Summary & Overview
CPT 0840T: Slide Digitization for Pathology Consultation
CPT code 0840T defines clinical staff work to scan and digitize glass microscope slides into whole–slide images used for pathologic diagnosis. It is an add-on code reported in conjunction with a comprehensive consultation on referral slides, such as CPT code 88325, and supports digital pathology workflows that enable remote review, archiving, and teleconsultation.
This code matters nationally as pathology departments and diagnostic labs increasingly adopt digital slide imaging to streamline consultations, enable subspecialty review, and support telepathology. Payers commonly considered in coverage and payment discussions include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Data not available in the input for payer-specific rates or coverage policies.
Readers will learn what CPT code 0840T represents, the clinical and operational contexts in which it is used, and which major payers are relevant for policy and billing considerations. The publication outlines typical service setting and workflow implications, clarifies the code’s linkage to comprehensive pathology consultation services, and summarizes available administrative details. It also points to where additional payer-specific coverage and reimbursement information would be required for billing and compliance.
Billing Code Overview
CPT code 0840T 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 when slides prepared elsewhere are digitized to support a comprehensive pathology consultation.
Service Type: Clinical pathology support — digitization of microscopy slides to produce whole–slide images for pathologic review.
Typical Site of Service: Pathology laboratory or hospital laboratory where glass slides are digitized by clinical staff for remote or onsite diagnostic review.
Clinical & Coding Specifications
Clinical Context
A pathology laboratory receives glass slides from an external referring laboratory for a comprehensive consultative pathology review. A dermatopathology specimen (for example, a resected skin lesion) arrives with associated clinical history and prior slides. Clinical staff perform whole-slide imaging by scanning the glass slides to create high-resolution digital images that the consulting pathologist will review remotely or later during the consultative sign-out. The workflow includes accessioning the referral, verifying slide labels, scanning each slide using a validated whole-slide scanner, performing quality control of digital images, and storing the images in the laboratory information system and image archive. One unit of add-on code 0840T is reported to reflect the clinical staff work of digitizing slides associated with one unit of consultation code 88325 for review of referred slides prepared elsewhere. Typical site of service is an independent pathology laboratory, hospital-based pathology department, or an outpatient anatomic pathology reference lab. Common patient scenarios include second-opinion consultations for malignancy confirmation, complex dermatopathology cases, or oncologic staging where referred slides require remote review by a subspecialty pathologist.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services |