O24.420 — Gestational diabetes mellitus in childbirth, diet controlled
Is O24.420 billable?
Yes — O24.420 is billable for FY2027. O24.420 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. O24.420 may be submitted for encounters from October 1, 2026 through September 30, 2027.
O24.420 at a glance
| Code | O24.420 |
|---|---|
| Description | Gestational diabetes mellitus in childbirth, diet controlled |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does O24.420 group to?
O24.420 sits in MDC 14 and helps define the logic of 1 MS-DRG (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 998—
How is O24.420 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to O24.420. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Diabetes, diabetic › gestational › in childbirth › diet controlled (mellitus) (sugar)
- Delivery › complicated › by › diabetes › gestational › diet controlled (childbirth) (labor)
- Delivery › complicated › by › gestational › diabetes › diet controlled (childbirth) (labor)
Excludes1 — never code together — inherited from Chapter 15
The conditions below can never be reported together with O24.420 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- supervision of normal pregnancy (Z34.-)
Use additional code — inherited from Chapter 15
Report an additional code alongside O24.420 to fully describe the condition. O24.420 is sequenced first.
- code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.
Excludes2 — not included here — inherited from Chapter 15
The conditions below are not part of O24.420, but a patient may have both at the same time. When documentation supports it, O24.420 and the excluded code may both be reported.
Excludes2 — not included here — inherited from O20-O29
The conditions below are not part of O24.420, but a patient may have both at the same time. When documentation supports it, O24.420 and the excluded code may both be reported.
How long has O24.420 existed?
O24.420 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.