Differences between the ionized calcium result and the ionized calcium normalized to pH 7.4 are due to the specimen having a pH significantly different from pH 7.4. Specimen pH may be artificially decreased due to delayed processing and may be increased when the specimen is exposed to air. Due to these factors, it is recommended that the ionized calcium normalized to pH 7.4 be interpreted with caution and only used when the clinician has knowledge of the patient's acid/base status. Accurate determination of in vivo pH is best determined by arterial blood gas testing.
Reference Interval
Adult
Female
Male
Critical High
Critical Low
Ionized Calcium, Whole Blood (mg/dL)
Corrected (calculation at pH 7.4)
4.8 - 5.2
4.8 - 5.2
≥ 6.3
≤ 3.1
CPT Codes
82330
LOINC Mapping
38230-9
Order Type (Individual or Group)
G
Group Test Information
Result Test ID
Reportable
Result Test Name
Result Type
Type (Alpha or Numeric)
BICAU
Y
ICA UNCORR,WB
I
N
BICAC
Y
ICA @7.4,WB
I
N
CPT Codes
82330
LOINC Mapping
38230-9
Pricing
Refer to Lab Account Manager. email: labservicesoutreach@urmc.rochester.edu
Specimen Requirements
Collect
Full green top tube (Sodium Heparin or Lithium Heparin) or heparinized syringe FFT: Lithium heparin non-gel tube or heparinized syringe
Differences between the ionized calcium result and the ionized calcium normalized to pH 7.4 are due to the specimen having a pH significantly different from pH 7.4. Specimen pH may be artificially decreased due to delayed processing and may be increased when the specimen is exposed to air. Due to these factors, it is recommended that the ionized calcium normalized to pH 7.4 be interpreted with caution and only used when the clinician has knowledge of the patient's acid/base status. Accurate determination of in vivo pH is best determined by arterial blood gas testing.
Result Interpretation
Reference Interval
Adult
Female
Male
Critical High
Critical Low
Ionized Calcium, Whole Blood (mg/dL)
Corrected (calculation at pH 7.4)
4.8 - 5.2
4.8 - 5.2
≥ 6.3
≤ 3.1
Coding
CPT Codes
82330
LOINC Mapping
38230-9
URM Labs Internal
Test Build
Order Type (Individual or Group)
G
Group Test Information
Result Test ID
Reportable
Result Test Name
Result Type
Type (Alpha or Numeric)
BICAU
Y
ICA UNCORR,WB
I
N
BICAC
Y
ICA @7.4,WB
I
N
CPT Codes
82330
LOINC Mapping
38230-9
Pricing
Refer to Lab Account Manager. email: labservicesoutreach@urmc.rochester.edu
