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Test Code IGF1 Insulin-like Growth Factor 1

Additional Codes

Epic Ordering Code LAB3005
NBS code LBC13364
Service code 31891

Specimen Requirements

Submit the following:

Container:
Yellow Top

Processing Requirements

Allow specimen to clot for 30 mins and centrifuge within 2 hours. 

Specimen type: Serum

Volume: 0.5 mL

Additional information: For specimens collected outside NUH, aliquot the serum into a secondary tube and send it frozen to the laboratory.

Specimen Stability

Specimen Type Serum
Ambient 24 hours
Refrigerate 48 hours
Frozen 28 days (Preferred)

Specimen Condition

Gross Haemolysis Alert/Reject
Icterus OK
Lipaemia OK
Others Not applicable

Methodology

Electrochemiluminescent Immunoassay

Days and Times Performed

Monday through Friday, TAT 1-4 days

Reference Interval

Age  Male (ug/L) Female (ug/L)
 < 1 yr  18 – 156 14 – 192
1 yr  14 – 203 23 – 243
2 yrs 16 – 222 28 – 256
3 yrs 22 – 229 31 – 249
4 yrs  30 – 236 33 – 237
5 yrs 39 – 250  36 – 234
6 yrs 47 – 275 39 – 246
7 yrs 54 – 312 44 – 279
8 yrs  61 – 356   51 – 334
9 yrs 67 – 405 61 – 408
10 yrs 73 – 456 73 – 495
11 yrs 79 – 506 88 – 585
12 yrs 84 – 551  104 – 665
13 yrs 90 – 589  120 – 719
14 yrs 95 – 618  136 – 729
15 yrs 99 – 633  147 – 691
16 yrs  104 – 633  153 – 611
17 yrs 107 – 615 149 – 509
18 yrs 132 – 476 156 – 466
19 yrs 134 – 450 155 – 449
20 yrs 136 – 421 152 – 429
21 yrs 137 – 394 148 – 410
22 yrs 137 – 370 143 – 392
23 yrs 136 – 348 138 – 375
24 yrs 135 – 328 134 – 359
25 yrs 132 – 310 130 – 343
26 yrs 130 – 295 126 – 329
27 yrs 128 – 282 122 – 315
28 yrs 125 – 271 118 – 303
29 yrs 123 – 263 115 – 292
30 yrs 120 – 257 112 – 281
31 yrs 118 – 253 109 – 271
32 yrs 116 – 250 107 – 263
33 yrs 114 – 247 104 – 255
34 yrs 111 – 244 102 – 248
35 yrs 109 – 242 100 – 242
36 yrs 107 – 239 98 – 238
37 yrs 105 – 236 97 – 234
38 yrs 103 – 234 95 – 231
39 yrs 101 – 231 93 – 228
40 yrs 99 – 229 91 – 227
41 yrs 96 – 226 90 – 225
42 yrs 94 – 223 88 – 224
43 yrs 92 – 221 87 – 222
44 yrs 91 – 218 85 – 221
45 yrs 89 – 216 83 – 220
46  yrs 87 – 214 82 – 219
47 yrs 85 – 211 80 – 218
48 yrs 83 – 209 79 – 218
49 yrs 81 – 207 77 – 217
50 yrs 79 – 205 76 – 215
51 yrs 77 – 203 74 – 214
52 yrs 75 – 201 73 – 212
53 yrs 73 – 200 71 – 210
54 yrs 71 – 198 70 – 207
55 yrs 69 – 196 69 – 204
56 yrs 67 – 195 67 – 201
57 yrs 65 – 194 66 – 198
58 yrs 64 – 193 65 – 194
59 yrs 62 – 192 63 – 190
60 yrs 61 – 191 62 – 186
61 yrs 60 – 190 61 – 182
62 yrs 59 – 189 60 – 179
63 yrs 59 – 188 58 – 176
64 yrs 58 – 188 57 – 173
65 yrs 57 – 187 56 – 170
66 yrs 57 – 186 56 – 168
67 yrs 56 – 186 55 – 166
68 yrs 56 – 186 54 – 164
69 yrs 55 – 185 54 – 163
70 yrs 55 – 185 54 – 162
71 yrs 54 – 184 53 – 161
72 yrs 54 – 184 53 – 160
73 yrs 53 – 184 53 – 160
74 yrs 52 – 184 53 – 160
75 yrs 52 – 184 54 – 160
76 yrs 51 – 184 54 – 161
77 yrs 51 – 184 54 – 162
≥ 78 yrs 50 – 184 –
78 yrs – 54 – 163
79 yrs – 55 – 164
≥ 80 yrs – 55 – 166

Testing Laboratory

National University Hospital
Clinical Chemistry, 67724346

Useful For

Diagnosis of human growth hormone excess and deficiency disorders.

Update

Last updated 26/07/2026

LOINC Code Information

2484-4

Alias

Insulin-like Growth Factor Binding

Somatomedin C