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HelpTest Code UNHB Hemoglobin Stability, Blood (Non-Orderable)
Additional Codes
EPIC: LAB1032
SUNQUEST: UNHBM
Reporting Name
Hb Stability, BUseful For
Only orderable as part of a profile or as a reflex. For more information see:
HAEV1 / Hemolytic Anemia Evaluation, Blood
HBEL1 / Hemoglobin Electrophoresis Evaluation, Blood
THEV1 / Thalassemia and Hemoglobinopathy Evaluation, Blood and Serum
REVE2 / Erythrocytosis Evaluation, Blood
MEV1 / Methemoglobinemia Evaluation, Blood
Work-up of congenital hemolytic anemias
Method Name
Only orderable as part of a profile or as a reflex. For more information see:
-HAEV1 / Hemolytic Anemia Evaluation, Blood
-HBEL1 / Hemoglobin Electrophoresis Evaluation, Blood
-THEV1 / Thalassemia and Hemoglobinopathy Evaluation, Blood and Serum
-REVE2 / Erythrocytosis Evaluation, Blood
-MEV1 / Methemoglobinemia Evaluation, Blood
Isopropanol and Heat Stability
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Specimen Type
Whole Blood EDTASpecimen Required
Only orderable as part of a profile or as a reflex. For more information see:
-HAEV1 / Hemolytic Anemia Evaluation, Blood
-HBEL1 / Hemoglobin Electrophoresis Evaluation, Blood
-THEV1 / Thalassemia and Hemoglobinopathy Evaluation, Blood and Serum
-REVE2 / Erythrocytosis Evaluation, Blood
-MEV1 / Methemoglobinemia Evaluation, Blood
Specimen Minimum Volume
1 mL
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Whole Blood EDTA | Refrigerated | 7 days |
Reject Due To
| Gross hemolysis | Reject |
Reference Values
Only orderable as part of a profile or as a reflex. For more information see:
-HAEV1 / Hemolytic Anemia Evaluation, Blood
-HBEL1 / Hemoglobin Electrophoresis Evaluation, Blood
-THEV1 / Thalassemia and Hemoglobinopathy Evaluation, Blood and Serum
-REVE2 / Erythrocytosis Evaluation, Blood
-MEV1 / Methemoglobinemia Evaluation, Blood
Normal (reported as normal [stable] or abnormal [unstable])
Day(s) Performed
Monday through Friday
CPT Code Information
83068
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| UNHB | Hb Stability, B | 4639-1 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| 9095 | Hb Stability, B | 4639-1 |
Clinical Information
Unstable hemoglobin disease is rare and may be caused by any of a large number of hemoglobin variants. They are inherited as autosomal dominant traits. The severity of the disease varies according to the hemoglobin variant; there may be no clinical symptoms, or the disease may produce a mild, moderate, or severe hemolytic anemia.
The stained peripheral blood smear shows anisocytosis, poikilocytosis, basophilic stippling, polychromasia, and sometimes, hypochromia. The reticulocyte count may be increased. Splenomegaly and Heinz bodies may also be present.