Miscellaneous pH

Test Code

CPT Codes

Preferred Specimen

Body fluid specimen, including but not limited to: Cerebrospinal Fluid, pleural fluid, pericardial fluid, peritoneal fluid, or synovial fluid. Note fluid type in order comments or on patient specimen label.

Minimum Volume
1 mL


Collect body fluid in a body fluid collection bag or other sterile container and transport to lab. Refrigerate if transport will be delayed. Note fluid type in order comments or on patient specimen label.

This test is for pH measurement on Body Fluids.  For Venous pH measurement, order VPH.  For Urine pH measurement, order UPH.

Transport Container

Body fluid collection bag or sterile container

Transport Temperature
Room Temperature or Refrigeration

Specimen Stability
Room Temperature - 4 hours; Refrigerated - 24 hours

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Gross viscosity; clotted specimen


Setup Schedule

Daily upon receipt

Report Available
Upon completion of analysis

Gross viscosity may interfere with testing. Clotted samples cannot be used.

Clinical Significance

The pH value is a measure of hydrogen ion concentration. A variety of disease processes can alter pH values. Determining the pH value of a body fluid may help characterize the nature of the fluid.

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.