S80.221A Blister (nonthermal), right knee, initial encounter

Billable ICD-10-CM code, FY2026.

Built from S80.221 with 7th character A (initial encounter).

Applies from S80 Superficial injury of knee and lower leg

Excludes2 (not included here)

• superficial injury of ankle and foot (S90.-)

7th character note

• The appropriate 7th character is to be added to each code from category S80

7th character required

• A — initial encounter
• D — subsequent encounter
• S — sequela

Code annotations containing back-references to S80.221A

Back-references to S80

• Type 2 Excludes: M23 Internal derangement of knee ("current injury - see injury of knee and lower leg (S80-S89)")

Nearby codes

• S80.219A Abrasion, unspecified knee, initial encounter
• S80.219D Abrasion, unspecified knee, subsequent encounter
• S80.219S Abrasion, unspecified knee, sequela
• S80.22 Blister (nonthermal) of knee
• S80.221 Blister (nonthermal), right knee
• S80.221A Blister (nonthermal), right knee, initial encounter (this code)
• S80.221D Blister (nonthermal), right knee, subsequent encounter
• S80.221S Blister (nonthermal), right knee, sequela
• S80.222 Blister (nonthermal), left knee
• S80.222A Blister (nonthermal), left knee, initial encounter
• S80.222D Blister (nonthermal), left knee, subsequent encounter