Collaborative Stage

Note 1: Carbohydrate Antigen 19-9 (CA 19-9) is a tumor marker that has value in the management of certain malignancies.
Note 2: Record to the nearest tenth in Units/milliliter (U/ml) the highest CA 19-9 lab value documented in the medical record prior to treatment. For example, a pretreatment CA 19-9 of 60 U/ml would be recorded as 600.
Note 3: Code 000 is reserved for exactly 0.0 U/ml (no measurable amount of CA 19 9). Do not round tiny values down to 0.0 U/ml; any measured value less than or equal to 0.1 U/ml should be coded 001. For code 001, also round 0.11-0.14 U/ml down to 0.1 U/ml. For codes 002-980, round values to the nearest tenth of U/ml.
Note 4: For an uncertain value, record the stated closest value. For example, code a value stated as "less than 0.5 U/mL" as 005.
Note 5: Use code 997 if there is no actual pre-treatment CA 19-9 lab value available but an interpretation of the test result is stated.

Code	Description
000	CONVERTED AND CODE REUSED V0203 Prior to V0203 code defined as "Test not done (test not ordered and not performed)". Cases converted to code 998 with V0203 and code 000 redefined as "0.0 Units/milliliter (U/ml) exactly". 0.0 Units/milliliter (U/ml) exactly
001	0.1 or less U/ml Stated as less than 0.1 U/ml with no exact value
002-979	0.2-97.9 U/ml (Exact value to nearest tenth in U/ml)
980	98.0 or greater U/ml
988	Not applicable: Information not collected for this case (If this information is required by your standard setter, use of code 988 may result in an edit error.)
997	Test ordered, results not in chart
998	CONVERTED AND CODE REUSED V0203 Prior to V0203 code defined as "ordered, results not in chart". Cases converted to code 997 with V0203 and code 998 redefined as "Test not done (test not ordered and not performed)". Test not done (test not ordered and not performed)
999	Unknown or no information Not documented in patient record

CS Site-Specific Factor 12
Carbohydrate Antigen 19-9 (CA 19-9) Lab Value