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CPT:
Contact CPT coding department at 800-222-7566, ext 6-8400.
Synonyms
- High Resolution G-Banding
- Prophase Analysis
Test Includes
20 prophase to prometaphase cells are studied following cell synchronization. Two cells are karyotyped with the highest resolution.
Special Instructions
Pertinent medical findings must accompany request for chromosome analysis.
Expected Turnaround Time
10 - 15 days
Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.
Related Documents
Specimen Requirements
Specimen
Whole blood
Volume
10 mL (adult), 2 mL (pediatric)
Minimum Volume
1 mL
Container
Green-top (heparin) tube
Collection
Using sterile technique, collect 10 mL of blood into a sodium heparin tube or syringe. Invert the tube several times to prevent coagulation. Specimens must be sent the same day as collected and arrive in the laboratory within 48 hours of collection.
Storage Instructions
Specimen should be delivered immediately. Maintain specimen at room temperature. Specimen may be refrigerated if there is a delay in shipment. Do not freeze.
Causes for Rejection
Hemolysis; clotted specimen; use of improper anticoagulant; frozen specimen
Test Details
Use
Detect small chromosome abnormalities not detectable using routine methods; precise identification of abnormal chromosomes previously detected by routine methods
Methodology
Culture of cells in special medium; colcemid arrest of cells in prometaphase stage of mitosis following cell synchronization techniques
LOINC® Map
| Order Code | Order Code Name | Order Loinc | Result Code | Result Code Name | UofM | Result LOINC |
|---|---|---|---|---|---|---|
| 052215 | Chromosome, High Resolution | 052107 | Cells Counted | 62361-1 | ||
| 052215 | Chromosome, High Resolution | 052108 | Cells Karyotyped | 55199-4 | ||
| 052215 | Chromosome, High Resolution | 052109 | Cells Analyzed | 62360-3 | ||
| 052215 | Chromosome, High Resolution | 052110 | GTG Band Resolution Achieved | 62358-7 | ||
| 052215 | Chromosome, High Resolution | 052008 | Cytogenetic Diagnosis | 48818-9 | ||
| 052215 | Chromosome, High Resolution | 052112 | Cytogenetic Interpretation: | 50619-6 | ||
| 052215 | Chromosome, High Resolution | 052113 | Specimen Type | 31208-2 | ||
| 052215 | Chromosome, High Resolution | 052009 | Director Review: | 48672-0 | ||
| 052215 | Chromosome, High Resolution | 512123 | 51967-8 |
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The LOINC® codes are copyright © 1994-2021, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee. Permission is granted in perpetuity, without payment of license fees or royalties, to use, copy, or distribute the LOINC® codes for any commercial or non-commercial purpose, subject to the terms under the license agreement found at https://loinc.org/license/. Additional information regarding LOINC® codes can be found at LOINC.org, including the LOINC Manual, which can be downloaded at LOINC.org/downloads/files/LOINCManual.pdf