abcdefghijklmn
opqrstuvwxyz
Test Menu
Test Change Details
Allergy & Immunology
Cardiology & Coagulation
Dermatopathology
Endocrinology
Gastroenterology
Genetics
Hepatology
Infectious Disease
Microbiology
Nephrology
Neurology
Oncology
Pathology
Pediatrics
Rheumatology
Toxicology
Urology
Women's Health
7675X: Lactose Tolerance Test, 5 Specimens (50g) Print View
Fasting Specimen     mg/dL 
30 min Specimen     mg/dL 
1 hour Specimen     mg/dL 
2 hour Specimen     mg/dL 
3 hour Specimen     mg/dL 
Comment      

PRIMARY
1 Plasma Fluoridated/Oxalat 1 (0.5) mL   Frozen - 28 Day(s)/Refrigerated - 7 Day(s)/Room Temperature - 7 Day(s)  
ALTERNATE
  Whole Blood Oxalate 1 (0.5) mL   Room Temperature - 24 Hour(s)/Refrigerated - 72 Hour(s)  
  Plasma Heparinized 1 (0.5) mL   Frozen - 28 Day(s)/Refrigerated - 7 Day(s)/Room Temperature - 48 Hour(s)  
  Serum 1 (0.5) mL   Frozen - 28 Day(s)/Refrigerated - 7 Day(s)/Room Temperature - 4 Day(s)  

Results may be used to evaluate deficiency of small bowel mucosal lactase, which may be associated with intolerance to lactose, manifested by diarrhea and other symptoms following ingestion of milk.

Important Note: If patient is to be drawn at Quest Diagnostics PSC,
the test must be scheduled at a PSC capable of administering the dose.
Please call 1-866-MyQuest to schedule. Fasting required. Fasting is
defined as no consumption of food or beverage other than water for at
least 8 hours before testing.

Immediately after a fasting specimen is obtained, have patient ingest
a 50 g dose of lactose (supplied by laboratory). Draw subsequent
specimens 1/2, 1, 2 and 3 hours later. Label each with the specific
draw time.

Note: Children should receive 1.75g lactose per kg ideal body weight,
up to 50 g.
Setup Schedule
Sunday-Saturday

Reported (Analytical Time)
Next day

CPT Codes
82947,82950x4

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.

Notes
Reject Criteria: Unspun serum separator tube; anticoagulants other than lithium or sodium heparin or fluoride/oxalate; red-top or non-plasma separator green-top tubes. Transport Temperature: Room temperature Specimen Requirements: Preferred: 1 mL (0.5 mL minimum) plasma collected in each of five fluoride/oxalate (gray-top) tubes Acceptable Specimens: Lithium or sodium heparin or serum (separated from cells immediately) collected in a plastic screw-cap vials or spun SST Methodology: Spectrophotometry






1996 - 2017 Quest Diagnostics Nichols Institute of Valencia
For test information, please call Client Services at 800-421-4449.

San Francisco Web Design & Database