Thyroid, FNA Cytomorphology Evaluation

Test Code

CPT Codes
88173<br>** This test is not available for California patient testing **

If indicated, one or more of the following tests could be added at an additional charge:

Level IV, Surgical Pathology (CPT Code(s): 88305)
Histopathology Special Stains-Miscellaneous (CPT Code(s): 88313)

Immunostain(s) (CPT Code(s): 88342 for each), most common are:
Calcitonin, IHC with Interpretation
CD20, IHC with Interpretation
CD3, IHC with Interpretation
PTH, IHC with Interpretation
Thyroid Transcription Factor-1, IHC with Interpretation
Thyroglobulin, IHC with Interpretation

Preferred Specimen
Needle washings in alcohol-based preservative (e.g. CytoLyt®), collected in a plastic leak-proof container and
4 unstained, fixed or air-dried slides of needle washings, submitted in a slide container

Express a small portion of the FNA from needle directly onto glass slide and air dry or fix immediately by immersing in alcohol or by fixing with a commercially prepared cytology spray fixative. Label each slide with patient's name, pathology sample ID, and the number of needle pass (i.e., 1 for 1st, 2 for 2nd, etc). The needle should then be washed in a screw-cap vial of alcohol-based fixative (e.g. CytoLyt®) and labeled with patient's name, pathology sample ID and FNA location. FNAs from different locations (e.g., distinct nodules) should be collected individually on different slides and needle washings (e.g., A-left lobe, B-right lobe).

Transport Temperature
Room temperature

Specimen Stability
Room temperature: 30 days
Refrigerated: 30 days
Frozen: Unacceptable

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Broken slides beyond repair • Unlabeled container or slide • Leakage of fluid during transport • Mismatch between name of patient on slide and name on requisition • Received frozen

Cytomorphology Review

Setup Schedule
Set up: Mon-Sat; Report availble: 2-4 days

Reference Range
See Laboratory Report

Clinical Significance
Thyroid masses are evaluated by fine needle aspiration (FNA). This assay will provide cytologic evaluation and diagnosis of thyroid FNAs by a cytopathologist.

Performing Laboratory
Quest Diagnostics Nichols Institute
14225 Newbrook Drive
Chantilly, VA 20153

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.