Summary & Overview
CPT 0843T: Slide Digitization for Intraoperative Pathology Consultation
CPT code 0843T is an add‑on pathology code for clinical staff time spent scanning and digitizing whole‑slide images from glass microscope slides to support immediate or subsequent pathologic diagnosis. It is reported alongside intraoperative consultation reporting and documents the technical staff work required to produce digital images used in real‑time or deferred pathology review. Nationally, digitization of pathology slides supports telepathology, remote consultation, and workflow efficiency in operating room consultations and tissue triage.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the code’s clinical context and service setting, discussion of common billing considerations, and benchmarking information where available. The publication outlines how 0843T integrates with intraoperative pathology workflows—specifically its use as an add‑on to 88333 for touch‑preparation slides—and summarizes payer coverage themes, common modifiers used in practice, and implementation considerations for pathology laboratories and hospitals.
The content provides operational clarity for coding teams and revenue cycle staff on when and how to report CPT code 0843T, what clinical activities it represents, and the typical sites of service where digitization for intraoperative consultation occurs. Data not available in the input is noted where applicable.
Billing Code Overview
CPT code 0843T describes clinical staff work to scan and digitize whole–slide images from glass microscope slides for immediate or later pathologic diagnosis. The code is reported as an add–on service to document digitization performed in support of an intraoperative pathology consultation.
Service type: Pathology digital imaging / slide digitization performed by clinical staff
Typical site of service: Hospital or surgical pathology laboratory during intraoperative consultations (operating room support and associated pathology lab areas)
Clinical & Coding Specifications
Clinical Context
A surgical patient undergoing an invasive procedure (for example, an excisional biopsy of a suspicious skin lesion or partial colectomy for a colonic mass) arrives to the operating room. During the operation the surgeon requests an intraoperative pathology consultation to confirm whether sampled tissue is diagnostic and to guide immediate surgical decision-making. A histology technician prepares touch-preparation (touch prep) slides from the fresh tissue at the initial site. Clinical staff then scan and digitize the glass touch-preparation slides to create whole-slide images that the pathologist views on a workstation for rapid intraoperative diagnosis. The digitized images are used for the intraoperative consultation reported with 88333 and may be archived for later review. Typical sites of service include hospital operating rooms, hospital outpatient surgery centers, and surgical pathology laboratories adjacent to the OR. The typical patient scenario involves urgent need for real-time interpretation to guide the extent of resection, margin assessment, or immediate management decisions.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services | Use when scanning/digitization requires substantially greater work or resources than typical (document clinical justification and time/effort). |
| 52 | Reduced services | Use when the digitization service is partially performed or limited in scope compared with full-service expectations.