Calcium

General Information

Lab Name

Calcium

Lab Code

CA

Epic Name

Calcium

Interpretation

Method

Spectrophotometric

Reference Ranges

(individual methods listed below)

Default Method

Units: mg/dL
Female Male Unknown
AgeRange AgeRange AgeRange
0-8.9-10.2 0-8.9-10.2 0-8.9-10.2

Effective date: 03/01/2015

FH3 COBAS PUR 1 [F3PUR1]

Units: mg/dL
Female Male Unknown
AgeRange AgeRange AgeRange
0-8.8-10.2 0-8.8-10.2

Effective date: 12/23/2025

Guidelines

Ordering & Collection

Specimen Type

Blood

Collection

HMC and UWMC Onsite Locations

  • Preferred: 4 mL blood in LIME GREEN PST tube
  • Also Acceptable: 4 mL blood in ORANGE RST, GOLD SST, RED TOP or GREEN TOP tube
  • Pediatric: 1 Full LIME GREEN MICROTAINER
  • Unacceptable: GRAY TOP

Offsite Clinic or Other Locations

  • Preferred: 4 mL blood in GOLD SST tube
  • Also Acceptable: 4 mL blood in ORANGE RST or LIME GREEN PST, RED TOP or GREEN TOP tube
  • Pediatric: 1 Full LIME GREEN MICROTAINER
  • Unacceptable: GRAY TOP

Handling Instructions

Note: Calcium cannot be added on to a specimen more than 16 hours after it has already gone through the automation line and stored.

Quantity

requested: 1 mL serum/plasma
minimum: 0.3 mL serum/plasma

Processing

Refrigerate serum/plasma

Sample stability 16 hours

Performance

LIS Dept Code

Chemistry, Automated Panels (CHA)

Performing Location(s)

HMC Chemistry, Automated
206-520-4600

325 9th Ave, Rm # GWH-47, Seattle, WA 98104-2420
UW-NW Main Lab
206-668-1344

UW Medical Center – Northwest
1550 N 115th Street, A200
Seattle, WA 98133
UW-MT Chemistry, Automated
206-520-4600

Clinical Lab, Room NW220,
University of Washington Medical Center,
1959 NE Pacific street, Seattle, WA 98195
FHCC Fred Hutch Alliance Lab
206-606-1088

825 Eastlake Ave, Seattle, WA 98109

Fax: 206-606-2027
Hours of Operation: 6:00 a.m. - 10:00 p.m.

Includes satellite labs:
• SAIM - Sloan Clinic 1, 6th Floor
• FHH3 - Sloan Clinic 2, 3rd Floor
• FHH4 - Sloan Clinic 2, 4th Floor
FHCC Fred Hutch Community Lab, Evergreen Campus
425-441-2640

10240 NE 128th St
Kirkland, WA 98034

Fax: 425-441-2707
Hours of Operation: 7:30 a.m. - 5:00 p.m.
FHCC FHCC Peninsula Laboratory

19917 7th Ave NE Ste 100, Poulsbo, WA 98370-6555

Phone: 360-842-5116
Fax: 360-842-5150
Hours of Operation: 8:00 a.m. - 5:00 p.m.

Frequency

Daily

Available STAT?

Yes

Billing & Coding

CPT codes

82310

LOINC

17861-6

Interfaced Order Code

UOW1609

Interfaced Result Code

UOW1609