ICD-10 code for gestational diabetes

The ICD-10-CM code for gestational diabetes is O24.419 (Gestational diabetes mellitus in pregnancy, unspecified control). The official index lists 12 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on O24.419.

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.