How many codes are in the O30-O48 range?

The O30-O48 range contains 1,636 ICD-10-CM diagnosis codes in FY 2026. 1,349 of them are billable, and the rest are category headers that organize the section.

What conditions does O30-O48 cover?

The range covers maternal care related to the fetus and amniotic cavity and possible delivery problems. The code ranges listed above break it into groups of related conditions, and each one links to its own page with the full code list.

O30-O48 Maternal care related to the fetus

Code Range	Title	Codes	Billable
O30	Multiple gestation (O30)	115	88
O31	Complications specific to multiple gestation (O31)	167	140
O32	Maternal care for malpresentation of fetus (O32)	65	56
O33	Maternal care for disproportion (O33)	46	40
O34	Maternal care for abnormality of pelvic organs (O34)	70	54
O35	Maternal care for known or suspected fetal abnormality and damage (O35)	267	231
O36	Maternal care for other fetal problems (O36)	475	399
O40	Polyhydramnios (O40)	33	28
O41	Other disorders of amniotic fluid and membranes (O41)	201	168
O42	Premature rupture of membranes (O42)	25	18
O43	Placental disorders (O43)	65	48
O44	Placenta previa (O44)	31	24
O45	Premature separation of placenta [abruptio placentae] (O45)	33	24
O46	Antepartum hemorrhage, not elsewhere classified (O46)	33	24
O47	False labor (O47)	7	5
O48	Late pregnancy (O48)	3	2

Multiple gestation (O30)

Inside this range

O30Multiple gestation

Code Also

A "code also" note instructs that two codes may be required to fully describe a condition, but this note does not provide sequencing direction.

any complications specific to multiple gestation

Open O30 →

Complications specific to multiple gestation (O31)

Inside this range

O31Complications specific to multiple gestation

Type 2 Excludes

A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.

delayed delivery of second twin, triplet, etc. O63.2
malpresentation of one fetus or more O32.9
placental transfusion syndromes O43.0

7th Character Note

Certain ICD-10-CM categories have applicable 7th characters. The applicable 7th character is required for all codes within the category, or as the notes in the Tabular List instruct. The 7th character must always be the 7th character in the data field. If a code that requires a 7th character is not 6 characters, a placeholder X must be used to fill in the empty characters.

One of the following 7th characters is to be assigned to each code under category O31. 7th character 0 is for single gestations and multiple gestations where the fetus is unspecified. 7th characters 1 through 9 are for cases of multiple gestations to identify the fetus for which the code applies. The appropriate code from category O30

7th Character

Indicates that a seventh character is to be assigned to codes in a subcategory.

0 - not applicable or unspecified
1 - fetus 1
2 - fetus 2
3 - fetus 3
4 - fetus 4
5 - fetus 5
9 - other fetus

Open O31 →

Maternal care for malpresentation of fetus (O32)

Inside this range

O32Maternal care for malpresentation of fetus

Includes

This note appears immediately under a three character code title to further define, or give examples of, the content of the category.

the listed conditions as a reason for observation, hospitalization or other obstetric care of the mother, or for cesarean delivery before onset of labor

Type 1 Excludes

A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.

malpresentation of fetus with obstructed labor O64

7th Character Note

Certain ICD-10-CM categories have applicable 7th characters. The applicable 7th character is required for all codes within the category, or as the notes in the Tabular List instruct. The 7th character must always be the 7th character in the data field. If a code that requires a 7th character is not 6 characters, a placeholder X must be used to fill in the empty characters.

One of the following 7th characters is to be assigned to each code under category O32. 7th character 0 is for single gestations and multiple gestations where the fetus is unspecified. 7th characters 1 through 9 are for cases of multiple gestations to identify the fetus for which the code applies. The appropriate code from category O30

7th Character

Indicates that a seventh character is to be assigned to codes in a subcategory.

0 - not applicable or unspecified
1 - fetus 1
2 - fetus 2
3 - fetus 3
4 - fetus 4
5 - fetus 5
9 - other fetus

Open O32 →

Maternal care for disproportion (O33)

Inside this range

O33Maternal care for disproportion

Includes

This note appears immediately under a three character code title to further define, or give examples of, the content of the category.

the listed conditions as a reason for observation, hospitalization or other obstetric care of the mother, or for cesarean delivery before onset of labor

Type 1 Excludes

A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.

disproportion with obstructed labor O65 O66

Open O33 →

Maternal care for abnormality of pelvic organs (O34)

Inside this range

O34Maternal care for abnormality of pelvic organs

Includes

This note appears immediately under a three character code title to further define, or give examples of, the content of the category.

the listed conditions as a reason for hospitalization or other obstetric care of the mother, or for cesarean delivery before onset of labor

Code First

Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.

any associated obstructed labor O65.5

Use Additional Code

The “use additional code” indicates that a secondary code could be used to further specify the patient’s condition. This note is not mandatory and is only used if enough information is available to assign an additional code.

code for specific condition

Open O34 →

Maternal care for known or suspected fetal abnormality and damage (O35)

Inside this range

O35Maternal care for known or suspected fetal abnormality and damage

Includes

This note appears immediately under a three character code title to further define, or give examples of, the content of the category.

the listed conditions in the fetus as a reason for hospitalization or other obstetric care to the mother, or for termination of pregnancy

Code Also

A "code also" note instructs that two codes may be required to fully describe a condition, but this note does not provide sequencing direction.

any associated maternal condition

Type 1 Excludes

A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.

encounter for suspected maternal and fetal conditions ruled out Z03.7

7th Character Note

Certain ICD-10-CM categories have applicable 7th characters. The applicable 7th character is required for all codes within the category, or as the notes in the Tabular List instruct. The 7th character must always be the 7th character in the data field. If a code that requires a 7th character is not 6 characters, a placeholder X must be used to fill in the empty characters.

One of the following 7th characters is to be assigned to each code under category O35. 7th character 0 is for single gestations and multiple gestations where the fetus is unspecified. 7th characters 1 through 9 are for cases of multiple gestations to identify the fetus for which the code applies. The appropriate code from category O30

7th Character

Indicates that a seventh character is to be assigned to codes in a subcategory.

0 - not applicable or unspecified
1 - fetus 1
2 - fetus 2
3 - fetus 3
4 - fetus 4
5 - fetus 5
9 - other fetus

Open O35 →

Maternal care for other fetal problems (O36)

Inside this range

O36Maternal care for other fetal problems

Includes

This note appears immediately under a three character code title to further define, or give examples of, the content of the category.

the listed conditions in the fetus as a reason for hospitalization or other obstetric care of the mother, or for termination of pregnancy

Type 1 Excludes

A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.

encounter for suspected maternal and fetal conditions ruled out Z03.7
placental transfusion syndromes O43.0

Type 2 Excludes

A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.

labor and delivery complicated by fetal stress O77

7th Character Note

Certain ICD-10-CM categories have applicable 7th characters. The applicable 7th character is required for all codes within the category, or as the notes in the Tabular List instruct. The 7th character must always be the 7th character in the data field. If a code that requires a 7th character is not 6 characters, a placeholder X must be used to fill in the empty characters.

One of the following 7th characters is to be assigned to each code under category O36. 7th character 0 is for single gestations and multiple gestations where the fetus is unspecified. 7th characters 1 through 9 are for cases of multiple gestations to identify the fetus for which the code applies. The appropriate code from category O30

7th Character

Indicates that a seventh character is to be assigned to codes in a subcategory.

0 - not applicable or unspecified
1 - fetus 1
2 - fetus 2
3 - fetus 3
4 - fetus 4
5 - fetus 5
9 - other fetus

Open O36 →

Polyhydramnios (O40)

Inside this range

O40Polyhydramnios

Includes

This note appears immediately under a three character code title to further define, or give examples of, the content of the category.

hydramnios

Type 1 Excludes

A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.

encounter for suspected maternal and fetal conditions ruled out Z03.7

7th Character Note

Certain ICD-10-CM categories have applicable 7th characters. The applicable 7th character is required for all codes within the category, or as the notes in the Tabular List instruct. The 7th character must always be the 7th character in the data field. If a code that requires a 7th character is not 6 characters, a placeholder X must be used to fill in the empty characters.

One of the following 7th characters is to be assigned to each code under category O40. 7th character 0 is for single gestations and multiple gestations where the fetus is unspecified. 7th characters 1 through 9 are for cases of multiple gestations to identify the fetus for which the code applies. The appropriate code from category O30

7th Character

Indicates that a seventh character is to be assigned to codes in a subcategory.

0 - not applicable or unspecified
1 - fetus 1
2 - fetus 2
3 - fetus 3
4 - fetus 4
5 - fetus 5
9 - other fetus

Open O40 →

Other disorders of amniotic fluid and membranes (O41)

Inside this range

O41Other disorders of amniotic fluid and membranes

Type 1 Excludes

A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.

encounter for suspected maternal and fetal conditions ruled out Z03.7

7th Character Note

Certain ICD-10-CM categories have applicable 7th characters. The applicable 7th character is required for all codes within the category, or as the notes in the Tabular List instruct. The 7th character must always be the 7th character in the data field. If a code that requires a 7th character is not 6 characters, a placeholder X must be used to fill in the empty characters.

One of the following 7th characters is to be assigned to each code under category O41. 7th character 0 is for single gestations and multiple gestations where the fetus is unspecified. 7th characters 1 through 9 are for cases of multiple gestations to identify the fetus for which the code applies. The appropriate code from category O30

7th Character

Indicates that a seventh character is to be assigned to codes in a subcategory.

0 - not applicable or unspecified
1 - fetus 1
2 - fetus 2
3 - fetus 3
4 - fetus 4
5 - fetus 5
9 - other fetus

Open O41 →

Premature rupture of membranes (O42)

Inside this range

O42Premature rupture of membranes

Open O42 →

Placental disorders (O43)

Inside this range

O43Placental disorders

Type 2 Excludes

A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.

maternal care for poor fetal growth due to placental insufficiency O36.5
placenta previa O44
placental polyp O90.89
placentitis O41.14
premature separation of placenta [abruptio placentae] O45

Open O43 →

Placenta previa (O44)

Inside this range

O44Placenta previa

Open O44 →

Premature separation of placenta [abruptio placentae] (O45)

Inside this range

O45Premature separation of placenta [abruptio placentae]

Open O45 →

Antepartum hemorrhage, not elsewhere classified (O46)

Inside this range

O46Antepartum hemorrhage, not elsewhere classified

Type 1 Excludes

A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.

hemorrhage in early pregnancy O20
intrapartum hemorrhage NEC O67
placenta previa O44
premature separation of placenta [abruptio placentae] O45

Open O46 →

False labor (O47)

Inside this range

O47False labor

Includes

This note appears immediately under a three character code title to further define, or give examples of, the content of the category.

Braxton Hicks contractions
threatened labor

Type 1 Excludes

A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.

preterm labor O60

Open O47 →

Late pregnancy (O48)

Inside this range

O48Late pregnancy

Open O48 →

Maternal care related to the fetus and amniotic cavity and possible delivery problems (O30-O48) ICD-10-CM

Code Ranges in This Section 16 ranges · 1,636 codes

About the O30–O48 Code Range

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