S80.229A — Blister (nonthermal), unspecified knee, initial encounter
Is S80.229A billable?
Yes, but S80.229A is an unspecified code. S80.229A is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, S80.229A 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 S80.229A — the more specific alternatives are listed below.
S80.229A at a glance
| Code | S80.229A |
|---|---|
| Description | Blister (nonthermal), unspecified knee, initial encounter |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
| 7th character "A" | initial encounter |
What does the 7th character "A" mean in S80.229A?
In S80.229A, the 7th character A means initial encounter. The 7th character is required for S80.229A to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does S80.229A group to?
S80.229A sits in MDC 09 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.
- 606Minor Skin Disorders with MCCmedical
- 607Minor Skin Disorders without MCCmedical
How is S80.229A listed in the Alphabetic Index?
The Alphabetic Index lists these routes under S80.22, the nearest indexed parent of S80.229A. Use them to find the family, then select the specific code.
- Blister › knee (nonthermal)
Use additional code — inherited from Chapter 19
Report an additional code alongside S80.229A to fully describe the condition. S80.229A 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 S80.229A, but a patient may have both at the same time. When documentation supports it, S80.229A and the excluded code may both be reported.
Excludes2 — not included here — inherited from S80-S89
The conditions below are not part of S80.229A, but a patient may have both at the same time. When documentation supports it, S80.229A and the excluded code may both be reported.
Excludes2 — not included here — inherited from S80
The conditions below are not part of S80.229A, but a patient may have both at the same time. When documentation supports it, S80.229A and the excluded code may both be reported.
- superficial injury of ankle and foot (S90.-)
How long has S80.229A existed?
S80.229A 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.