2021 ICD-10-CM Diagnosis Code O48.1

Prolonged pregnancy

    2016 2017 2018 2019 2020 2021 Billable/Specific Code Maternity Dx (12-55 years)
  • O48.1 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2021 edition of ICD-10-CM O48.1 became effective on October 1, 2020.
  • This is the American ICD-10-CM version of O48.1 - other international versions of ICD-10 O48.1 may differ.
ICD-10-CM Coding Rules
  • O48.1 is applicable to maternity patients aged 12 - 55 years inclusive.
Applicable To
  • Pregnancy which has advanced beyond 42 completed weeks gestation
The following code(s) above O48.1 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to O48.1:
  • O00-O9A
    2021 ICD-10-CM Range O00-O9A

    Pregnancy, childbirth and the puerperium

    Note
    • 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
    Type 1 Excludes
    • supervision of normal pregnancy (Z34.-)
    Type 2 Excludes
    • mental and behavioral disorders associated with the puerperium (F53.-)
    • obstetrical tetanus (A34)
    • postpartum necrosis of pituitary gland (E23.0)
    • puerperal osteomalacia (M83.0)
    Use Additional
    • code from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.
    Pregnancy, childbirth and the puerperium
Approximate Synonyms
  • Post-term pregnancy
Clinical Information
  • A term used to describe pregnancies that exceed the upper limit of a normal gestational period. In humans, a prolonged pregnancy is defined as one that extends beyond 42 weeks (294 days) after the first day of the last menstrual period (menstruation), or birth with gestational age of 41 weeks or more.
ICD-10-CM O48.1 is grouped within Diagnostic Related Group(s) (MS-DRG v38.0):
  • 817 Other antepartum diagnoses with o.r. Procedures with mcc
  • 818 Other antepartum diagnoses with o.r. Procedures with cc
  • 819 Other antepartum diagnoses with o.r. Procedures without cc/mcc
  • 831 Other antepartum diagnoses without o.r. Procedures with mcc
  • 832 Other antepartum diagnoses without o.r. Procedures with cc
  • 833 Other antepartum diagnoses without o.r. Procedures without cc/mcc

Convert O48.1 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change

Diagnosis Index entries containing back-references to O48.1:
  • Post-dates (40-42 weeks) (pregnancy) (mother) O48.0
    ICD-10-CM Diagnosis Code O48.0

    Post-term pregnancy

      2016 2017 2018 2019 2020 2021 Billable/Specific Code Maternity Dx (12-55 years)
    Applicable To
    • Pregnancy over 40 completed weeks to 42 completed weeks gestation
    • more than 42 weeks gestation O48.1
  • Postmaturity, postmature (over 42 weeks)
    • maternal O48.1 (over 42 weeks gestation)
  • Post-term (40-42 weeks) (pregnancy) (mother) O48.0
    ICD-10-CM Diagnosis Code O48.0

    Post-term pregnancy

      2016 2017 2018 2019 2020 2021 Billable/Specific Code Maternity Dx (12-55 years)
    Applicable To
    • Pregnancy over 40 completed weeks to 42 completed weeks gestation
    • more than 42 weeks gestation O48.1 (mother)
  • Pregnancy (single) (uterine) Z33.1
    - see also Delivery and Puerperal
    ICD-10-CM Diagnosis Code Z33.1

    Pregnant state, incidental

      2016 2017 2018 2019 2020 2021 Billable/Specific Code Maternity Dx (12-55 years)
    Applicable To
    • Pregnancy NOS
    • Pregnant state NOS
    Type 1 Excludes
    • complications of pregnancy (O00-O9A)
    • pregnant state, gestational carrier (Z33.3)
    • complicated by (care of) (management affected by)
      • postmaturity (post-term) (40 to 42 weeks) O48.0
        ICD-10-CM Diagnosis Code O48.0

        Post-term pregnancy

          2016 2017 2018 2019 2020 2021 Billable/Specific Code Maternity Dx (12-55 years)
        Applicable To
        • Pregnancy over 40 completed weeks to 42 completed weeks gestation
        • more than 42 completed weeks gestation O48.1 (prolonged)
    • postmature (40 to 42 weeks) O48.0
      ICD-10-CM Diagnosis Code O48.0

      Post-term pregnancy

        2016 2017 2018 2019 2020 2021 Billable/Specific Code Maternity Dx (12-55 years)
      Applicable To
      • Pregnancy over 40 completed weeks to 42 completed weeks gestation
      • more than 42 weeks gestation O48.1
    • prolonged O48.1 (more than 42 weeks gestation)
  • Prolonged, prolongation (of)
    • gestation (over 42 completed weeks)
      • mother O48.1
    • pregnancy O48.1 (more than 42 weeks gestation)

ICD-10-CM Codes Adjacent To O48.1
O46.93 …… third trimester
O47 False labor
O47.0 False labor before 37 completed weeks of gestation
O47.00 …… unspecified trimester
O47.02 …… second trimester
O47.03 …… third trimester
O47.1 False labor at or after 37 completed weeks of gestation
O47.9 False labor, unspecified
O48 Late pregnancy
O48.0 Post-term pregnancy
O48.1 Prolonged pregnancy
O60 Preterm labor
O60.0 Preterm labor without delivery
O60.00 …… unspecified trimester
O60.02 …… second trimester
O60.03 …… third trimester
O60.1 Preterm labor with preterm delivery
O60.10 Preterm labor with preterm delivery, unspecified trimester
O60.10X0 …… not applicable or unspecified
O60.10X1 …… fetus 1
O60.10X2 …… fetus 2

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.