Reference — Endocrine
Glycemic Targets Reference
Glucose goals, A1C targets, hospital glucose parameters, hypoglycemia thresholds, and critical values — the key numbers every nurse needs for diabetes management.
Educational use only. Glycemic targets are individualized by the provider and care team; use facility protocols and current orders for treatment decisions. This material supports nursing education and exam review. It is not medical advice and is not a substitute for clinical judgment, institutional policy, or medical direction. Always follow facility protocols and current provider orders.
Diagnostic Glucose Values
| Test | Normal | Prediabetes | Diabetes |
|---|---|---|---|
| Fasting plasma glucose | <100 mg/dL | 100–125 mg/dL | ≥126 mg/dL |
| 2-hr OGTT (75g) | <140 mg/dL | 140–199 mg/dL | ≥200 mg/dL |
| A1C | <5.7% | 5.7–6.4% | ≥6.5% |
| Random glucose (with symptoms) | — | — | ≥200 mg/dL + symptoms |
A1C Goals (Outpatient)
| Population | A1C Goal | Rationale |
|---|---|---|
| Most non-pregnant adults | <7.0% | Balances complication reduction with hypoglycemia risk |
| Younger adults, newly diagnosed, no hypoglycemia risk | <6.5% | More stringent if safely achievable |
| Elderly, multiple comorbidities, limited life expectancy | <8.0–8.5% | Less stringent to avoid hypoglycemia harms |
| Pregnant with pre-existing DM | <6.0–6.5% | Tight control during pregnancy; expert guidance required |
| Each 1% A1C reduction | ~30 mg/dL average glucose | Each 1% A1C = meaningful microvascular complication reduction |
A1C reflects average blood glucose over approximately 3 months. It does not capture glucose variability or hypoglycemia events.
Outpatient Glucose Targets
| Timing | Target (ADA) | Notes |
|---|---|---|
| Fasting / Pre-meal | 80–130 mg/dL | Check before first meal and before each meal on intensive regimens |
| 2-hour postprandial | <180 mg/dL | Measured 2 hours after first bite of meal |
| Bedtime | 100–140 mg/dL | Institution-specific; goal varies — generally avoid <100 at bedtime |
| 3 AM (overnight check) | >65 mg/dL | Check if nocturnal hypoglycemia suspected |
Hospital Glucose Targets
| Setting | Target Range | Notes |
|---|---|---|
| ICU (critical care) | 140–180 mg/dL (ADA/AACE) | Intensive control (<140) not recommended — increases hypoglycemia risk and mortality (NICE-SUGAR trial) |
| Non-ICU (general floor) | 100–180 mg/dL | ADA non-critically-ill goal; many facilities target 140–180; follow institutional protocol |
| Surgical patient (perioperative) | 140–180 mg/dL | Hyperglycemia impairs wound healing and immune function |
| DKA resolution threshold | <200 mg/dL + anion gap closed | Glucose alone is NOT the endpoint — anion gap must close |
| Parenteral/enteral nutrition patient | 140–180 mg/dL | Continuous feeding = continuous glucose monitoring needed |
Hypoglycemia Thresholds and Treatment
| Level | Glucose | Symptoms | Nursing Action |
|---|---|---|---|
| Alert threshold | <70 mg/dL | Shakiness, diaphoresis, tachycardia, hunger, anxiety | Rule of 15: give 15g fast-acting carbs → recheck in 15 min. Repeat if still <70. |
| Clinically significant | <54 mg/dL | Same as above + confusion, visual changes | 15g carbs + notify provider. More frequent monitoring. May require IV dextrose. |
| Severe hypoglycemia | Any level with LOC, seizure, inability to swallow | Unconscious, seizure, unable to cooperate | IV dextrose (D50W 25–50 mL) or glucagon IM/SQ if no IV access. Do NOT give oral glucose. |
| Hypoglycemia unawareness | Varies — may be <54 without symptoms | No symptoms despite critical glucose | More frequent monitoring; medical alert bracelet; continuous glucose monitor (CGM) discussion |
Rule of 15
Give 15g fast-acting carbohydrates → wait 15 minutes → recheck glucose. Repeat if still <70 mg/dL. Once glucose normalizes, follow with a complex carbohydrate + protein snack if next meal is >1 hour away.
15g carb sources: 4 oz (120 mL) orange juice or regular soda, 3–4 glucose tablets, 1 tablespoon sugar/honey, glucose gel packet.
Critical Glucose Values
| Value | Significance | Action |
|---|---|---|
| <40 mg/dL | Critical low — brain glucose deprivation | IV dextrose STAT; notify provider immediately; continuous monitoring |
| >500 mg/dL | Critical high — osmotic crisis risk | Notify provider immediately; assess for DKA/HHS; IV access; labs |
| >600 mg/dL | Possible HHS — extreme osmotic risk | Emergency assessment; IV fluids; full metabolic panel; ICU evaluation |
Related Resources
Standards & sources
Fact-checked Jun 20, 2026This page is written to align with American Diabetes Association (ADA) Standards of Care · American Association of Clinical Endocrinology (AACE). It is an educational summary, not a citation of any single document — always verify specific doses, values, and protocols against current guidelines and your facility policy. How we source content →