ICD-10-CM 2027 diagnosis code
O62.0Primary inadequate contractions
O62.0 is a valid, billable ICD-10-CM code for primary inadequate contractions. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About O62.0
O62.0 is the ICD-10-CM diagnosis code for primary inadequate contractions. It belongs to category O62 (abnormalities of forces of labor), block O60-O77 (complications of labor and delivery) and chapter 15 (pregnancy, childbirth and the puerperium). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.
Within O62 (abnormalities of forces of labor), O62.0 is specifically for primary inadequate contractions. Related codes cover secondary uterine inertia (O62.1), other uterine inertia (O62.2), precipitate labor (O62.3), Hypertonic, incoordinate, and prolonged uterine contractions (O62.4), other abnormalities of forces of labor (O62.8) and abnormality of forces of labor, unspecified (O62.9).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 817 (Other Antepartum Diagnoses with O.R. Procedures with MCC, relative weight 2.0534), DRG 818 (Other Antepartum Diagnoses with O.R. Procedures with CC, relative weight 1.2942), DRG 819 (Other Antepartum Diagnoses with O.R. Procedures without CC/MCC, relative weight 0.7739), DRG 831 (Other Antepartum Diagnoses without O.R. Procedures with MCC, relative weight 1.1558), DRG 832 (Other Antepartum Diagnoses without O.R. Procedures with CC, relative weight 0.7585) and DRG 833 (Other Antepartum Diagnoses without O.R. Procedures without CC/MCC, relative weight 0.5002), in MDC 14 (Pregnancy, Childbirth and the Puerperium), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
The Medicare Code Editor treats this as a maternity diagnosis, expected only for patients age 9 through 64.
It is on the CMS list of diagnoses consistent only with female patients (the sex-conflict edit itself was retired in FY2025).
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Before ICD-10, this condition was coded in ICD-9-CM as 661.01 (primary uterine inertia, delivered, with or without mention of antepartum condition).
Coding notes
- Failure of cervical dilatation
- Primary hypotonic uterine dysfunction
- Uterine inertia during latent phase of labor
Notes that apply from higher levels
Instructions written at a parent level also apply to O62.0.
Broader instructions also apply from Chapter 15: Pregnancy, childbirth and the puerperium.
Alphabetic index entries
17 entriesTerms in the official ICD-10-CM index that lead to O62.0.
- Contraction (s), contracture, contracted › uterus › inadequate › primary
- Delivery (childbirth) (labor) › cesarean (for) › inertia, uterus › primary
- Delivery (childbirth) (labor) › cesarean (for) › poor dilatation, cervix
- Delivery (childbirth) (labor) › complicated › by › cervical dystocia (hypotonic) › primary
- Delivery (childbirth) (labor) › complicated › by › dilatation › cervix incomplete, poor or slow
- Delivery (childbirth) (labor) › complicated › by › dysfunction, uterus NOS › hypotonic › primary
- Delivery (childbirth) (labor) › complicated › by › incomplete dilatation (cervix)
- Delivery (childbirth) (labor) › complicated › by › inertia, uterus › during latent phase of labor
- Delivery (childbirth) (labor) › complicated › by › inertia, uterus › primary
- Delivery (childbirth) (labor) › complicated › by › uterine inertia › during latent phase of labor
- Delivery (childbirth) (labor) › complicated › by › uterine inertia › primary
- Dilatation › cervix (uteri) › incomplete, poor, slow complicating delivery
- Dysfunction › uterus, complicating delivery › hypotonic › primary
- Dystocia › cervical (hypotonic) › primary
- Failure, failed › cervical dilatation in labor
- Inertia › uterus, uterine during labor › during latent phase of labor
- Inertia › uterus, uterine during labor › primary
MS-DRG v44.0 grouping
All DRGs →Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.
MDC 14 · Pregnancy, Childbirth and the Puerperium
ICD-9-CM equivalent
Converter →- 661.01Primary uterine inertia, delivered, with or without mention of antepartum conditionapproximate
From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about O62.0
Is O62.0 billable?
- Yes. O62.0 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can O62.0 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict O62.0 as a principal diagnosis.
Is O62.0 a CC or MCC?
- No. O62.0 is neither a CC nor an MCC under MS-DRG v44.0.
What DRG does O62.0 group to?
- O62.0 is used in the MS-DRG v44.0 logic for MS-DRG 817 (Other Antepartum Diagnoses with O.R. Procedures with MCC), MS-DRG 818 (Other Antepartum Diagnoses with O.R. Procedures with CC), MS-DRG 819 (Other Antepartum Diagnoses with O.R. Procedures without CC/MCC), MS-DRG 831 (Other Antepartum Diagnoses without O.R. Procedures with MCC), MS-DRG 832 (Other Antepartum Diagnoses without O.R. Procedures with CC) and MS-DRG 833 (Other Antepartum Diagnoses without O.R. Procedures without CC/MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.
What is the ICD-9 code for O62.0?
- The CMS General Equivalence Mappings map O62.0 to ICD-9-CM 661.01.