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Troponins are a group of regulatory proteins that play a crucial role in the contraction of skeletal and smooth muscle by forming calcium bonds. Specifically, Troponin T binds to tropomyosin, creating a complex that is essential for muscle contraction. Troponin I, on the other hand, binds to actin and stabilizes the Troponin T-tropomyosin complex. The measurement of troponin levels in the blood is significant in the context of cardiac health, as elevated troponin levels, particularly when accompanied by cardiac symptoms such as chest pain, are considered diagnostic indicators of cardiac injury. This test is frequently ordered in the Emergency Department for patients who present with potential myocardial infarction, allowing for timely diagnosis and intervention. The troponin test is typically repeated at intervals of six hours to monitor changes in troponin levels. It is often ordered alongside other cardiac biomarker tests, including creatine kinase (CK), CK-MB, and myoglobin, to provide a comprehensive assessment of cardiac function. A blood sample for this test is obtained through a separately reportable venipuncture, and the serum or plasma is then analyzed for the presence of Troponin T.
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Troponin testing is indicated in various clinical scenarios, particularly when assessing potential cardiac injury. The following conditions warrant the performance of this test:
The procedure for conducting a troponin test involves several key steps, which are outlined below:
After the troponin test is performed, the patient may be monitored for any immediate reactions to the venipuncture. The results of the test are typically available within a short period, allowing for timely clinical decision-making. If troponin levels are elevated, further evaluation and management may be necessary, which could include additional testing or interventions based on the patient's overall clinical picture. It is also common practice to repeat the troponin test at six-hour intervals to monitor changes in troponin levels, which can provide further insight into the patient's cardiac status and guide treatment decisions.
| Short Descr | ASSAY OF TROPONIN QUAL | Medium Descr | ASSAY OF TROPONIN QUALITATIVE | Long Descr | Troponin, qualitative | 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. | 91 | Repeat clinical diagnostic laboratory test: in the course of treatment of the patient, it may be necessary to repeat the same laboratory test on the same day to obtain subsequent (multiple) test results. under these circumstances, the laboratory test performed can be identified by its usual procedure number and the addition of modifier 91. note: this modifier may not be used when tests are rerun to confirm initial results; due to testing problems with specimens or equipment; or for any other reason when a normal, one-time, reportable result is all that is required. this modifier may not be used when other code(s) describe a series of test results (eg, glucose tolerance tests, evocative/suppression testing). this modifier may only be used for laboratory test(s) performed more than once on the same day on the same patient. | GA | Waiver of liability statement issued as required by payer policy, individual case | Q1 | Routine clinical service provided in a clinical research study that is in an approved clinical research study |
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| 2013-01-01 | Changed | Medium Descriptor changed. |
| 2011-01-01 | Changed | Short description changed. |
| 1998-01-01 | Added | First appearance in code book in 1998. |
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