ICD-10-CM 2027 diagnosis code
R73.02Impaired glucose tolerance (oral)
R73.02 is a valid, billable ICD-10-CM code for impaired glucose tolerance (oral). It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About R73.02
R73.02 is the ICD-10-CM diagnosis code for impaired glucose tolerance (oral). It belongs to category R73 (elevated blood glucose level), block R70-R79 (abnormal findings on examination of blood, without diagnosis) and chapter 18 (symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.
Within R73.0 (abnormal glucose), R73.02 is specifically for impaired glucose tolerance (oral). Related codes cover impaired fasting glucose (R73.01), Prediabetes (R73.03) and other abnormal glucose (R73.09).
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.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Before ICD-10, this condition was coded in ICD-9-CM as 790.22 (impaired glucose tolerance test (oral)).
Coding notes
- Elevated glucose tolerance
Notes that apply from higher levels
Instructions written at a parent level also apply to R73.02.
› From R73.0 Abnormal glucose
Broader instructions also apply from R70-R79 Abnormal findings on examination of blood, without diagnosis and Chapter 18: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified.
Alphabetic index entries
2 entriesTerms in the official ICD-10-CM index that lead to R73.02.
MS-DRG v44.0 grouping
All DRGs →Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.
MDC 10 · Endocrine, Nutritional and Metabolic Diseases and Disorders
ICD-9-CM equivalent
Converter →- 790.22Impaired glucose tolerance test (oral)exact
From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about R73.02
Is R73.02 billable?
- Yes. R73.02 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can R73.02 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict R73.02 as a principal diagnosis.
Is R73.02 a CC or MCC?
- No. R73.02 is neither a CC nor an MCC under MS-DRG v44.0.
What DRG does R73.02 group to?
- R73.02 is used in the MS-DRG v44.0 logic for MS-DRG 640 (Miscellaneous Disorders of Nutrition, Metabolism, Fluids and Electrolytes with MCC) and MS-DRG 641 (Miscellaneous Disorders of Nutrition, Metabolism, Fluids and Electrolytes without MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.
What is the ICD-9 code for R73.02?
- The CMS General Equivalence Mappings map R73.02 to ICD-9-CM 790.22.