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Test Code ACE Angiotensin Converting Enzyme, Serum

Additional Codes

Epic Ordering Code LAB179
NBS code LBC03841
Service code 36942

Reporting Name

Angiotensin Converting Enzyme, S

Specimen Type

Serum


Necessary Information


The use of angiotensin converting enzyme (ACE)-inhibiting antihypertensive drugs will cause decreased ACE values. Patients taking ACE inhibitors, such as captopril and enalapril, will have extremely low or unmeasurable ACE activity. Indicate on the request form if the patient is on ACE inhibitors.



Specimen Required


Collection Container/Tube:

Preferred: Serum gel

Acceptable: Red top

Submission Container/Tube: Plastic vial

Specimen Volume: 0.5 mL

Collection Instructions: Centrifuge and aliquot serum into a plastic vial


National University Hospital-Singapore Note:

NUH Outreach Laboratories:
Specimen Requirements
Submit only one of the following:
Preferred: Gold Top
Acceptable: Red Top
Processing Requirements
Centrifuge and aliquot serum into a plastic vial.
Specimen type: Serum
Volume: 0.5 mL
Storage/transport requirements: Refrigerated

Forms

If not ordering electronically, complete, print, and send 1 of the following forms with the specimen:

-General Request (T239)

-Cardiovascular Test Request (T724)

Specimen Minimum Volume

0.5 mL

Specimen Stability Information

Specimen Type Temperature Time
Serum Refrigerated (preferred) 7 days
  Frozen  180 days
  Ambient  24 hours

Reject Due To

Gross hemolysis Reject
Gross lipemia Reject
Gross icterus Reject

Method Name

Spectrophotometry (SP)

Day(s) Performed

Monday through Friday

Report Available

1 to 3 days
National University Hospital-Singapore Note:

Please note that this is a referral test requiring transport to the external testing facility and an additional 3-5 days is required.

Reference Values

≥18 years: 16-85 U/L

0-17 years: Angiotensin converting enzyme activity may be 20-50% higher in healthy children compared to healthy adults.

 

For SI unit Reference Values, see https://www.mayocliniclabs.com/order-tests/si-unit-conversion.html

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Useful For

Evaluation of patients with suspected sarcoidosis

CPT Code Information

82164

LOINC Code Information

Test ID Test Order Name Order LOINC Value
ACE Angiotensin Converting Enzyme, S 2742-5

 

Result ID Test Result Name Result LOINC Value
ACE Angiotensin Converting Enzyme, S 2742-5

Secondary ID

603622

Test Classification

This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.
National University Hospital-Singapore Additional Information:

Last updated 12/06/2026