ICD-10 O24.439
Billable / SpecificGestational diabetes mellitus in the puerperium, unspecified control
About ICD-10-CM O24.439
ICD-10-CM code O24.439 represents Gestational diabetes mellitus in the puerperium, unspecified control. This is a billable/specific code in the Pregnancy, Childbirth, and Puerperium chapter (block O24). The 2026 edition of ICD-10-CM O24.439 became effective on October 1, 2025.
Coding Tips for O24.439
Specialist guidance from the PayerReady Medical Coding Team. Specificity warnings, HCC capture rules, sequencing notes.
Most O codes require a 7th character indicating trimester (1 = first, 2 = second, 3 = third). Some require fetus identification character. Code O09 (supervision of high-risk pregnancy) is required as a secondary code when applicable.
Medicare LCD Coverage for O24.439
Local Coverage Determinations (LCDs) from CMS MACs that list O24.439 as a covered diagnosis.
This doesn't mean the code isn't covered, it means no MAC has issued a Local Coverage Determination naming this specific code. Coverage may still apply under National Coverage Determinations or general medical-necessity rules.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing O24.439.
1 Aetna
CPT Codes Commonly Billed with O24.439
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
We don't have CPT pairings indexed for this specific code yet. Use the CPT search above to find common procedures, or check your payer's published medical policy for code-specific guidance.
Convert O24.439 to ICD-9-CM
Per CMS General Equivalence Mappings (GEMs), useful for legacy data review and historical claim analysis.
| ICD-10 | ICD-9 | Mapping Flags |
|---|---|---|
| O24.439 | 64884 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To O24.439
Other codes in section O20-O29 (Other maternal disorders predominantly related to pregnancy).
ICD-10 O24.439, Billing FAQ
Is ICD-10 code O24.439 billable? +
Yes, O24.439 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What ICD-9 codes does O24.439 map to? +
Per CMS GEMs, O24.439 maps to ICD-9 codes: 64884. Useful for legacy data review and historical claim analysis.
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on June 2, 2026.
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