O13

O13 stands for:

• O13, ICD-10 code for gestational hypertension without significant proteinuria during pregnancy
• O13, FAA code for Haddock Field Airport in Erick, Oklahoma, United States
• O 13, a Dutch O 12 class submarine built between 1928 and 1931

This is a disambiguation page for differentiating between several terms identified with the same word.