Alphabetic Index FY2027

O64.0XX9

Obstructed labor due to incomplete rotation of fetal head, other fetus

FY2027Chapter 15: Pregnancy, childbirth and the puerperium/O60–O77 Complications of labor and delivery

BillableComplete code, valid to report

O64.0XX9 (also written O640XX9) is a billable ICD-10-CM diagnosis code for obstructed labor due to incomplete rotation of fetal head, other fetus. It is part of the FY2027 code set, effective October 1, 2026. It is one of the 56 codes in category O64 (Obstructed labor due to malposition and malpresentation of fetus). The Alphabetic Index lists it under 9 entries. Its 7th character, 9, means other fetus. Its coding notes include a Use additional code instruction, 1 Excludes1 entry and 4 Excludes2 entries.

7th character

Category O64 requires a 7th character. O64.0 has only 4 characters, so a placeholder X fills the empty positions.

Assembled code O64.0XX9 Open code

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

Use additional code

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

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)

Inclusion terms

Conditions classified to this code.

Inherited from O64.0 Obstructed labor due to incomplete rotation of fetal head
  • Deep transverse arrest
  • Obstructed labor due to persistent occipitoiliac (position)
  • Obstructed labor due to persistent occipitoposterior (position)
  • Obstructed labor due to persistent occipitosacral (position)
  • Obstructed labor due to persistent occipitotransverse (position)

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 O64.0. This code adds the 7th character. 9 entries