T26.10XA (Burn of cornea and conjunctival sac, unspecified eye, initial encounter) compared with T26.10XS (Burn of cornea and conjunctival sac, unspecified eye, sequela), from the official CMS tabular data. T26.10XA and T26.10XS code the same injury at a different phase of treatment. MedCoder-derived
Same underlying diagnosis, different encounter phase.
The 7th character records the phase of care for the encounter being coded, so a single encounter takes one of these characters, not several. Review whether both phases belong on the same episode of care.
Source: ICD-10-CM Official Guidelines, Section I.C.19.a
Same injury, other encounter phase. T26.10XA and T26.10XS code the same injury at a different phase of treatment, set by the 7th character.
The 7th character records the type of care given at the encounter being coded (ICD-10-CM Official Guidelines, Section I.C.19.a), so one encounter takes one of these, not both.
| T26.10XABurn of cornea and conjunctival sac, unspecified eye, initial encounter | T26.10XSBurn of cornea and conjunctival sac, unspecified eye, sequela | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | S00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88) | S00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88) |
| Definition | Burn of cornea and conjunctival sac, unspecified eye, initial encounter is a billable ICD-10-CM diagnosis code (T26.10XA). | Burn of cornea and conjunctival sac, unspecified eye, sequela is a billable ICD-10-CM diagnosis code (T26.10XS). |
| 7th character | The appropriate 7th character is to be added to each code from category T26 | The appropriate 7th character is to be added to each code from category T26 |
| Use additional code | external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92) | external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92) |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources