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Genetic Labs

Houston, Texas

Genetic Laboratory
Baylor Genetics Laboratories
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Medical Genetics Test Details

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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.


Creatine and Guanidinoacetate Determination - Plasma
Test Information: This test provides quantitative analysis of Creatine and Guanidinoacetate in Plasma.

The test is useful for the evaluation of patients suspected of having disorders of Creatine Transport and Synthesis, e.g. GAMT and AGAT Deficiency.
Test Details
Test Code: 4130
Special Notes: We recommend that both Plasma and Urine (#4260) be sent to rule out disorders of Creatine Transport and Synthesis.
Technical Information
Methodology: Tandem Mass Spectroscopy
Test Type: Analyte Analysis
References Values or Ranges: Normal Ranges for:
Creatine: 0-2 yr, 28-102 micromoles/L; 3 yr -adult, 20-110 micromoles/L
Guanidinoacetate: 0-2 yr, 0.3 - 1.6 micromoles/L; 3 yr -adult, 0.3 - 2.1 micromoles/L
Sample & Shipping Information
Test Requisition: Biochemical
Specimen Type: Plasma
Requirements: Draw blood in a Sodium Heparin (green-top) tube(s) and separate as soon as possible. Send 1-2 cc of plasma. Store the specimen frozen at -20C. Specimen may be stored frozen for up to 7 days.
Shipping Conditions: Ship frozen on 3-5 lbs of dry ice in an insulated container by overnight courier.

Turn Around Time: 10 days
Billing Information
List Price: *For Insurance or Institutional Prices, please call.
CPT Codes: 82540x1, 82542x1, 83789x1


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