S61.252A (Open bite of right middle finger without damage to nail, initial encounter) compared with S61.252S (Open bite of right middle finger without damage to nail, sequela), from the official CMS tabular data. S61.252A and S61.252S code the same injury at a different phase of treatment.
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. S61.252A and S61.252S 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.
| S61.252AOpen bite of right middle finger without damage to nail, initial encounter | S61.252SOpen bite of right middle finger without damage to nail, 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 | Open bite of right middle finger without damage to nail, initial encounter is a billable ICD-10-CM diagnosis code (S61.252A). | Open bite of right middle finger without damage to nail, sequela is a billable ICD-10-CM diagnosis code (S61.252S). |
| 7th character | The appropriate 7th character is to be added to each code from category S61 | The appropriate 7th character is to be added to each code from category S61 |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources