S11.85XA (Open bite of other specified part of neck, initial encounter) compared with S11.85XS (Open bite of other specified part of neck, sequela), from the official CMS tabular data. S11.85XA and S11.85XS 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. S11.85XA and S11.85XS 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.
| S11.85XAOpen bite of other specified part of neck, initial encounter | S11.85XSOpen bite of other specified part of neck, 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 other specified part of neck, initial encounter is a billable ICD-10-CM diagnosis code (S11.85XA). | Open bite of other specified part of neck, sequela is a billable ICD-10-CM diagnosis code (S11.85XS). |
| 7th character | The appropriate 7th character is to be added to each code from category S11 | The appropriate 7th character is to be added to each code from category S11 |
| Includes | injuries of nape injuries of supraclavicular region injuries of throat Bite of other specified part of neck NOS | injuries of nape injuries of supraclavicular region injuries of throat Bite of other specified part of neck NOS |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources