S62.646A (Nondisplaced fracture of proximal phalanx of right little finger, initial encounter for closed fracture) compared with S62.646S (Nondisplaced fracture of proximal phalanx of right little finger, sequela), from the official CMS tabular data. S62.646A and S62.646S 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. S62.646A and S62.646S 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.
| S62.646ANondisplaced fracture of proximal phalanx of right little finger, initial encounter for closed fracture | S62.646SNondisplaced fracture of proximal phalanx of right little finger, 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 | Nondisplaced fracture of proximal phalanx of right little finger, initial encounter for closed fracture is a billable ICD-10-CM diagnosis code (S62.646A). | Nondisplaced fracture of proximal phalanx of right little finger, sequela is a billable ICD-10-CM diagnosis code (S62.646S). |
| 7th character | The appropriate 7th character is to be added to each code from category S62 | The appropriate 7th character is to be added to each code from category S62 |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources