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HelpTest Code SMA Anti-Smooth Muscle Antibody
Additional Codes
| Epic Ordering Code | LAB3000 |
| NBS code | LBC02648 |
| Service code | 32141 |
Specimen Requirements
Submit only one of the following:
| Preferred: | Acceptable: |
| Yellow Top | Red Top |
Processing Requirements
Allow specimen to clot for 30 mins and centrifuge within 2 hours
Specimen type: Serum
Volume: 0.5mL
Specimen Stability
| Specimen Type | Serum |
|---|---|
| Ambient | 8 hours |
| Refrigerate | 2 days |
| Frozen | 1 year (preferred) |
Specimen Condition
| Gross Haemolysis | Reject |
|---|---|
| Icterus | OK |
| Gross Lipaemia | Reject |
| Others | Not applicable |
Methodology
Enzyme Immunoassay
Days and Times Performed
Monday, TAT 2 - 8 days
Reference Interval
No antibody detected: < 20 Units
Borderline: 20 – 30 Units
Positive: > 30 Units
Testing Laboratory
National University Hospital
Clinical Chemistry, 67724346
Useful For
Positive in 50 - 80% patients with chronic active hepatitis. Negative in extraheptic biliary obstruction.
Update
Last updated 24/06/2026
LOINC Code Information
44706-0
Alias
Actin
F-Actin
SMA (Smooth Muscle Antibodies)