S27.899A vs S27.899S
S27.899A (Unspecified injury of other specified intrathoracic organs, initial encounter) compared with S27.899S (Unspecified injury of other specified intrathoracic organs, sequela), from the official CMS tabular data. S27.899A and S27.899S code the same injury at a different phase of treatment.
Can these codes be reported together?
Same injury, other encounter phase. S27.899A and S27.899S 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.
Side by side
| S27.899AUnspecified injury of other specified intrathoracic organs, initial encounter | S27.899SUnspecified injury of other specified intrathoracic organs, 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 | Unspecified injury of other specified intrathoracic organs, initial encounter is a billable ICD-10-CM diagnosis code (S27.899A). | Unspecified injury of other specified intrathoracic organs, sequela is a billable ICD-10-CM diagnosis code (S27.899S). |
| 7th character | The appropriate 7th character is to be added to each code from category S27 | The appropriate 7th character is to be added to each code from category S27 |
| Includes | injuries of breast injuries of chest (wall) injuries of interscapular area | injuries of breast injuries of chest (wall) injuries of interscapular area |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources