Measurement
- 4A00 - Central Nervous
- 4A01 - Peripheral Nervous
- 4A02 - Cardiac
- 4A03 - Arterial
- 4A04 - Venous
- 4A05 - Circulatory
- 4A06 - Lymphatic
- 4A07 - Visual
- 4A08 - Olfactory
- 4A09 - Respiratory
- 4A0B - Gastrointestinal
- 4A0C - Biliary
- 4A0D - Urinary
- 4A0F - Musculoskeletal
- 4A0H - Products of Conception, Cardiac
- 4A0J - Products of Conception, Nervous
- 4A0Z - None