Site-Specific Factor 17
Urinary 5-Hydroxyindoleacetic Acid (5-HIAA) Lab Value
Notes
**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 005Default
999NAACCR Item
NAACCR #2871Metadata
None| Code | Description |
|---|---|
| 000 | 0 milligrams/24 hours (mg)/24hours |
| 001 | 1 or less milligrams/24hours |
| 002-979 | 2-979 milligrams/24hours |
| 980 | 980 or greater milligrams/24hours |
| 988 | Not applicable: Information not collected for this case |
| 997 | Test ordered, results not in chart |
| 998 | Test not done (test was not ordered and was not performed) |
| 999 | Unknown or no information Not documented in patient record |