O30.01

Twin pregnancy, monochorionic/monoamniotic

Non-billable header

O30.01 is a non-billable header code. Use one of the more specific codes below.

Inclusion terms

Applicable to

  • Twin pregnancy, one placenta, one amniotic sac

Includes (from O30)

  • Note: CODES FROM THIS CHAPTER ARE FOR USE ONLY ON MATERNAL RECORDS, NEVER ON NEWBORN RECORDS
  • Note: 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)
  • Note: Trimesters are counted from the first day of the last menstrual period. They are defined as follows:
  • Note: 1st trimester- less than 14 weeks 0 days
  • Note: 2nd trimester- 14 weeks 0 days to less than 28 weeks 0 days
  • Note: 3rd trimester- 28 weeks 0 days until delivery

Excludes1

Not coded here — never report together with this code.

  • conjoined twins (O30.02-)
  • supervision of normal pregnancy (Z34.-) (from O30)

Excludes2

Not included here — may be reported together when both conditions exist.

  • mental and behavioral disorders associated with the puerperium (F53.-) (from O30)
  • obstetrical tetanus (A34) (from O30)
  • postpartum necrosis of pituitary gland (E23.0) (from O30)
  • puerperal osteomalacia (M83.0) (from O30)

Use additional code

Add a code to identify the following, if applicable.

  • code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known. (from O30)

Code also

An additional code may be needed.

  • any complications specific to multiple gestation (from O30)

Also known as

  • Twin pregnancy, one placenta, one amniotic sac
  • Pregnancy, twin, monochorionic/monoamniotic

Parent code

  • O30.0Twin pregnancyHeader

More specific codes O30.01

  • O30.011Twin pregnancy, monochorionic/monoamniotic, first trimesterBillable
  • O30.012Twin pregnancy, monochorionic/monoamniotic, second trimesterBillable
  • O30.013Twin pregnancy, monochorionic/monoamniotic, third trimesterBillable
  • O30.019Twin pregnancy, monochorionic/monoamniotic, unspecified trimesterBillable

Related codes

  • O30.00Twin pregnancy, unspecified number of placenta and unspecified number of amniotic sacsHeader
  • O30.02Conjoined twin pregnancyHeader
  • O30.03Twin pregnancy, monochorionic/diamnioticHeader
  • O30.04Twin pregnancy, dichorionic/diamnioticHeader
  • O30.09Twin pregnancy, unable to determine number of placenta and number of amniotic sacsHeader

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