Carbohydrate Antigen (CA) 19-9 Pretreatment Lab Value records the CA 19-9 value prior to treatment. CA 19-9 is a tumor marker that has prognostic significance for pancreatic cancer.

CA 19-9 Pretreatment Lab Value is a strong predictor of resectability in the absence of metastatic disease. It is a new data item for cases diagnosed 01/01/2021+.

Item #	Length	Source of Standard	Year Implemented	Version Implemented	Year Retired	Version Retired
3942	6	NAACCR	2021	21

0.0	0.0 Units/milliliter (U/ml) exactly
0.1-9999.9	0.1-9999.9 U/ml Exact value to nearest tenth in U/ml)
XXXX.1	10,000 U/ml or greater
XXXX.2	Lab value not available, physician states CA 19-9 is negative/normal
XXXX.3	Lab value not available, physician states CA 19-9 is positive/elevated/high
XXXX.7	Test ordered, results not in chart
XXXX.8	Not applicable: Information not collected for this case If this information is required by your standard setter, use of code XXXX.8 may result in an edit error.
XXXX.9	Not documented in medical record CA (Carbohydrate Antigen) 19-9 Pretreatment Lab Value not assessed or unknown if assessed
Blank	Diagnosis year is prior to 2021

Each Site-Specific Data Item (SSDI) applies only to selected primary sites, histologies, and years of diagnosis. Depending on applicability and standard-setter requirements, SSDIs may be left blank.