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22296 Angiotensin Converting Enzyme, CSF (FACEC)

Angiotensin Converting Enzyme, CSF (FACEC)
Test Code: ACESFSO
Synonyms/Keywords

ACE (Angiotensin Converting Enzyme)

 C ACESFSO

Useful For

​Support diagnosis of neurosarcoidosis. May be used to evaluate treatment response.

Specimen Requirements
Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)
Pediatric Minimum Volume
(no repeat)
​CSF Sterile Plastic Tube​ 1.0 mL​ 0.5 mL​
Collection Processing Instructions

​Ship frozen

Note: Gadolinium contrast agents have been reported to inhibit ACE activity. Therefore, CSF containing gadolinium-based contrast agents should not be submitted to the laboratory for evaluation.

Specimen Stability Information
Specimen Type Temperature Time
CSF​ ​ Frozen (preferred)​ 180 days​
Refrigerated ​ 7 days​
Rejection Criteria
Specimens other than CSF
​Warm thawed samples (Cold thawed samples are okay)
Mild Hemolysis or ​Gross Hemolysis

​Xanthochromic samples (yellow color)

​CSF containing gadolinium-based contrast agents
Performing Laboratory Information
Performing Location Day(s) Test Performed Report Available Methodology/Instrumentation
Mayo Medical Laboratories who forwards to ARUP Laboratories 
Monday, Wednesday, Friday​
1 - 7 days
Quantitative Spectrophotometry​
Reference Lab
Test Information

This test was developed and its performance characteristics have been determined by ARUP Laboratories. The U.S. Food and Drug Administration has not approved or cleared this test; however, FDA clearance or approval is not currently required for clinical use. The results are not intended to be used as the sole means for clinical diagnosis or patient management decisions.​

Reference Range Information
0.0-2.5 U/L
Outreach CPTs
CPT Modifier
(if needed)
Quantity Description Comments
​82164
Synonyms/Keywords

ACE (Angiotensin Converting Enzyme)

 C ACESFSO

Ordering Applications
Ordering Application Description
​COM ​Angiotensin Converting Enzyme, CSF (FACEC)
​Cerner ​Angiotensin Converting Enzyme, CSF (FACEC)
If the ordering application you are looking for is not listed, contact your local laboratory for assistance.
Specimen Requirements
Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)
Pediatric Minimum Volume
(no repeat)
​CSF Sterile Plastic Tube​ 1.0 mL​ 0.5 mL​
Collection Processing

​Ship frozen

Note: Gadolinium contrast agents have been reported to inhibit ACE activity. Therefore, CSF containing gadolinium-based contrast agents should not be submitted to the laboratory for evaluation.

Specimen Stability Information
Specimen Type Temperature Time
CSF​ ​ Frozen (preferred)​ 180 days​
Refrigerated ​ 7 days​
Rejection Criteria
Specimens other than CSF
​Warm thawed samples (Cold thawed samples are okay)
Mild Hemolysis or ​Gross Hemolysis

​Xanthochromic samples (yellow color)

​CSF containing gadolinium-based contrast agents
Useful For

​Support diagnosis of neurosarcoidosis. May be used to evaluate treatment response.

Reference Range Information
0.0-2.5 U/L
For more information visit:
Performing Laboratory Information
Performing Location Day(s) Test Performed Report Available Methodology/Instrumentation
Mayo Medical Laboratories who forwards to ARUP Laboratories 
Monday, Wednesday, Friday​
1 - 7 days
Quantitative Spectrophotometry​
Reference Lab
For billing questions, see Contacts
Outreach CPTs
CPT Modifier
(if needed)
Quantity Description Comments
​82164
For most current information refer to the Marshfield Laboratory online reference manual.