T17.1XXA (Foreign body in nostril, initial encounter) compared with T17.1XXD (Foreign body in nostril, subsequent encounter), from the official CMS tabular data. T17.1XXA and T17.1XXD 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. T17.1XXA and T17.1XXD 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.
| T17.1XXAForeign body in nostril, initial encounter | T17.1XXDForeign body in nostril, subsequent encounter | |
|---|---|---|
| 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 | Foreign body in nostril, initial encounter is a billable ICD-10-CM diagnosis code (T17.1XXA). | Foreign body in nostril, subsequent encounter is a billable ICD-10-CM diagnosis code (T17.1XXD). |
| 7th character | The appropriate 7th character is to be added to each code from category T17 | The appropriate 7th character is to be added to each code from category T17 |
| Includes | Foreign body in nose NOS | Foreign body in nose NOS |
| Use additional code | code, if known, for foreign body entering into or through a natural orifice (W44.-) | code, if known, for foreign body entering into or through a natural orifice (W44.-) |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources