Ordering RecommendationRecommendations when to order or not order the test. May include related or preferred tests.
Recommended test for suspected HNPP, appropriate first-tier test for suspected CMT1 or CMT1A; does not detect sequence variants. Recommended test if there is a known familial PMP22 deletion or duplication previously identified in a family member. A copy of the family member’s test result documenting the known familial variant is required.
MnemonicUnique test identifier.
CMT DD
MethodologyProcess(es) used to perform the test.
Multiplex Ligation-dependent Probe Amplification
PerformedDays of the week the test is performed.
Varies
ReportedExpected turnaround time for a result, beginning when ARUP has received the specimen.
Within 14 days
New York DOH Approval StatusIndicates test has been approved by the New York State Department of Health.
Specimens from New York clients will be sent out to a New York DOH approved laboratory, if possible.
Specimen Required
Patient Preparation
Collect
Lavender (EDTA), pink (K2EDTA), or yellow (ACD Solution A or B).
Reference IntervalNormal range/expected value(s) for a specific disease state. May also include abnormal ranges.
By Report
Interpretive DataBackground information for test. May include disease information, patient result explanation, recommendations, details of testing, associated diseases, explanation of possible patient results.
Refer to report.
Compliance Category
Laboratory Developed Test (LDT)
NoteAdditional information related to the test.
Hotline History
N/A
CPT CodesThe American Medical Association Current Procedural Terminology (CPT) codes published in ARUP's Laboratory Test Directory are provided for informational purposes only. The codes reflect our interpretation of CPT coding requirements based upon AMA guidelines published annually. CPT codes are provided only as guidance to assist clients with billing. ARUP strongly recommends that clients confirm CPT codes with their Medicare administrative contractor, as requirements may differ. CPT coding is the sole responsibility of the billing party. ARUP Laboratories assumes no responsibility for billing errors due to reliance on the CPT codes published.
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
AliasesOther names that describe the test. Synonyms.
Charcot-Marie-Tooth
CMT
Hereditary Neuropathy
Hereditary Neuropathy with liability to Pressure Palsies (HNPP)
Charcot-Marie-Tooth Type 1A (CMT1A)/Hereditary Neuropathy with Liability to Pressure Palsies (HNPP), PMP22 Deletion/Duplication
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