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The CPT® Code 84285 refers to a laboratory test specifically designed to measure the levels of silica in the blood or urine. Silica, a mineral commonly found in the environment, is typically present in the body in a bound form, associated with proteins and lipids. It plays a crucial role in the structure of collagen, which is essential for maintaining the elasticity of the skin and the strength of bones. Elevated levels of silica can indicate various health issues, particularly those related to occupational exposure to inhaled silica particles. Such exposure is often linked to conditions like silicosis, lung cancer, pulmonary tuberculosis, chronic airway diseases, autoimmune disorders, and chronic renal failure. The testing process involves obtaining a blood sample through a procedure known as venipuncture, which is separately reportable. For urine testing, a sample is collected from a random void. The analysis of serum or plasma is conducted using quantitative inductively coupled plasma/atomic emission spectrometry, while urine samples are analyzed using quantitative inductively coupled plasma/optical emission spectrometry. It is important to note that the use of gadolinium contrast media within 48 hours prior to urine sample collection may interfere with the test results, potentially leading to inaccurate measurements of silica levels.
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The silica test (CPT® Code 84285) is indicated for the evaluation of silica exposure and its potential health effects. The following conditions and symptoms may warrant this test:
The procedure for testing silica levels involves several key steps, which are outlined below:
After the silica testing procedure, there are a few considerations for both the patient and healthcare provider. The blood and urine samples will be sent to a laboratory for analysis, and results are typically available within a specified timeframe, depending on the laboratory's processing capabilities. Patients may be advised to avoid the use of gadolinium contrast media within 48 hours prior to urine sample collection, as this can alter test results. Once the results are available, healthcare providers will review them in the context of the patient's clinical history and symptoms to determine any necessary follow-up actions or treatments based on the silica levels detected.
| Short Descr | ASSAY OF SILICA | Medium Descr | ASSAY OF SILICA | Long Descr | Silica | Status Code | Statutory Exclusion (from MPFS, may be paid under other methodologies) | Global Days | XXX - Global Concept Does Not Apply | PC/TC Indicator (26, TC) | 9 - Not Applicable | Multiple Procedures (51) | 9 - Concept does not apply. | Bilateral Surgery (50) | 9 - Concept does not apply. | Physician Supervisions | 09 - Concept does not apply. | Assistant Surgeon (80, 82) | 9 - Concept does not apply. | Co-Surgeons (62) | 9 - Concept does not apply. | Team Surgery (66) | 9 - Concept does not apply. | Diagnostic Imaging Family | 99 - Concept Does Not Apply | CLIA Waived (QW) | No | APC Status Indicator | Conditionally packaged laboratory tests | Type of Service (TOS) | 5 - Diagnostic Laboratory | Berenson-Eggers TOS (BETOS) | T1H - Lab tests - other (non-Medicare fee schedule) | MUE | 1 | CCS Clinical Classification | 233 - Laboratory - Chemistry and Hematology |
| 90 | Reference (outside) laboratory: when laboratory procedures are performed by a party other than the treating or reporting physician or other qualified health care professional, the procedure may be identified by adding modifier 90 to the usual procedure number. |
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| 2013-01-01 | Changed | Medium Descriptor changed. |
| Pre-1990 | Added | Code added. |
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