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

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: 4260
Special Notes: We recommend that Plasma (#4130) and Urine Creatine and Guanidinoacetate Determination be sent together and be analyzed simultaneously 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: 0-6 yr, 20-900 mmoles/mole creatinine; 7 yr - Adult, 12 - 500 mmoles/mole creatinine
Guanidinoacetate: 0-6 yr, 22 - 123 mmoles/mole creatinine: 7 yr - Adult, 24-112 mmoles/mole creatinine
Sample & Shipping Information
Test Requisition: Biochemical
Specimen Type: Urine
Requirements: Send 2-4 cc of a random urine. Do not add preservatives. Store the specimen frozen at -20C.
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, 82570x1, 83789x1


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