Skip to content
Dx

ICD-10-CM 2027 diagnosis code

O24.419Gestational diabetes mellitus in pregnancy, unspecified control

✓ Billable / specificMaternity · age 9–64Female only

O24.419 is a valid, billable ICD-10-CM code for gestational diabetes mellitus in pregnancy, unspecified control. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.Short description: Gestational diabetes mellitus in pregnancy, unsp control

Looking up by condition? See ICD-10 code for Gestational diabetes.

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 O24.419

O24.419 is the ICD-10-CM diagnosis code for gestational diabetes mellitus in pregnancy, unspecified control. It belongs to category O24 (diabetes mellitus in pregnancy, childbirth, and the puerperium), block O20-O29 (other maternal disorders predominantly related to pregnancy) 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 O24.41, choose O24.419 (unspecified control) only when documentation doesn't support a more specific option: diet controlled (O24.410), insulin controlled (O24.414) and controlled by oral hypoglycemic drugs (O24.415).

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 648.81 (abnormal glucose tolerance of mother, delivered, with or without mention of antepartum condition) and 648.83 (abnormal glucose tolerance of mother, antepartum condition or complication).

Notes that apply from higher levels

Instructions written at a parent level also apply to O24.419.

Broader instructions also apply from O20-O29 Other maternal disorders predominantly related to pregnancy and Chapter 15: Pregnancy, childbirth and the puerperium.

Alphabetic index entries

1 entries

Terms in the official ICD-10-CM index that lead to O24.419.

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.

ICD-9-CM equivalent

Converter →
  • 648.81Abnormal glucose tolerance of mother, delivered, with or without mention of antepartum conditionapproximate
  • 648.83Abnormal glucose tolerance of mother, antepartum condition or complicationapproximate

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about O24.419

Is O24.419 billable?

Yes. O24.419 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can O24.419 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict O24.419 as a principal diagnosis.

Is O24.419 a CC or MCC?

No. O24.419 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does O24.419 group to?

O24.419 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 O24.419?

The CMS General Equivalence Mappings map O24.419 to ICD-9-CM 648.81 and 648.83.