| 11820-8 | Fetal Head Diameter.biparietal US |
| 33151-2 | Fetal Head Diameter.biparietal estimated from gestational age (method of australian society of ultrasound medicine 2000 (us)) |
| 33153-8 | Fetal Head Diameter.biparietal estimated from gestational age (method of jeanty 1982 (us)) |
| 33154-6 | Fetal Head Diameter.biparietal estimated from gestational age (method of merz 1988 (us)) |
| 33155-3 | Fetal Head Diameter.biparietal estimated from gestational age (method of rempen 1991 (us)) |
| 33156-1 | Fetal Head Diameter.biparietal estimated from gestational age (method of shinozuka 1996 (us)) |
| 33198-3 | Fetal Head Diameter.biparietal estimated from gestational age (method of hadlock 1984 (us)) |
| 95940-3 | Fetal Head Diameter.biparietal percentile per estimated gestational age |