Site-Specific Factor 12

Carbohydrate Antigen 19-9 (CA 19-9) Lab Value


**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.




NAACCR #2866
Code Description
000 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
997 Test ordered, results not in chart
998 Test not done (test not ordered and not performed)
999 Unknown or no information
Not documented in patient record