B029ZZZ
Computerized Tomography (CT Scan) Sella Turcica/Pituitary Gland to None with None, None Approach
Procedural Specifications
| Clinical Axis | Detail Definition |
|---|---|
| Section | B Imaging |
| Body System | 0 Central Nervous System |
| Operation | 2 Computerized Tomography (CT Scan) |
| Body Part | 9 Sella Turcica/Pituitary Gland |
| Approach | Z None |
| Device | Z None |
| Qualifier | Z None |
Operation Definition
Computer reformatted digital display of multiplanar images developed from the capture of multiple exposures of external ionizing radiation
Procedure Overview
Computerized tomography of the central nervous system, commonly called a CT scan of the head, takes many individual X-ray exposures from different angles around the head and uses a computer to reassemble them into detailed cross-sectional or multiplanar images. This gives physicians a far clearer view of brain tissue, blood, and bone than a single flat X-ray can provide.
Head and spine CT scans are frequently ordered after trauma to check for bleeding, skull fracture, or swelling, and are also used to evaluate sudden neurological symptoms such as those suggesting a stroke, since the scan can be completed quickly and is widely available even outside regular clinic hours. It is also used to plan certain treatments or to monitor known abnormalities such as tumors or fluid buildup in the brain over time.
Anatomy & Axis Detail
Sella Turcica/Pituitary Gland
Computerized tomography of the sella turcica and pituitary gland examines the bony saddle-shaped depression at the skull base that houses the pituitary gland, a structure central to endocrine regulation. This imaging is often pursued when hormonal abnormalities suggest a pituitary adenoma or when bony changes to the sella, such as erosion or enlargement, raise concern for a mass lesion. CT is particularly well suited to depicting the bony architecture of the sella, including subtle erosive changes or calcifications that might be less apparent on MRI, and can be useful preoperatively for surgeons planning a transsphenoidal approach. Because the pituitary gland itself is a small soft tissue structure, contrast-enhanced technique is often employed to improve differentiation between normal gland tissue and an adjacent lesion, though MRI is frequently favored for detailed soft tissue characterization of this region.
Coding & Documentation
Assigning a code from this family requires the radiology report to confirm a cross-sectional or reconstructed multiplanar study of the specified central nervous system structure, along with whether contrast material was used, since unenhanced, contrast-enhanced, and combined studies each carry distinct codes. A recurring error is selecting the unenhanced code when the report actually describes a study performed both before and after contrast administration, which has its own separate value. Coders should also confirm the exact body part scanned, since head and spinal cord studies are captured under different codes within this family.
Commonly Confused With
This family is commonly confused with magnetic resonance imaging of the same body system, but CT relies on ionizing radiation and computer-reconstructed X-ray exposures, while MRI uses magnetic fields and radio waves with no ionizing radiation at all. It is also distinguished from fluoroscopy, since CT produces reconstructed cross-sectional images after the fact rather than displaying a live, continuously moving image during the study itself.