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Test Code HIAAR 5-Hydroxyindoleacetic Acid, Random, Urine


Ordering Guidance


This test uses a random urine collection to assess 5-hydroxyindoleacetic acid concentrations. If a 24-hour urine collection is preferred, order HIAA / 5-Hydroxyindoleacetic Acid, 24 Hour, Urine.



Necessary Information


Patient's age and sex are required.



Specimen Required


Patient Preparation:

1. Some medications could interfere with test results. The ordering provider should decide if any medications should be stopped and when they should be restarted. If clinically feasible, discontinue the following medications at least 48 hours prior to specimen collection:

-Acetaminophen (Tylenol or generic versions)

-Tryptophan containing supplements

2. For 48 hours prior to the urine collection, the patient should:

Limit the following to one serving per day:

-Fruits

-Vegetables

-Nuts

-Caffeinated beverages or foods

 

Supplies: Urine Tubes, 10 mL (T068)

Container/Tube: Plastic, 10-mL urine tube

Specimen Volume: 5 mL

Collection Instructions:

1. Collect a random urine specimen.

2. Store and send refrigerate


Useful For

Biochemical diagnosis and monitoring of intestinal carcinoid syndrome using random urine specimens

Method Name

Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)

Reporting Name

5-HIAA, Random, U

Specimen Type

Urine

Specimen Minimum Volume

2 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Urine Refrigerated (preferred) 56 days
  Frozen  365 days

Reference Values

5-HIAA, mg/g creatinine

99th percentile cutoff

Age

Female

Male

 

≤23 months

≤17.53

≤16.42

 

24-35 months

≤17.07

≤15.96

 

3 years

≤16.70

≤15.60

 

4 years

≤16.03

≤14.93

 

5 years

≤15.26

≤14.17

 

6 years

≤14.40

≤13.34

 

7 years

≤13.47

≤12.43

 

8 years

≤12.52

≤11.52

 

9 years

≤11.58

≤10.63

 

10 years

≤10.67

≤9.79

 

11 years

≤9.81

≤9.00

 

12 years

≤9.02

≤8.29

 

13 years

≤8.32

≤7.65

 

14 years

≤7.70

≤7.08

 

15 years

≤7.16

≤6.59

 

16 years

≤6.72

≤6.15

 

17 years

≤6.36

≤5.78

 

18 years

≤6.08

≤5.45

 

19 years

≤5.88

≤5.17

 

20 years

≤5.73

≤4.93

 

21 years

≤5.64

≤4.73

 

22 years

≤5.59

≤4.55

 

23 years

≤5.57

≤4.40

 

24 years

≤5.57

≤4.28

 

25 years

≤5.58

≤4.19

 

26 years

≤5.61

≤4.11

 

27 years

≤5.64

≤4.06

 

28 years

≤5.67

≤4.03

 

29 years

≤5.70

≤4.02

 

30 years

≤5.72

≤4.01

 

31 years

≤5.75

≤4.02

 

32 years

≤5.77

≤4.03

 

33 years

≤5.78

≤4.05

 

34 years

≤5.79

≤4.06

 

35 years

≤5.80

≤4.08

 

36 years

≤5.80

≤4.09

 

37 years

≤5.80

≤4.11

 

38 years

≤5.80

≤4.12

 

39 years

≤5.81

≤4.14

 

40 years

≤5.82

≤4.17

 

41 years

≤5.85

≤4.22

 

42 years

≤5.89

≤4.27

 

43 years

≤5.95

≤4.35

 

44 years

≤6.04

≤4.43

 

45 years

≤6.14

≤4.53

 

46 years

≤6.26

≤4.63

 

47 years

≤6.40

≤4.75

 

48 years

≤6.55

≤4.86

 

49 years

≤6.71

≤4.99

 

50 years

≤6.86

≤5.11

 

51 years

≤7.01

≤5.24

 

52 years

≤7.15

≤5.37

 

53 years

≤7.29

≤5.51

 

54 years

≤7.41

≤5.64

 

55 years

≤7.52

≤5.78

 

56 years

≤7.62

≤5.91

 

57 years

≤7.71

≤6.05

 

58 years

≤7.80

≤6.17

 

59 years

≤7.88

≤6.29

 

60 years

≤7.95

≤6.41

 

61 years

≤8.02

≤6.51

 

62 years

≤8.09

≤6.60

 

63 years

≤8.15

≤6.69

 

64 years

≤8.21

≤6.76

 

65 years

≤8.28

≤6.82

 

66 years

≤8.34

≤6.88

 

67 years

≤8.40

≤6.93

 

68 years

≤8.46

≤6.97

 

69 years

≤8.52

≤7.00

 

70 years

≤8.58

≤7.03

 

71 years

≤8.65

≤7.06

 

72 years

≤8.71

≤7.08

 

73 years

≤8.77

≤7.10

 

74 years

≤8.82

≤7.11

 

75 years

≤8.86

≤7.11

 

76 years

≤8.90

≤7.11

 

77 years

≤8.92

≤7.10

 

78 years

≤8.93

≤7.09

 

79 years

≤8.93

≤7.07

 

80 years

≤8.92

≤7.05

 

81 years

≤8.90

≤7.02

 

82 years

≤8.88

≤7.00

 

83 years

≤8.86

≤6.98

 

84 years

≤8.85

≤6.97

 

85 years

≤8.84

≤6.95

 

86 years

≤8.84

≤6.94

 

87 years

≤8.84

≤6.94

 

88 years

≤8.84

≤6.94

 

>or= 89 years

≤8.85

≤6.93

 

Day(s) Performed

Monday through Friday

Report Available

2 to 4 days

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Test Classification

This test was developed, and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the US Food and Drug Administration.

CPT Code Information

83497

LOINC Code Information

Test ID Test Order Name Order LOINC Value
HIAAR 5-HIAA, Random, U 11145-0

 

Result ID Test Result Name Result LOINC Value
616090 5-HIAA, Random, U 11145-0