Sweat Chloride and Sweat Chloride Collection

Includes: Sweat Chloride - left; Sweat Chloride - right;

This test must be scheduled with Phlebotomy Services.

Please call Sweat Chloride Collections, Appointment Scheduling: 984-974- 1760.

Sweat Chloride Collections are available between the hours of 08:30 AM until 13:00 PM Monday-Friday; No weekends or holidays.

Only four Sweat Chloride collection appointments are available per day.

Test ID

LAB1726

LAB6059

EPIC ORDER

SWEAT CHLORIDE; SWEAT CHLORIDE COLLECTION

CPT Code(s)

82438, 89230

Group/Individual Test

Group

Laboratory

Special Chemistry Lab

Tube Station

N/A-must be hand delivered

Specimen

Routine:

Sterile Sweat Collection; bilateral collection; minimum 15uL Sweat;

Stability:

Refrigerated 2-8°C: 72 hours

Availability

Routine:

Monday-Friday, 09:00-13:00; 4 appointments per weekday; Not available STAT

Turnaround Time

12 hours

Reference Range

Chloride (mmol/L)	Interpretation (All Ages)
<30	Cystic Fibrosis Unlikely Intermediate Indicative of Cystic Fibrosis
30-59	Intermediate; recommend further study to establish or rule out a Cystic Fibrosis diagnosis
≥60	Indicative of Cystic Fibrosis
Adopted from: "Diagnosis of Cystic Fibrosis: Consensus Guidelines from the Cystic Fibrosis Foundation, 2017"

Methodology:

Coulometric Titration

Reviewed by J. Carr on November 19, 2025

UNC Hospitals
McLendon Clinical Laboratories
101 Manning Drive
Chapel Hill, NC 27514