Summary & Overview
HCPCS G9343: CT Prior Imaging Search Not Conducted for Radiation Planning
HCPCS Level II code G9343 documents that, for medical reasons, a search was not conducted for DICOM-format CT images from non-affiliated external facilities within the prior 12 months when those studies are available via a secure, authorized, media-free shared archive. This code is relevant in radiation oncology workflows where prior CT studies are used for radiation treatment planning or image-guided treatment delivery and where constraints or clinical determinations preclude retrieval searches. Nationally, proper use of G9343 affects documentation, care coordination, and claims adjudication where image availability and archive access are factors.
Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise explanation of the code's clinical context, typical sites of service, and the implications for documentation and billing. The publication provides benchmark-oriented content and policy context where available, summarizes common use cases in radiation therapy planning, and notes where input data was not provided. This resource is intended to help billing staff, clinical program managers, and policy analysts understand when G9343 applies and what information is typically required for claims and recordkeeping.
Billing Code Overview
HCPCS Level II code G9343 describes a situation where, for medical reasons, a search was not conducted for DICOM-format images of prior patient CT imaging studies performed at non-affiliated external healthcare facilities or entities within the past 12 months. The description specifies that the studies would be those available through a secure, authorized, media-free, shared archive, such as CT studies performed for radiation treatment planning or image-guided radiation treatment delivery.
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Service type: Image retrieval search exception for prior CT studies related to radiation treatment planning or image-guided radiation therapy delivery
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Typical site of service: Radiation oncology or imaging services coordinated through a secure, shared archive (external facilities/non-affiliated entities)
Data not available in the input for payers, common modifiers, associated taxonomies, ICD-10 diagnoses, related codes, and service line.
Clinical & Coding Specifications
Clinical Context
A patient is scheduled for external-beam radiation therapy for a thoracic malignancy and presents for radiation treatment planning. The radiation oncology team needs prior CT imaging studies performed at a non‑affiliated facility within the past 12 months to review tumor extent, anatomy, and prior treatment fields. Due to medical reasons (for example, the patient is hemodynamically unstable, has severe pain, or cannot safely travel or provide external media), the clinical team documents that a search for DICOM format images in a secure, authorized, media‑free, shared archive was not conducted. The workflow includes a review of the patient chart, direct communication with the referring facility to request records by alternate means, and proceeding with on‑site CT simulation when external DICOM images are unavailable or inaccessible. Documentation in the radiation oncology record notes the medical rationale for not searching the shared archive and the intent to obtain prior imaging by other secure channels if needed for treatment planning.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
25 | Significant, separately identifiable evaluation and management service by the same physician on the same day of procedure | When an E/M is provided on the day of CT simulation or radiation planning that is distinct from planning services |
59 |