Potassium

Interpretation

Guidelines

• Transition of Chemistry and Immunoassay Platforms from Beckman to Roche

Method

Ion Selective Electrode (ISE)

Reference Ranges

(individual methods listed below)

Default Method

Units: mEq/L

Female		Male		Unknown
Age	Range	Age	Range	Age	Range
0-	3.6-5.2	0-	3.6-5.2	0-	3.6-5.2

Effective date: 03/01/2015

FHEV COBAS PUR 1 [EVPUR1]

Units: mEq/L

Female		Male		Unknown
Age	Range	Age	Range	Age	Range
0-	3.5-5.1	0-	3.5-5.1

Effective date: 02/10/2026

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

Quantity

Requested: 1 mL serum/plasma
Minimum: 0.1 mL serum/plasma

Processing

Receiving Instructions

Refrigerate serum/plasma.

Misc Sendout

Performance

Lab Department

Chemistry, Automated Panels(CHA)

Frequency

Daily

Available STAT?

Yes

Performing Location(s)

FHCC	Alliance Lab, Immunotherapy Lab
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.
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.
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 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	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.
HMC	Chemistry, Automated 206-520-4600 325 9th Ave, Rm # GWH-47, Seattle, WA 98104-2420
UW-MT	Chemistry, Automated 206-520-4600 Clinical Lab, Room NW220, University of Washington Medical Center, 1959 NE Pacific street, Seattle, WA 98195
UW-NW	Main Lab 206-668-1344 UW Medical Center – Northwest 1550 N 115th Street, A200 Seattle, WA 98133

Billing & Coding

CPT Codes

84132

LOINC

2823-3

Interfaced Result Code

UOW3831