Site-Specific Factor 2

Serum Chromogranin A (CgA) Lab Value


**Note 1:** Chromogranins are a family of proteins in secretory granules found throughout the neuroendocrine system. Serum Chromogranin A (CgA) has been shown to be a useful marker for neuroendocrine tumors. **Note 2:** Record, to the nearest nanogram/milliliter (ng/ml), the highest CgA lab value documented in the medical record prior to treatment. * For example, a pretreatment CgA of 400 ng/ml would be recorded as 400 **Note 3:** Code 000 is reserved for exactly 0 ng/ml (no measurable amount of CgA). Do not round tiny values down to 0 ng/ml; any measured value less than or equal to 1 ng/ml should be coded 001. * For code 001, also round 1.1 - 1.4 ng/ml down to 1 ng/ml * For codes 002-980, round values to the nearest ng/ml **Note 4:** Use code 997 if there is no actual pretreatment CgA lab value available but an interpretation of the test result is stated. **Note 5:** Although CgA is generally a marker for neuroendocrine tumors, if a pretreatment CgA lab value is available for a non-endocrine tumor, code the value. * If a pretreament CgA lab value is not available (endocrine or non-endocrine tumor), code 999




NAACCR #2890
Code Description
000 0 nanogram/milliliter (ng/ml)
001 1 or less ng/ml
Stated as less than 1 ng/ml with no exact value
002-979 002-979 ng/ml
(Exact value to nearest ng/ml)
980 980 or greater ng/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