or hospital-based pathology laboratory or anatomic pathology department that supports same–day or deferred pathologic diagnosis and telepathology. Common clinical scenarios include evaluation of suspected malignancy for gene amplification or chromosomal abnormalities assessed by single-probe ISH, intra-laboratory digital archiving, or remote consultation when the pathologist is off-site.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services | Use when the digitization required substantially greater resources or complexity than typical (e.g., extensive manual re-scans, complex labeling, or unusually time-consuming slide preparation) that materially increase clinical staff work beyond standard scanning. |