ICD-10 F78
Non-Billable HeaderOther intellectual disabilities
About ICD-10-CM F78
ICD-10-CM code F78 represents Other intellectual disabilities. This is a non-billable header code in the Mental, Behavioral, and Neurodevelopmental chapter (block F78). The 2026 edition of ICD-10-CM F78 became effective on October 1, 2025. Non-billable codes cannot be used as a primary or secondary diagnosis on a claim, use a more specific child code instead.
Medicare LCD Coverage for F78
Local Coverage Determinations (LCDs) from CMS MACs that list F78 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 F78.
Our payer policy database covers Aetna, Cigna, Anthem, BCBS, Humana, and Medicare Advantage plans, but F78 doesn't currently appear in any indexed policy. The code may still be covered under standard plan benefits.
CPT Codes Commonly Billed with F78
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 F78 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 |
|---|---|---|
| F78 | 319 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To F78
Other codes in section F70-F79 (Intellectual disabilities).
ICD-10 F78, Billing FAQ
Is ICD-10 code F78 billable? +
No, F78 is a non-billable header code. Use a more specific child code from block F78 when submitting claims.
What ICD-9 codes does F78 map to? +
Per CMS GEMs, F78 maps to ICD-9 codes: 319. 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 1, 2026.
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