skip to content »

Genetic Labs

Houston, Texas

Genetic Laboratory
Baylor Genetics Laboratories
not shown on screen

Medical Genetics Test Details

View Custom Req   |    Tests in Custom Req: 0
Search Tests: (Search by disease, test name, gene name, test code, or keyword. Return to test index.)

    Browse:  #ABCDEFGHIJKLMNOPQRSTUVWXYZ
The American Medical Association (AMA) Current Procedural Terminology (CPT) codes and Healthcare Common Procedure Coding System (HCPCS) codes listed, are provided for informational purposes only. The codes reflect our interpretation of CPT/HCPCS coding requirements based upon AMA guidelines published annually. CPT/HCPCS codes are provided only as guidance to assist clients with billing. Baylor Genetics strongly recommends that clients confirm CPT/HCPCS codes with their Medicare Administrative Contractor (MAC) or other payer being billed, as requirements may differ. CPT coding is the sole responsibility of the billing party. Baylor Genetics assumes no responsibility for billing errors due to reliance on the CPT codes listed. Please direct any questions regarding CPT coding to the payer being billed.


Phenylalanine Determination - Blood Spot
Test Information: This test provides quantitative analysis of Tyrosine and Phenylalanine in Plasma.

This test is useful for the diagnosis and management of patients with PKU.
Test Details
Test Code: 4120
Technical Information
Methodology: HPLC Amino Acid Analyzer
References Values or Ranges: Normal Range for:
Phenylalanine: 30 - 86 micromoles/L
Tyrosine: 41 micromoles/L
Sample & Shipping Information
Test Requisition: Phenylalanine Determination - Blood Spot
Specimen Type: Blood Spot
Requirements: Dried blood spot specimens should be collected by carefully applying a few drops of blood, freshly drawn by finger stick with a lancet from children or adults, or by heel stick with a lancet from infants, onto specially manufactured absorbent specimen collection (filter) paper. The blood should be allowed to thoroughly saturate the paper and air dried for a minimum of 3 hours. Caked or clotted specimens are not acceptable and should not be shipped. Clearly label all samples with patient name, date of birth, and date of sample collection. Samples not clearly labeled will not be accepted for analysis.

Shipping Conditions: Ship at room temperature in an insulated container by overnight courier to arrive within 36 hours of collection. Do not heat or freeze.

Turn Around Time: 8 days
Billing Information
List Price: *For Insurance or Institutional Prices, please call.
CPT Codes: 84030 x 1, 84510 x 1


Return to test index