Glycated haemoglobin (HbA1c) tests

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Coding system
SNOMED CT
Coding system release
unknown
Organisation
OpenSAFELY
Codelist ID
opensafely/glycated-haemoglobin-hba1c-tests
Version ID
2ab11f20
Versions

Description

A SNOMED CT codelist for patients receiving monitoring of glycated haemoglobin (HbA1c) tests.

Methodology

2 search strategies: 1: Use SNOMED codes for existing CTV3 codes in SRO notebooks (using Kahootz CTV3 browser) 2: Search for "haemoglobin A1c" and selecting any codes which related to total HbA1c monitoring and level, excluding any codes for other purposes, including reference ranges. Both the current IFCC mmol/mol and the previous percentage codes are included.

Whether codes relating to "monitoring" rather than "level" need to excluded is still to be determined.

Signed off by

  • Richard Croker, (April 21, 2021)
  • Brian MacKenna, (April 21, 2021)

Codelists are developed by a broad community of users for individual study purposes, which may or may not meet the needs of other studies. They should not be thought of as universal definitions of a particular condition.

We don't offer any guarantees about what they do or don't identify. Users should carefully check that any codelist meets their needs, and seek clinical input where appropriate.

code term
1003671000000109 Haemoglobin A1c level
144176003 Haemoglobin A1c level
166902009 Haemoglobin A1c level
313835008 Hemoglobin A1c measurement aligned to the Diabetes Control and Complications Trial
365845005 Hemoglobin A1C - diabetic control finding
371981000000106 Haemoglobin A1c measurement - International Federation of Clinical Chemistry and Laboratory Medicine standardised
43396009 Hemoglobin A1c measurement
491841000000105 Haemoglobin A1c level
567641000000108 Haemoglobin A1C - diabetic control NOS
999791000000106 Haemoglobin A1c level - International Federation of Clinical Chemistry and Laboratory Medicine standardised

Codes not in the full codelist are in faint grey.

This page shows the search terms that were used to build the codelist. Concepts that match the search terms, but which were excluded, are in faint grey.

1003671000000109

Included 2 out of 8 matching concepts.

Show matching concepts
  • Haemoglobin A1c (diagnostic reference range) (1010951000000100)
  • Haemoglobin A1c (monitoring ranges) (1010941000000103)
  • Haemoglobin A1c level (1003671000000109)
  • Haemoglobin A1c level (Diabetes Control and Complications Trial aligned) (1019431000000105)
  • Haemoglobin A1c level (diagnostic reference range) - International Federation of Clinical Chemistry and Laboratory Medicine standardised (1049301000000100)
  • Haemoglobin A1c level (monitoring ranges) - International Federation of Clinical Chemistry and Laboratory Medicine standardised (1049321000000109)
  • Haemoglobin A1c level - International Federation of Clinical Chemistry and Laboratory Medicine standardised (999791000000106)
  • Substance concentration of haemoglobin A1c in blood (1107481000000106)

999791000000106

Included 1 out of 1 matching concepts.

Show matching concepts
  • Haemoglobin A1c level - International Federation of Clinical Chemistry and Laboratory Medicine standardised (999791000000106)

Haemoglobin A1c

Included 10 out of 43 matching concepts.

Show matching concepts
  • Calculation of estimated average glucose based on hemoglobin A1c (444257008)
  • Glucose measurement estimated from glycated hemoglobin (117346004)
  • Glycosylated hemoglobin A (33601001)
  • Haemoglobin A1C - diabetic control NOS (567641000000108)
  • Haemoglobin A1c (936141000000101)
  • Haemoglobin A1c (diagnostic reference range) (1010951000000100)
  • Haemoglobin A1c (diagnostic reference range) (936111000000102)
  • Haemoglobin A1c (diagnostic reference range) (936121000000108)
  • Haemoglobin A1c (diagnostic reference range) - International Federation of Clinical Chemistry and Laboratory Medicine standardised (955411000000102)
  • Haemoglobin A1c (diagnostic reference range) - International Federation of Clinical Chemistry and Laboratory Medicine standardised (1049311000000103)
  • Haemoglobin A1c (monitoring ranges) (1010941000000103)
  • Haemoglobin A1c (monitoring ranges) (936131000000105)
  • Haemoglobin A1c (monitoring ranges) - International Federation of Clinical Chemistry and Laboratory Medicine standardised (955421000000108)
  • Haemoglobin A1c (monitoring ranges) - International Federation of Clinical Chemistry and Laboratory Medicine standardised (1049331000000106)
  • Haemoglobin A1c level (1003671000000109)
  • Haemoglobin A1c level (166902009)
  • Haemoglobin A1c level (144176003)
  • Haemoglobin A1c level (491841000000105)
  • Haemoglobin A1c level (Diabetes Control and Complications Trial aligned) (1019431000000105)
  • Haemoglobin A1c level (diagnostic reference range) - International Federation of Clinical Chemistry and Laboratory Medicine standardised (1049301000000100)
  • Haemoglobin A1c level (monitoring ranges) - International Federation of Clinical Chemistry and Laboratory Medicine standardised (1049321000000109)
  • Haemoglobin A1c level - International Federation of Clinical Chemistry and Laboratory Medicine standardised (999791000000106)
  • Haemoglobin A1c measurement - International Federation of Clinical Chemistry and Laboratory Medicine standardised (371981000000106)
  • Haemoglobin A1c target - International Federation of Clinical Chemistry and Laboratory Medicine standardised (727931000000104)
  • Haemoglobin A1c target - International Federation of Clinical Chemistry and Laboratory Medicine standardised (727941000000108)
  • HbA>1c< (103232008)
  • Hemoglobin A1C - diabetic control finding (365845005)
  • Hemoglobin A1C - diabetic control interpretation (269823000)
  • Hemoglobin A1C test declined (9481000175103)
  • Hemoglobin A1C test not done (4501000175108)
  • Hemoglobin A1c above reference range (444751005)
  • Hemoglobin A1c between 7%-10% indicating borderline diabetic control (165680008)
  • Hemoglobin A1c greater than 10% indicating poor diabetic control (165681007)
  • Hemoglobin A1c less than 7% indicating good diabetic control (165679005)
  • Hemoglobin A1c measurement (43396009)
  • Hemoglobin A1c measurement aligned to the Diabetes Control and Complications Trial (313835008)
  • Hemoglobin A1c target (408591000)
  • Hemoglobin A1c target value using International Federation of Clinical Chemistry and Laboratory Medicine standardized method (446074002)
  • Ordinal level of hemoglobin A1c (443911005)
  • Provision of written information about diabetes and high haemoglobin A1c level (944581000000108)
  • Provision of written information about diabetes and high haemoglobin A1c level (944591000000105)
  • Provision of written information about diabetes and high hemoglobin A1c level (719943000)
  • Substance concentration of haemoglobin A1c in blood (1107481000000106)