The following condition is not associated with an increased anion-gap type of metabolic acidosis
Ref: Harrison’s 18/e p369, 17/e p292
 
In COPD blood pH is usually maintained within normal range in spite of increased PaCO2 because of renal compensation which leads to retention of bicarbonates
Shock
Ingestion of ante-freeze
Diabetic ketoacidosis
COPD