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Test Code ANAS Alpha-N-Acetylglucosaminidase, Serum

Reporting Name

Alpha-N-Acetylglucosaminidase, S

Useful For

Diagnosis of Sanfilippo syndrome type B (mucopolysaccharidoses type IIIB)


This test is not suitable for carrier detection.

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Specimen Type


Specimen Required

Collection Container/Tube:

Preferred: Red top

Acceptable: Serum gel

Submission Container/Tube: Plastic vial

Specimen Volume: 1 mL

Specimen Minimum Volume

0.8 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Serum Frozen 365 days

Reference Values

0.09-0.58 U/L

Day(s) and Time(s) Performed


Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
ANAS Alpha-N-Acetylglucosaminidase, S 1837-4


Result ID Test Result Name Result LOINC Value
50564 Specimen 31208-2
50565 Specimen ID 57723-9
50566 Source 31208-2
50567 Order Date 82785-7
50568 Reason For Referral 42349-1
50569 Method 49549-9
50577 Alpha-N-Acetylglucosaminidase, S 1837-4
50570 Interpretation 59462-2
50571 Amendment 48767-8
50572 Reviewed By 18771-6
50573 Release Date 82772-5

Reject Due To

Gross hemolysis OK
Gross lipemia OK
Gross icterus OK

Method Name



1. New York Clients-Informed consent is required. Document on the request form or electronic order that a copy is on file. The following documents are available in Special Instructions:

-Informed Consent for Genetic Testing (T576)

-Informed Consent for Genetic Testing-Spanish (T826)

2. Biochemical Genetics Patient Information (T602) in Special Instructions

3. If not ordering electronically, complete, print, and send an Inborn Errors of Metabolism Test Request (T798) with the specimen.

Testing Algorithm

See Lysosomal Storage Disorders Diagnostic Algorithm, Part 1 in Special Instructions.