CA 19.9 (Roche)
General Information
Lab Name
CA 19.9 (Roche)
Lab Code
C199RD
Epic Name
(not orderable in Epic)
Synonyms
CA19-9, Cancer Antigen 19-9, Carbohydrate Antigen 19-9
Interpretation
Method
Roche Cobas e801 by electrochemiluminescence immunoassay.
Reference Range
Units: U/mL| Female | Male | Unknown | |||
|---|---|---|---|---|---|
| Age | Range | Age | Range | Age | Range |
| 0- | 0-34 | 0- | 0-34 | ||
Effective date: 09/02/2026
Ref. Range Notes
Patient results determined by assays using different manufacturers, instruments, or methods are not comparable.
Interferences and Limitations
Biotin supplements can cause falsely low values. See Limitations of Laboratory Testing for details.
Ordering & Collection
Specimen Type
Collection
Central Lab Location:
- Preferred specimen: 4 mL blood in GOLD SST tube.
- Acceptable specimen: 4 mL blood in RED TOP tube or ORANGE RST tube.
FHCC Locations:
- Preferred specimen: 4 mL blood in ORANGE RST tube.
- Acceptable specimen: 4 mL blood in GOLD SST tube or RED TOP tube.
Quantity
requested: 1.0 mL
minimum: 0.6 mL
Processing
Storage stability:
- Room temperature: stable for up to 8 hours
- Refrigerated (2–8 °C): stable for up to 7 days
- For longer storage: store at -20 °C or colder for up to 3 months if testing cannot be completed within 7 days
- Important: freeze only once (do not refreeze)
Note: Serum must be removed from SST, PST, or clot prior to storage.
Performance
LIS Dept Code
Chemistry, Automated Panels (CHA)
Performing Location(s)
| CL |
Renton Core Lab
206-520-4600 Clinical Lab, Room 170 |
|
|---|---|---|
| FHCC |
Fred Hutch Alliance Lab
206-606-1088 825 Eastlake Ave, Seattle, WA 98109 |
Fax: 206-606-2027 Includes satellite labs: |
Frequency
Daily
Available STAT?
No