Laboratory Fee Schedule
Procedure #: MZZ0750A
CPT: 87798
| Synonym(s): | PCR, Rubeola |
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| Requisition Form | G-2V |
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| Test Description | Testing of swab specimens from suspected measles cases to detect
the presence of measles virus RNA in symptomatic patients. |
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| Pre-Approval Needed | Yes. Contact your local or state epidemiologist if measles is
suspected. Contact information can be found at the following link:
http://www.dshs.texas.gov/idcu/investigation/conditions/contacts/ |
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| Supplemental Information Required | Date of onset |
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| Supplemental Form(s) | N/A |
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| Performed on Specimens from (sources) | Human |
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| Sample/Specimen Type for Testing | - Preferred: Throat swabs
- Acceptable: Nasopharyngeal swabs
- Specimens must be collected using only swabs with a synthetic tip, such as nylon, Dacron, rayon and an aluminum or plastic shaft.
- Do not use swabs with cotton tips or wooden shafts.
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| Minimum Volume/Size Required | 1 mL –2 mL |
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| Storage/Preservation Prior to Shipping | - Store and ship cold at 2°C–8°C if specimen will arrive at the Laboratory within 48 hours of collection.
- Store and ship frozen at -70°C or colder if specimen will arrive at the Laboratory more than 48 hours after collection.
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| Transport Medium | - Universal transport media (UTM)
- Viral transport media (VTM)
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| Specimen Labeling | - At least two patient-specific identifiers required on specimen (e.g. patient full name, date of birth, medical record number).
- Three unique patient identifiers are preferred.
- Patient identifiers on specimen label must exactly match identifiers on G-2V submission form. (e.g. abbreviated name on label and full name on form is not acceptable.)
- Additional DSHS Laboratory specimen labeling guidelines available online here.
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| Shipping and Specimen Handling Requirements | - Ship according to Dangerous Goods Regulations, IATA, and/or CFR 49.
- Category B Biological Substance, UN3373 shipping requirements apply.
- Submitters are responsible for packaging and shipping specimens according to regulatory requirements.
- Store and ship cold at 2°C–8°C if specimen will arrive at the Laboratory within 48 hours of collection.
- Store and ship frozen at -70°C or colder if specimen will arrive at the Laboratory more than 48 hours after collection.
- Additional DSHS Laboratory specimen shipping guidelines online here.
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| Method | Real-time RT-PCR |
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| Turn-around Time | 2 business days |
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| Interferences/Limitations | - Calcium alginate swabs are unacceptable.
- Cotton swabs with wooden shafts are not recommended as they interfere with testing.
- False negative may result if specimen is improperly collected, transported, or handled.
- Detection of viral RNA does not imply that the corresponding virus is infectious or is the causative agent for clinical symptoms.
- A negative result does not preclude measles infection.
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| Common Causes for Rejection | - Patient identifiers on the specimen and on the G-2V submission
form do not match. - Improper shipping conditions.
- Expired media or collection container.
- Discrepancies between specimen label and submission form.
- Incomplete, illegible, or missing submission form.
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| Additional Information | N/A |
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