ICD-10 T86.842
Non-Billable HeaderCorneal transplant infection
About ICD-10-CM T86.842
ICD-10-CM code T86.842 represents Corneal transplant infection. This is a non-billable header code in the Injury, Poisoning, and External Causes chapter (block T86). The 2026 edition of ICD-10-CM T86.842 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.
Coding Tips for T86.842
Specialist guidance from the PayerReady Medical Coding Team. Specificity warnings, HCC capture rules, sequencing notes.
Injury codes require a 7th character: A (initial encounter, active treatment), D (subsequent, healing/recovery), S (sequela, late effect of original injury). Codes with fewer than 6 characters need the placeholder X to bring them to 6 characters before adding the 7th. Wrong or missing 7th character is the #1 cause of injury claim denials.
Use Additional Code
When coding T86.842, also report these additional codes when applicable.
- code to specify infection
Medicare LCD Coverage for T86.842
Local Coverage Determinations (LCDs) from CMS MACs that list T86.842 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 T86.842.
Our payer policy database covers Aetna, Cigna, Anthem, BCBS, Humana, and Medicare Advantage plans, but T86.842 doesn't currently appear in any indexed policy. The code may still be covered under standard plan benefits.
CPT Codes Commonly Billed with T86.842
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 T86.842 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 |
|---|---|---|
| T86.842 | 99669 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To T86.842
Other codes in section T80-T88 (Complications of surgical and medical care, not elsewhere classified).
ICD-10 T86.842, Billing FAQ
Is ICD-10 code T86.842 billable? +
No, T86.842 is a non-billable header code. Use a more specific child code from block T86 when submitting claims.
What ICD-9 codes does T86.842 map to? +
Per CMS GEMs, T86.842 maps to ICD-9 codes: 99669. 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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