S40.859D — Superficial foreign body of unspecified upper arm, subsequent encounter
Is S40.859D billable?
Yes, but S40.859D is an unspecified code. S40.859D is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, S40.859D is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting S40.859D — the more specific alternatives are listed below.
S40.859D at a glance
| Code | S40.859D |
|---|---|
| Description | Superficial foreign body of unspecified upper arm, subsequent encounter |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
| 7th character "D" | subsequent encounter |
What does the 7th character "D" mean in S40.859D?
In S40.859D, the 7th character D means subsequent encounter. The 7th character is required for S40.859D to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does S40.859D group to?
S40.859D sits in MDC 23 and helps define the logic of 2 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 949Aftercare with CC/MCCmedical
- 950Aftercare without CC/MCCmedical
How is S40.859D listed in the Alphabetic Index?
The Alphabetic Index lists these routes under S40.85, the nearest indexed parent of S40.859D. Use them to find the family, then select the specific code.
- Foreign body › superficial, without open wound › arm
Use additional code — inherited from Chapter 19
Report an additional code alongside S40.859D to fully describe the condition. S40.859D is sequenced first.
- code to identify any retained foreign body, if applicable (Z18.-)
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of S40.859D, but a patient may have both at the same time. When documentation supports it, S40.859D and the excluded code may both be reported.
Excludes2 — not included here — inherited from S40-S49
The conditions below are not part of S40.859D, but a patient may have both at the same time. When documentation supports it, S40.859D and the excluded code may both be reported.
How long has S40.859D existed?
S40.859D has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.