How is Diabetes mellitus diagnosed?

Answered by 1 Apollo Doctors

Dr Ibrahim Salah

General Practitioner

MBBS
2+ Yrs

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Fasting blood sugar of 126 mg/dl or more, post prandial blood sugar of 200 or more with glycated hemoglobin of 6.5% or more.

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Consult a Endocrinologist

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Answered 04/07/2025

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Understanding Diabetes Mellitus Diagnosis
- Diagnosis aims to identify diabetes early to prevent complications.
Common Diagnostic Tests
- Fasting Plasma Glucose (FPG) Test: Measures blood sugar after fasting.
- Oral Glucose Tolerance Test (OGTT): Assesses body's response to sugar.
- Glycated Hemoglobin (HbA1c) Test: Indicates average blood sugar over 3 months.
- Random Plasma Glucose Test: Checks blood sugar at any time.
Diagnostic Criteria
- FPG: ≥126 mg/dL indicates diabetes.
- OGTT: ≥200 mg/dL after 2 hours indicates diabetes.
- HbA1c: ≥6.5% indicates diabetes.
Additional Considerations
- Repeat testing may be needed for confirmation.
- Consult healthcare professionals for accurate diagnosis.
Related Medical Specialties
- Endocrinologists and general physicians manage diabetes care.
Patient Guidance
- Prepare by fasting if required and follow instructions for accurate results.

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