CPT® Code 83634

Code deleted, see 82951, 82952, 91065.

Official Description

Lactose, urine; quantitative

Common Language Description

The CPT® Code 83634 refers to a laboratory test that quantitatively measures the amount of lactose present in urine. Lactose is a type of sugar, specifically a disaccharide, that is primarily found in milk and dairy products. In the human body, lactose is typically broken down into two simpler sugars, glucose and galactose, by the enzyme lactase, which is produced in the small intestine. The presence of lactose in urine, known as lactosuria, can occur under various physiological conditions. For instance, it may be a normal finding during late pregnancy or lactation, particularly when the flow of milk is obstructed. Additionally, lactosuria can be observed in newborn infants as a temporary condition that does not present gastrointestinal symptoms. The underlying cause of lactosuria is often linked to lactose intolerance, a condition characterized by the impaired ability to digest lactose due to insufficient lactase production. This results in lactose passing through the digestive system without being broken down, leading to its absorption into the bloodstream and subsequent excretion in urine. To perform the test, a urine sample is collected, which can be obtained either through random voiding or catheterization. The qualitative assessment of lactose can be conducted using CPT® Code 83633, while the quantitative measurement, which is the focus of CPT® Code 83634, may necessitate a timed urine specimen collection. The analysis of the urine sample is typically carried out using chromatography, a method that separates and quantifies the components of the urine, allowing for an accurate measurement of lactose levels.

1. Indications

The quantitative measurement of lactose in urine, as indicated by CPT® Code 83634, is performed under specific clinical circumstances. The following conditions may warrant this laboratory test:

Normal Physiological States Lactosuria may be observed in late pregnancy and during lactation, particularly when there is an obstruction to milk flow.
Newborn Infants A transient condition of lactosuria can occur in newborns without accompanying gastrointestinal symptoms.
Lactose Intolerance The test is indicated for individuals suspected of having lactose intolerance, a condition that results in the abnormal permeability of the gastric mucosa to lactose.

2. Procedure

The procedure for conducting the quantitative urine lactose test involves several key steps, which are outlined below:

Step 1: Sample Collection A urine sample is obtained from the patient. This can be done through random voiding, where the patient provides a sample at any time, or through catheterization, which involves inserting a catheter into the bladder to collect urine directly. The method of collection may depend on the clinical scenario and the need for a timed specimen.
Step 2: Timed Urine Specimen Collection If a quantitative measurement is required, a timed urine specimen collection may be necessary. This involves collecting urine over a specified period, such as 24 hours, to ensure an accurate assessment of lactose levels in the urine.
Step 3: Laboratory Analysis The collected urine sample is then sent to a laboratory for analysis. The laboratory utilizes chromatography, a technique that separates the components of the urine sample, allowing for the precise quantification of lactose present in the urine.

3. Post-Procedure

After the urine sample has been collected and analyzed, the results will be interpreted by a qualified healthcare professional. Depending on the findings, further clinical evaluation may be necessary, especially if elevated levels of lactose are detected, which could indicate lactose intolerance or other underlying conditions. Patients may be advised on dietary modifications or further testing based on the results of the lactose measurement. It is important to follow up with the healthcare provider to discuss the implications of the test results and any recommended next steps.

Short Descr	ASSAY OF URINE FOR LACTOSE
Medium Descr	LACTOSE URINE QUANTITATIVE
Long Descr	Lactose, urine; quantitative
Status Code	Statutory Exclusion (from MPFS, may be paid under other methodologies)
Global Days	XXX - Global Concept Does Not Apply
PC/TC Indicator (26, TC)	9 - Not Applicable
Multiple Procedures (51)	9 - Concept does not apply.
Bilateral Surgery (50)	9 - Concept does not apply.
Physician Supervisions	9 - Concept does not apply.
Assistant Surgeon (80, 82)	9 - Concept does not apply.
Co-Surgeons (62)	9 - Concept does not apply.
Team Surgery (66)	9 - Concept does not apply.
Diagnostic Imaging Family	99 - Concept Does Not Apply
APC Status Indicator	Items and Services Packaged into APC Rates
Type of Service (TOS)	5 - Diagnostic Laboratory
Berenson-Eggers TOS (BETOS)	none
MUE	Not applicable/unspecified.
CCS Clinical Classification	233 - Laboratory - Chemistry and Hematology