ICD-10-CM 2027
ICD-10 code for hyperglycemia
Confirmed by the official ICD-10-CM index entry “hyperglycemia, hyperglycemic (transient)”. Page updated September 29, 2026.
About coding hyperglycemia
The ICD-10-CM code for hyperglycemia is R73.9 (Hyperglycemia, unspecified).
It is also searched as high blood sugar.
Within R73, choose R73.9 (Hyperglycemia, unspecified) only when documentation doesn't support a more specific option: abnormal glucose (R73.0).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 640 (Miscellaneous Disorders of Nutrition, Metabolism, Fluids and Electrolytes with MCC, relative weight 1.3395) and DRG 641 (Miscellaneous Disorders of Nutrition, Metabolism, Fluids and Electrolytes without MCC, relative weight 0.7865), in MDC 10 (Endocrine, Nutritional and Metabolic Diseases and Disorders), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about hyperglycemia ICD-10 codes
What is the ICD-10 code for hyperglycemia?
- R73.9 — Hyperglycemia, unspecified.
Is R73.9 billable?
- Yes. R73.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can R73.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict R73.9 as a principal diagnosis.
Is R73.9 a CC or MCC?
- No. R73.9 is neither a CC nor an MCC under MS-DRG v44.0.