Alphabetic Index FY2027

O34.4

Maternal care for other abnormalities of cervix

FY2027Chapter 15: Pregnancy, childbirth and the puerperium/O30–O48 Maternal care related to the fetus and amniotic cavity and possible delivery problems

Non-billable headerNot valid on its own. Use one of the more specific codes under it.

O34.4 is a non-billable ICD-10-CM code header for maternal care for other abnormalities of cervix. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are O34.40 Maternal care for other abnormalities of cervix, unspecified trimester; O34.41 Maternal care for other abnormalities of cervix, first trimester; O34.42 Maternal care for other abnormalities of cervix, second trimester and O34.43 Maternal care for other abnormalities of cervix, third trimester. Its coding notes include a Code first instruction, a Use additional code instruction, 1 Excludes1 entry and 4 Excludes2 entries.

Guidelines tip

From the FY2027 Official Guidelines. ICD10Ref adds no rules of its own.

The trimester character comes from the provider's documentation for the current encounter. The unspecified trimester code should rarely be used.

Guidelines I.C.15.a.3; I.C.15.a.5Pregnancy: the trimester characterRead the official text

Code first

If the underlying condition listed here is present and known, sequence it first.

Inherited from O34 Maternal care for abnormality of pelvic organs
  • any associated obstructed labor (O65.5)

Use additional code

Add the listed code as a secondary code, if known.

Inherited from O34 Maternal care for abnormality of pelvic organs
  • code for specific condition
Also from chapter/block level (1 note)
Inherited from Chapter 15 Pregnancy, childbirth and the puerperium
  • code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.

Excludes1

Not coded here. The listed conditions generally should not be reported together.

Also from chapter/block level (1 note)
Inherited from Chapter 15 Pregnancy, childbirth and the puerperium
  • supervision of normal pregnancy (Z34.-)

Excludes2

Not included here. Both codes may be reported if the patient has both conditions.

Also from chapter/block level (4 notes)
Inherited from Chapter 15 Pregnancy, childbirth and the puerperium
  • mental and behavioral disorders associated with the puerperium (F53.-)
  • obstetrical tetanus (A34)
  • postpartum necrosis of pituitary gland (E23.0)
  • puerperal osteomalacia (M83.0)

Includes

Further defines or gives examples of the content of the category.

Inherited from O34 Maternal care for abnormality of pelvic organs
  • the listed conditions as a reason for hospitalization or other obstetric care of the mother, or for cesarean delivery before onset of labor

Notes

Also from chapter/block level (6 notes)
Inherited from Chapter 15 Pregnancy, childbirth and the puerperium
  • CODES FROM THIS CHAPTER ARE FOR USE ONLY ON MATERNAL RECORDS, NEVER ON NEWBORN RECORDS
  • Codes from this chapter are for use for conditions related to or aggravated by the pregnancy, childbirth, or by the puerperium (maternal causes or obstetric causes)
  • Trimesters are counted from the first day of the last menstrual period. They are defined as follows:
    • 1st trimester- less than 14 weeks 0 days
    • 2nd trimester- 14 weeks 0 days to less than 28 weeks 0 days
    • 3rd trimester- 28 weeks 0 days until delivery

Alphabetic Index terms

Terms the official Alphabetic Index lists for this code. 10 entries

More specific codes under O34.4 4