ICD-10-CM 2027
ICD-10 code for glucose tolerance abnormal
From the official ICD-10-CM alphabetic index entry “Abnormal, abnormality, abnormalities › glucose tolerance (test) (non-fasting)”. Page updated September 29, 2026.
About coding glucose tolerance abnormal
The ICD-10-CM code for glucose tolerance abnormal is R73.09 (Other abnormal glucose).
Within R73.0, choose R73.09 (Other abnormal glucose) only when documentation doesn't support a more specific option: impaired fasting glucose (R73.01), impaired glucose tolerance (oral) (R73.02) and Prediabetes (R73.03).
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 glucose tolerance abnormal ICD-10 codes
What is the ICD-10 code for glucose tolerance abnormal?
- R73.09 — Other abnormal glucose.
Is R73.09 billable?
- Yes. R73.09 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can R73.09 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict R73.09 as a principal diagnosis.
Is R73.09 a CC or MCC?
- No. R73.09 is neither a CC nor an MCC under MS-DRG v44.0.