S20.329A Blister (nonthermal) of unspecified front wall of thorax, initial encounter

Billable ICD-10-CM code, FY2026.

Built from S20.329 with 7th character A (initial encounter).

Applies from S20 Superficial injury of thorax

7th character note

• The appropriate 7th character is to be added to each code from category S20

7th character required

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

Diagnosis Index entries for S20.329A

• Blister (nonthermal) › sternal region

Nearby codes

• S20.324 Blister (nonthermal) of middle front wall of thorax
• S20.324A Blister (nonthermal) of middle front wall of thorax, initial encounter
• S20.324D Blister (nonthermal) of middle front wall of thorax, subsequent encounter
• S20.324S Blister (nonthermal) of middle front wall of thorax, sequela
• S20.329 Blister (nonthermal) of unspecified front wall of thorax
• S20.329A Blister (nonthermal) of unspecified front wall of thorax, initial encounter (this code)
• S20.329D Blister (nonthermal) of unspecified front wall of thorax, subsequent encounter
• S20.329S Blister (nonthermal) of unspecified front wall of thorax, sequela
• S20.34 External constriction of front wall of thorax
• S20.341 External constriction of right front wall of thorax
• S20.341A External constriction of right front wall of thorax, initial encounter