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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.


Carnitine Biosynthesis Panel - Urine
Urinary Carnitine Biosynthesis Panel | EPSILON-TRIMETHYLLYSINE HYDROXYLASE DEFICIENCY | TMLHED | AUTISM SUSCEPTIBILITY TO X-LINKED 6 | AUTSX6
Test Information: The test is useful for the evaluation of patients suspected of having disorders of Carnitine Biosynthesis, e.g. X-linked Trimethyllysine Hydroxylase (TMLHE) Deficiency.
Test Details
Test Code: 4135
Special Notes: This test can be performed on Plasma (#4145) and Cerebrospinal Fluid (CSF) (#4155).

NOTE: TMLHE Biochemical Analysis (test codes #4135, #4145 or #4155) should be performed prior to molecular analysis. Deletion/Duplication Analysis (test code #2513) should be performed prior to or concurrent with TMLHE Sequence Analysis (test code #2510). Deletion/duplication analysis analyzes for deletions involving exon 2 of the TMLHE gene which are the most common cause of TMLHE deficiency.
Technical Information
Methodology: Tandem Mass Spectroscopy
Test Type: Analyte Analysis
References Values or Ranges: Normal Ranges for:

Trimethyllysine: less than 2 yr, 4-14 mmoles/mole creatinine; 2 yr and above, 8-21 mmoles/mole creatinine

Gamma-Butyrobetaine: less than 2 yr, 0.03-0.8 mmoles/mole creatinine: 2 yr and above, 0-1.1 mmoles/mole creatinine

Carnitine: less than 2 yr, 1.7-16 mmoles/mole creatinine: 2 yr and above, 2-33 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: 22 days
Billing Information
List Price: *For Insurance or Institutional Prices, please call.
CPT Codes: 82542x1, 82570x1, 83789x1


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