Coding and coverage · ICD-10-CM

O24 › O24.4

O24.43 Gestational diabetes mellitus in the puerperium

Not billable (header)Chapter 15

Report one of the more specific codes below.

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Codes under this one

  • O24.430 Gestational diabetes mellitus in the puerperium, diet controlled
  • O24.434 Gestational diabetes mellitus in the puerperium, insulin controlled
  • O24.435 Gestational diabetes mellitus in puerperium, controlled by oral hypoglycemic drugs
  • O24.439 Gestational diabetes mellitus in the puerperium, unspecified control

Instructional notes

Chapter 15

Excludes1Not coded here: never report with this code, except when the two conditions are unrelated.
  • supervision of normal pregnancy (Z34.-)
Excludes2Not included here: the patient may have both; report both when both are present.
  • 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 codeAdd a second code for the full picture.
  • code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.
Notes
  • 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

Section O20-O29

Excludes2Not included here: the patient may have both; report both when both are present.
  • maternal care related to the fetus and amniotic cavity and possible delivery problems (O30-O48)
  • maternal diseases classifiable elsewhere but complicating pregnancy, labor and delivery, and the puerperium (O98-O99)

O24.4

Inclusion terms
  • Diabetes mellitus arising in pregnancy
  • Gestational diabetes mellitus NOS

Chapter 15: Pregnancy, childbirth and the puerperium (O00-O9A) · O20-O29 Other maternal disorders predominantly related to pregnancy (O20-O29)

Source: ICD-10-CM FY 2027 code descriptions and tabular list (CMS and CDC National Center for Health Statistics), effective 2026-10-01 through 2027-09-30 · CMS ICD-10 files. HCC mapping: CMS-HCC V28, payment year 2027. As of 2026-11-04.

Coverage and payment depend on the claim details; confirm with the Medicare Administrative Contractor.