Geisinger Medical Laboratories/Geisinger Proven Diagnostics Test Catalog

Order Display Name: Geisinger Epic Procedure Code Or ID CPT Code:  


Geisinger Epic Procedure Code: LAB2969         Geisinger Epic ID: 33396

Specimen type:
Sweat (or fluid)
Preferred collection container:
Microsample cup provided in collection kit
Specimen required:
15 ┬ÁL sweat
Special notes:
Test must be scheduled via Pulmonary Medicine Department. Call 1-800-275-6401 x 16266 or dial direct 570-271-6266. Testing is performed at GMC Monday-Friday at 9:00am and 10:00am only. No weekends or holidays.
Patient preparation:
Patient in stable health and hydrated. Test coils used to collect sweat from both left and right limbs of child.

Transport temperature:
Room temperature. Transport immediately.
Specimen stability:
Room temperature: 72 hours.
Rejection criteria:
Stability limits exceeded.

Reference interval:
<30 mmol/L
Interpretation guide:
<30 mmol/L: CF unlikely
30 - 59 mmol/L : Intermediate
>=60 mmol/L: Indicative of CF
Additional information:
For early diagnosis of cystic fibrosis (CF).
CPT code(s):
89230, 82438 also billed if specimen sufficient
Note: The billing party has sole responsibility for CPT coding.  Any questions regarding coding should be directed to the payer being billed.  The CPT codes provided by GML are based on AMA guidelines and are for informational purposes only.
Test includes:
Sweat chloride.
Coulometric Titration
Sweat chloride, sweat test, SWCLB, SWCLB1, SWCLB2,
Cystic fibrosis, SweatCl
Sweat test evaluation
Clinical significance:
Elevated chloride in sweat specimens induced by iontophoresis indicates the likelihood of cystic fibrosis. Sweat specimens (Sweat Test 1 and Sweat Test 2) are taken from both arms (or legs) of patients.
Doctoral Director(s:)
Hoi-Ying Elsie Yu, PhD, DABCC
Sheng-Ying (Margaret) Lo, PhD, DABCC    
Review Date: 01/01/2022

Performing Locations

Geisinger Medical Center

Performing laboratory: Stat Lab
Technical Lead: Karen Delp
Frequency: Monday-Friday 9 and 10 a.m. only. No weekends or holidays.
Performed STAT? No
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