NETStomach

Note 1: Carcinoid tumors can release large amounts of serotonin. 5-Hydroxyindoleacetic acid (5-HIAA) is a breakdown product of the hormone serotonin. The 5-HIAA test measures the amount of acid secreted in the urine over a 24-hour period.
Note 2: Record to the nearest milligram (mg) the highest 5-HIAA lab value documented in the medical record prior to treatment. For example, code a pre-treatment 5-HIAA of 550 mg over 24 hours as 550.
Note 3: Code 000 is reserved for exactly 0 mg (no measurable amount of 5-HIAA). Do not round tiny values down to 0 ng/ml; any measured value less than or equal to 1 mg should be coded 001. For code 001, also round 1.1-1.4 mg down to 1 ng/ml. For codes 002-979, round values to the nearest mg.
Note 4: For an uncertain value, record the stated closest value. For example, code a value stated as "less than 5 mg" as 005.

Code	Description
000	0 milligrams/24hours (mg/24 hours)
001	1 or less mg/24hours
002-979	2 - 979 mg/24hours
980	980 or greater mg/24hours
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 "Test 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 12Urinary 5-HIAA Lab Value