Understand glucose intolerance, including prediabetes, impaired glucose tolerance, and impaired fasting glucose. Learn about diagnostic criteria, A1C levels, ICD-10 codes (R73.03, R73.09), clinical documentation requirements, and blood glucose testing for accurate medical coding and billing. Find information on managing glucose intolerance through lifestyle changes, medication, and monitoring.
Also known as
Glucose intolerance
Abnormal blood sugar regulation, not meeting criteria for diabetes.
Drug or chemical induced diabetes mellitus
Diabetes caused by medications or other substances, sometimes reversible.
Diabetes mellitus in pregnancy
High blood sugar during pregnancy, affecting mother and baby.
Follow this step-by-step guide to choose the correct ICD-10 code.
Is the glucose intolerance associated with pregnancy?
When to use each related code
| Description |
|---|
| Glucose intolerance |
| Prediabetes |
| Impaired fasting glucose |
Coding glucose intolerance without specifying drug-induced, gestational, or other types leads to inaccurate data and potential underpayment.
Confusing prediabetes with impaired glucose tolerance (IGT) can cause incorrect coding and impact diabetes management tracking.
Missing lab results or clinical documentation to support IGT diagnosis poses audit risks and claim denials for insufficient evidence.
Patient presents with signs and symptoms suggestive of glucose intolerance, including polyuria, polydipsia, and occasional blurred vision. The patient reports increased thirst and frequent urination, particularly at night. No polyphagia is reported at this time. Family history is positive for type 2 diabetes mellitus. Physical examination reveals no significant abnormalities. Fasting plasma glucose of 115 mgdL was noted on [date]. A subsequent 2-hour oral glucose tolerance test (OGTT) performed on [date] revealed a glucose level of 155 mgdL, confirming the diagnosis of impaired glucose tolerance (IGT), also known as prediabetes. Assessment includes impaired glucose homeostasis, elevated blood sugar, and risk factors for developing type 2 diabetes. The patient was educated on lifestyle modifications, including dietary changes focusing on a low glycemic index diet, portion control, regular exercise, and weight management strategies. The importance of blood glucose monitoring and regular follow-up was emphasized. The patient was advised to return for repeat OGTT testing in three months to monitor glycemic control and assess the effectiveness of lifestyle interventions. Differential diagnoses considered included type 2 diabetes mellitus, gestational diabetes (not applicable in this case), and stress-induced hyperglycemia. ICD-10 code R73.03 (Impaired glucose tolerance) applies. CPT codes for OGTT (82951) and subsequent office visits (99213 or 99214, depending on complexity) will be billed. Patient education materials regarding prediabetes management and diabetes prevention were provided.