ICD-10-CM
ICD-10 code for Blister (nonthermal) sternal region: S20.329
The ICD-10-CM index points "Blister (nonthermal) sternal region" to S20.329, Blister (nonthermal) of unspecified front wall of thorax. S20.329 is not billable on its own. Add the 7th character for the encounter, for example S20.329A, Blister (nonthermal) of unspecified front wall of thorax, initial encounter.
Source: CDC ICD-10-CM FY2027 Alphabetic Index file dated June 16, 2026. Publisher page
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More specific codes in S20
A header groups codes and is not billed. A billable code is one you can report.
- S20Superficial injury of thoraxHeader
- S20.0Contusion of breastHeader
- S20.00Contusion of breast, unspecified breastHeader
- S20.01Contusion of right breastHeader
- S20.02Contusion of left breastHeader
- S20.1Other and unspecified superficial injuries of breastHeader
- S20.10Unspecified superficial injuries of breastHeader
- S20.11Abrasion of breastHeader
- S20.12Blister (nonthermal) of breastHeader
- S20.14External constriction of part of breastHeader
- S20.15Superficial foreign body of breastHeader
- S20.16Insect bite (nonvenomous) of breastHeader
- S20.17Other superficial bite of breastHeader
- S20.2Contusion of thoraxHeader
- S20.20Contusion of thorax, unspecifiedHeader
- S20.21Contusion of front wall of thoraxHeader
- S20.22Contusion of back wall of thoraxHeader
- S20.3Other and unspecified superficial injuries of front wall of thoraxHeader
- S20.30Unspecified superficial injuries of front wall of thoraxHeader
- S20.31Abrasion of front wall of thoraxHeader
- S20.32Blister (nonthermal) of front wall of thoraxHeader
- S20.34External constriction of front wall of thoraxHeader
- S20.35Superficial foreign body of front wall of thoraxHeader
- S20.36Insect bite (nonvenomous) of front wall of thoraxHeader
- S20.37Other superficial bite of front wall of thoraxHeader
- S20.4Other and unspecified superficial injuries of back wall of thoraxHeader
- S20.40Unspecified superficial injuries of back wall of thoraxHeader
- S20.41Abrasion of back wall of thoraxHeader
- S20.42Blister (nonthermal) of back wall of thoraxHeader
- S20.44External constriction of back wall of thoraxHeader
- S20.45Superficial foreign body of back wall of thoraxHeader
- S20.46Insect bite (nonvenomous) of back wall of thoraxHeader
- S20.47Other superficial bite of back wall of thoraxHeader
- S20.9Superficial injury of unspecified parts of thoraxHeader
- S20.90Unspecified superficial injury of unspecified parts of thoraxHeader
- S20.91Abrasion of unspecified parts of thoraxHeader
- S20.92Blister (nonthermal) of unspecified parts of thoraxHeader
- S20.94External constriction of unspecified parts of thoraxHeader
- S20.95Superficial foreign body of unspecified parts of thoraxHeader
- S20.96Insect bite (nonvenomous) of unspecified parts of thoraxHeader
- S20.97Other superficial bite of unspecified parts of thoraxHeader
Related pages
- S20.329 code detailsNotes, nearby codes, CMS-HCC group
- Category S20Every code under it
- Chapter 19Injury, poisoning and certain other consequences
- ICD-10 codes by conditionA to Z
- Check a list of ICD-10 codes
- Denial code CO-11Diagnosis does not support the procedure
- Denial code CO-146Diagnosis invalid for the date of service
- HCPCS Level II code lookup
Questions
What is the ICD-10 code for Blister (nonthermal) sternal region?
The ICD-10-CM index points "Blister (nonthermal) sternal region" to S20.329, Blister (nonthermal) of unspecified front wall of thorax. S20.329 is not billable on its own. Add the 7th character for the encounter, for example S20.329A, Blister (nonthermal) of unspecified front wall of thorax, initial encounter.
Is S20.329 billable?
No. S20.329 is a header in the FY2027 CDC file. Report a more specific code under it.
What chapter is S20.329 in?
Chapter 19. Injury, poisoning and certain other consequences.
When do ICD-10-CM codes change?
Every October 1, with the new fiscal year file. Some years add April 1 updates. This page uses the FY2027 file, effective October 1, 2026.