EPIC Code

LAB90

HGB A1C

 

Performing Lab

UCHealth University of Colorado Hospital Clinical Laboratory - Core Laboratory
UCHealth Cherry Creek Medical Center Laboratory

Collect

One 4 mL Purple top tube (EDTA).

Unacceptable Conditions

Sample not properly identified; incorrect container; insufficient sample volume; centrifuged sample.

Storage/Transport Temperature

Internal: Deliver to lab immediately.
Offsite: Do not centrifuge. Send at 2-8 degrees C.

Performed

Daily

Stability (from collection to initiation)

University of Colorado Hospital Clinicl Laboratory:

  • Ambient, 24 hours
  • Refrigerated, 7 days
  • Frozen, 12 months

Cherry Creek Medical Center Laboratory:

  • Ambient, 3 days
  • Refrigerated, 3 days
  • Frozen, not acceptable

Remarks

Any A1C order that is placed within 7 days of a prior A1C is considered a duplicate order and will be cancelled. Due to the lifespan of red blood cells, meaningful changes in A1C results do not occur in less than 7 days.

When ordered in Epic, a warning will appear when a repeat A1c is requested within the life span of red blood cells (approximately 120 days).  Results within this timeframe may not reflect changes in the average blood glucose.

Notes

Specimens with a HgF greater than 10.0% will be sent out to a referral lab for total glycosylated hemoglobin testing.

Performed

Daily

Methodology

University of Colorado Hospital Clinical Laboratory:

  • Ion-exchange High Performance Liquid Chromatography


Cherry Creek Medical Center Clinical Laboratory:

  • Immunoturbidimetric

Reported

Same day

Synonyms

  • LAB90
  • GLYCOSYLATED HEMOGLOBIN
  • HGB A1C
  • CCMC LAB90

EPIC Code

LAB90

HGB A1C

 

Reference Interval

4.0 - 5.6%.

Interpretive Data

Interpret with caution in the context of hemoglobin variants, thalassemias, red blood cell transfusions, iron replacement therapy, chronic renal failure, and conditions with reduced erythrocyte survival.
The American Diabetes Association endorses using A1C >6.4% as a criteria for diagnosing diabetes and suggests that patients with values between 5.7%-6.4% are at increased risk for diabetes. Maintaining A1C levels at or below 7.0% has been shown to reduce the risk of long term diabetic complications.
Estimated Average Glucose by ADAG/ADA Calculation.

CPT Codes

83036

Collection

EPIC Code

LAB90

HGB A1C

 

Performing Lab

UCHealth University of Colorado Hospital Clinical Laboratory - Core Laboratory
UCHealth Cherry Creek Medical Center Laboratory

Collect

One 4 mL Purple top tube (EDTA).

Unacceptable Conditions

Sample not properly identified; incorrect container; insufficient sample volume; centrifuged sample.

Storage/Transport Temperature

Internal: Deliver to lab immediately.
Offsite: Do not centrifuge. Send at 2-8 degrees C.

Performed

Daily

Stability (from collection to initiation)

University of Colorado Hospital Clinicl Laboratory:

  • Ambient, 24 hours
  • Refrigerated, 7 days
  • Frozen, 12 months

Cherry Creek Medical Center Laboratory:

  • Ambient, 3 days
  • Refrigerated, 3 days
  • Frozen, not acceptable

Remarks

Any A1C order that is placed within 7 days of a prior A1C is considered a duplicate order and will be cancelled. Due to the lifespan of red blood cells, meaningful changes in A1C results do not occur in less than 7 days.

When ordered in Epic, a warning will appear when a repeat A1c is requested within the life span of red blood cells (approximately 120 days).  Results within this timeframe may not reflect changes in the average blood glucose.

Notes

Specimens with a HgF greater than 10.0% will be sent out to a referral lab for total glycosylated hemoglobin testing.

Ordering

Performed

Daily

Methodology

University of Colorado Hospital Clinical Laboratory:

  • Ion-exchange High Performance Liquid Chromatography


Cherry Creek Medical Center Clinical Laboratory:

  • Immunoturbidimetric

Reported

Same day

Synonyms

  • LAB90
  • GLYCOSYLATED HEMOGLOBIN
  • HGB A1C
  • CCMC LAB90

EPIC Code

LAB90

HGB A1C

 

Result Interpretation

Reference Interval

4.0 - 5.6%.

Interpretive Data

Interpret with caution in the context of hemoglobin variants, thalassemias, red blood cell transfusions, iron replacement therapy, chronic renal failure, and conditions with reduced erythrocyte survival.
The American Diabetes Association endorses using A1C >6.4% as a criteria for diagnosing diabetes and suggests that patients with values between 5.7%-6.4% are at increased risk for diabetes. Maintaining A1C levels at or below 7.0% has been shown to reduce the risk of long term diabetic complications.
Estimated Average Glucose by ADAG/ADA Calculation.

Administrative

CPT Codes

83036