| 11884-4 | Gestational age Estimated |
| 11885-1 | Gestational age Estimated from last menstrual period |
| 11886-9 | Gestational age Estimated from ovulation date |
| 11887-7 | Gestational age Estimated from selected delivery date |
| 11888-5 | Gestational age US composite estimate |
| 11889-3 | Gestational age estimated from Abdominal circumference on US |
| 11890-1 | Gestational age estimated from Abdominal circumference on US (campbell 1975 method) |
| 11891-9 | Gestational age estimated from Abdominal circumference on US (hadlock 1982 method) |
| 11892-7 | Gestational age estimated from Abdominal circumference on US (hadlock 1984 method) |
| 11893-5 | Gestational age estimated from Abdominal circumference on US (jeanty 1984 method) |
| 11894-3 | Gestational age estimated from area corrected Biparietal circumference (US) |
| 11895-0 | Gestational age estimated from Binocular distance on US |
| 11896-8 | Gestational age estimated from Binocular distance on US (jeanty 1984 method) |
| 11897-6 | Gestational age estimated from Biparietal circumference (US) |
| 11898-4 | Gestational age estimated from Biparietal diameter on US |
| 11899-2 | Gestational age estimated from Biparietal diameter on US (campbell 1975 method) |
| 11900-8 | Gestational age estimated from Biparietal diameter on US (doubilet 1993 method) |
| 11901-6 | Gestational age estimated from Biparietal diameter on US (hadlock 1982 method) |
| 11902-4 | Gestational age estimated from Biparietal diameter on US (hadlock 1984 method) |
| 11903-2 | Gestational age estimated from Biparietal diameter on US (hansmann 1985 method) |
| 11904-0 | Gestational age estimated from Biparietal diameter on US (hobbins 1983 method) |
| 11905-7 | Gestational age estimated from Biparietal diameter on US (jeanty 1984 method) |
| 11906-5 | Gestational age estimated from Biparietal diameter on US (kurtz 1980 method) |
| 11907-3 | Gestational age estimated from Biparietal diameter on US (sabbagha 1978 method) |
| 11908-1 | Gestational age estimated from Cerebellar diameter (method of goldstein 1987 (us)) |
| 11909-9 | Gestational age estimated from Crown rump length on US |
| 11910-7 | Gestational age estimated from Crown rump length on US (hadlock 1992 method) |
| 11911-5 | Gestational age estimated from Crown rump length on US (hansmann 1985 method) |
| 11912-3 | Gestational age estimated from Crown rump length on US (jeanty 1984 method) |
| 11913-1 | Gestational age estimated from Crown rump length on US (nelson 1981 method) |
| 11914-9 | Gestational age estimated from Crown rump length on US (robinson 1975 method) |
| 11915-6 | Gestational age estimated from Crown rump length on US (yeh 1988 method) |
| 11916-4 | Gestational age estimated from Fibula length (US) |
| 11917-2 | Gestational age estimated from Fibula length (method of jeanty 1984 (us)) |
| 11918-0 | Gestational age estimated from Fibula length (method of merz 1987 (us)) |
| 11919-8 | Gestational age estimated from Femur length on US |
| 11920-6 | Gestational age estimated from Femur length on US (hadlock 1984 method) |
| 11921-4 | Gestational age estimated from Femur length on US (hansmann 1985 method) |
| 11922-2 | Gestational age estimated from Femur length on US (hohler 1982 method) |
| 11923-0 | Gestational age estimated from Femur length on US (jeanty 1984 method) |
| 11924-8 | Gestational age estimated from Femur length on US (merz 1987 method) |
| 11925-5 | Gestational age estimated from Femur length on US (obrien 1982 method) |
| 11926-3 | Gestational age estimated from Foot length on US (mercer 1987 method) |
| 11927-1 | Gestational age estimated from Gestational sac diameter on US |
| 11928-9 | Gestational age estimated from Gestational sac diameter on US (hellman 1969 method) |
| 11929-7 | Gestational age estimated from Gestational sac diameter on US (rempen 1991 method) |
| 11930-5 | Gestational age estimated from Head circumference on US |
| 11931-3 | Gestational age estimated from Head circumference on US (hadlock 1982 method) |
| 11932-1 | Gestational age estimated from Head circumference on US (hadlock 1984 method) |
| 11933-9 | Gestational age estimated from Head circumference on US (hoffbauer 1979 method) |
| 11934-7 | Gestational age estimated from Head circumference on US (jeanty 1984 method) |
| 11935-4 | Gestational age estimated from Humerus length on US |
| 11936-2 | Gestational age estimated from Humerus length on US (jeanty 1984 method) |
| 11937-0 | Gestational age estimated from Humerus length on US (merz 1987 method) |
| 11938-8 | Gestational age estimated from Radius length (US) |
| 11939-6 | Gestational age estimated from Radius length (method of merz 1987 (us)) |
| 11940-4 | Gestational age estimated from Tibia length on US |
| 11941-2 | Gestational age estimated from Tibia length on US (jeanty 1984 method) |
| 11942-0 | Gestational age estimated from Tibia length on US (merz 1987 method) |
| 11943-8 | Gestational age estimated from Ulna length (US) |
| 11944-6 | Gestational age estimated from Ulna length (method of jeanty 1984 (us)) |
| 11945-3 | Gestational age estimated from Ulna length (method of merz 1987 (us)) |
| 18185-9 | Gestational age |
| 33072-0 | Gestational age estimated from Abdominal circumference on US (australian society of ultrasound medicine 2000 method) |
| 33073-8 | Gestational age estimated from Abdominal circumference on US (hansmann 1985 method) |
| 33074-6 | Gestational age estimated from Abdominal circumference on US (lessoway 1998 method) |
| 33075-3 | Gestational age estimated from Abdominal circumference on US (merz 1988 method) |
| 33076-1 | Gestational age estimated from Abdominal circumference on US (shinozuka 1996 method) |
| 33077-9 | Gestational age estimated from Anterior-posterior diameter of the abdomen (method of lessoway 1998 (us)) |
| 33078-7 | Gestational age estimated from AXT (method of shinozuka 1996 (us)) |
| 33079-5 | Gestational age estimated from Biparietal diameter on US (australian society of ultrasound medicine 1989 method) |
| 33080-3 | Gestational age estimated from Biparietal diameter on US (lessoway 1998 method) |
| 33081-1 | Gestational age estimated from Biparietal diameter on US (merz 1988 method) |
| 33082-9 | Gestational age estimated from Biparietal diameter on US (osaka 1989 method) |
| 33083-7 | Gestational age estimated from Biparietal diameter on US (rempen 1991 method) |
| 33084-5 | Gestational age estimated from Biparietal diameter on US (shinozuka 1996 method) |
| 33085-2 | Gestational age estimated from Biparietal diameter on US (tokyo 1986 method) |
| 33086-0 | Gestational age estimated from Outer-Inner Biparietal diameter on US (chitty 1997 method) |
| 33087-8 | Gestational age estimated from Outer-Outer Biparietal diameter on US (chitty 1997 method) |
| 33088-6 | Gestational age estimated from clavicle length (method of yarkoni 1985 (us)) |
| 33089-4 | Gestational age estimated from Crown rump length on US (australian society of ultrasound medicine 1991 method) |
| 33090-2 | Gestational age estimated from Crown rump length on US (australian society of ultrasound medicine 2000 method) |
| 33091-0 | Gestational age estimated from Crown rump length on US (daya 1993 method) |
| 33092-8 | Gestational age estimated from Crown rump length on US (jeanty 1982 method) |
| 33093-6 | Gestational age estimated from Crown rump length on US (osaka 1989 method) |
| 33094-4 | Gestational age estimated from Crown rump length on US (rempen 1991 method) |
| 33095-1 | Gestational age estimated from Crown rump length on US (shinozuka 1996 method) |
| 33096-9 | Gestational age estimated from Crown rump length on US (tokyo 1986 method) |
| 33097-7 | Gestational age estimated from Fibula length (method of jeanty 1983 (us)) |
| 33098-5 | Gestational age estimated from Femur length on US (chitty 1997 method) |
| 33099-3 | Gestational age estimated from Femur length on US (jeanty 1982 method) |
| 33100-9 | Gestational age estimated from Femur length on US (lessoway 1998 method) |
| 33101-7 | Gestational age estimated from Femur length on US (osaka 1989 method) |
| 33102-5 | Gestational age estimated from Femur length on US (shinozuka 1996 method) |
| 33103-3 | Gestational age estimated from Femur length on US (tokyo 1986 method) |
| 33104-1 | Gestational age estimated from Gestational sac diameter on US (daya 1991 method) |
| 33105-8 | Gestational age estimated from Gestational sac length on US (hansmann 1979 method) |
| 33106-6 | Gestational age estimated from Gestational sac diameter on US (hansmann 1982 method) |
| 33107-4 | Gestational age estimated from Gestational sac length on US (nyberg 1992 method) |
| 33108-2 | Gestational age estimated from Gestational sac diameter on US (tokyo 1986 method) |
| 33109-0 | Gestational age estimated from Head circumference on US (australian society of ultrasound medicine 2000 method) |
| 33110-8 | Gestational age estimated from Head circumference measured on US (chitty 1997 method) |
| 33111-6 | Gestational age estimated from Head circumference derived on US (chitty 1997 method) |
| 33112-4 | Gestational age estimated from Head circumference on US (hansmann 1985 method) |
| 33113-2 | Gestational age estimated from Head circumference on US (jeanty 1982 method) |
| 33114-0 | Gestational age estimated from Head circumference on US (lessoway 1998 method) |
| 33115-7 | Gestational age estimated from Head circumference on US (merz 1988 method) |
| 33116-5 | Gestational age estimated from Humerus length on US (australian society of ultrasound medicine 2000 method) |
| 33117-3 | Gestational age estimated from Humerus length on US (osaka 1989 method) |
| 33118-1 | Gestational age estimated from length of vertebra (method of tokyo 1986 (us)) |
| 33119-9 | Gestational age estimated from Occipital-frontal diameter on US (australian society of ultrasound medicine 2000 method) |
| 33120-7 | Gestational age estimated from Occipital-frontal diameter on US (hansmann 1986 method) |
| 33121-5 | Gestational age estimated from Occipital-frontal diameter on US (lessoway 1998 method) |
| 33122-3 | Gestational age estimated from Inter ocular distance on US (mayden 1982 method) |
| 33123-1 | Gestational age estimated from Inter ocular distance on US (trout 1994 method) |
| 33124-9 | Gestational age estimated from Outer orbital distance on US (mayden 1982 method) |
| 33125-6 | Gestational age estimated from Outer orbital distance on US (trout 1994 method) |
| 33126-4 | Gestational age estimated from Radius length (method of jeanty 1983 (us)) |
| 33127-2 | Gestational age estimated from Spine length (method of tokyo 1989 (us)) |
| 33128-0 | Gestational age estimated from Transverse abdominal diameter on US (eriksen 1985 method) |
| 33129-8 | Gestational age estimated from Transverse abdominal diameter on US (hansmann 1979 method) |
| 33130-6 | Gestational age estimated from Transverse abdominal diameter on US (tokyo 1986 method) |
| 33131-4 | Gestational age estimated from Thoracic circumference on US (chitkara 1987 method) |
| 33132-2 | Gestational age estimated from Transverse cerebral diameter on US (chitty 1994 method) |
| 33133-0 | Gestational age estimated from Transverse cerebral diameter on US (goldstein 1987 method) |
| 33134-8 | Gestational age estimated from Transverse cerebral diameter on US (hill 1990 method) |
| 33135-5 | Gestational age estimated from Thoracic circumference on US (nimrod 1986 method) |
| 33136-3 | Gestational age estimated from Transverse abdominal diameter on US (hansmann 1985 method) |
| 33137-1 | Gestational age estimated from Transverse abdominal diameter on US (lessoway 1998 method) |
| 33138-9 | Gestational age estimated from Fetal trunk area (method of osaka 1989 (us)) |
| 33537-2 | Gestational age estimated from Abdominal circumference on US (jeanty 1982 method) |
| 33538-0 | Gestational age estimated from Biparietal diameter on US (hansmann 1986 method) |
| 33539-8 | Gestational age estimated from Biparietal diameter on US (jeanty 1982 method) |
| 33540-6 | Gestational age estimated from Crown rump length on US (hansmann 1986 method) |
| 33541-4 | Gestational age estimated from Femur length on US (hansmann 1986 method) |
| 33542-2 | Gestational age Estimated from FL.Merz 1988 |
| 33543-0 | Gestational age estimated from Head circumference on US (hansmann 1986 method) |
| 33544-8 | Gestational age estimated from Occipital-frontal diameter on US (hansmann 1985 method) |
| 33545-5 | Gestational age estimated from Binocular distance on US (jeanty 1982 method) |
| 33901-0 | Gestational age of fetus (amniocentesis) |
| 49051-6 | Gestational age in weeks |
| 49052-4 | Gestational age in days |
| 53691-2 | Gestational age Estimated from patient reported estimated date of conception |
| 53693-8 | Gestational age Estimated from conception date |
| 53695-3 | Gestational age Estimated from prior assessment |
| 56081-3 | Fetal gestational age in weeks --at most recent delivery |
| 85719-3 | Gestational age in weeks--at cessation of pregnancy |
| 90367-4 | Gestational age Estimated from physical exam |