Clinical Utilities

CPT Codes
83519

The CPT codes provided are based on AMA guidelines
and are for informational purposes only. CPT coding is the
sole responsibility of the billing party. Please direct any questions
regarding coding to the payer being billed.

Reference Range
AGE                                              Units (mg/L)
1-7 Days                                         <0.7
8-15 Days                                        0.5-1.4
16 Days - 1 Year                              0.7-3.6
2 Years                                            0.8-3.9
3 Years                                            0.9-4.3
4 Years                                            1.0-4.7
5 Years                                            1.1-5.2 
6 Years                                            1.3-5.6 
7 Years                                            1.4-6.1 
8 Years                                            1.6-6.5 
9 Years                                            1.8-7.1  
10 Years                                           2.1-7.7
11 Years                                           2.4-8.4
12 Years                                           2.7-8.9
13 Years                                           3.1-9.5
14 Years                                           3.1-10.0 
15 Years                                           3.5-10.0  
16 Years                                           3.4-9.5
17 Years                                           3.2-8.7 
18 Years                                           3.1-7.9  
19 Years                                           2.9-7.3   
20 Years                                           2.9-7.2  
21-30 Years                                      3.4-7.8 
31-40 Years                                      3.4-7.0 
41-50 Years                                      3.3-6.7
51-60 Years                                      3.4-6.9
61-70 Years                                      3.0-6.6
71-80 Years                                      2.5-5.7
81-85 Years                                      2.2-4.5
> 85 Years                                        No Primary Data

Reference Range (mg/L) by Pubertal (Tanner Stage):
                                              Females                    Males
Tanner I                                 1.2-6.4                       1.4-5.2
Tanner II                                2.8-6.9                       2.3-6.3  
Tanner III                               3.9-9.4                       3.1-8.9
Tanner IV                               3.3-8.1                       3.7-8.7
Tanner V                                2.7-9.1                       2.6-8.6  
                 
This test was developed and its performance characteristics 
determined by Quest Diagnostics Nichols Institute. It has 
not been cleared or approved by the U.S. Food and Drug 
Administration. The FDA has determined that such clearance 
or approval is not necessary. Performance characteristics 
refer to the analytical performance of the test.

Component Information