S20
Non-Billable

Superficial injury of thorax

Non-Billable / Non-Specific Code

What is Superficial injury of thorax?

ICD-10-CM S20 is the diagnosis code for Superficial injury of thorax. This code falls under the section "Injuries to the thorax" within Chapter 19 — Injury, poisoning and certain other consequences of external causes (S00-T88). It is a non-billable/non-specific ICD-10-CM code that should not be used for reimbursement. A more specific sub-code is required for billing. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.

Coding Guidelines for S20

Always refer to the official ICD-10-CM Tabular List for complete coding guidelines. Ensure documentation supports the specificity of the code selected. When in doubt, consult a certified medical coder or the latest CMS guidelines.

ICD-10-CM Code Hierarchy

Understanding where S20 sits in the ICD-10-CM classification helps ensure proper coding:

Sub-Codes 6 entries
S20.0Contusion of breastNon-BillableS20.00Contusion of breast, unspecified breastBillableS20.01Contusion of right breastBillableS20.02Contusion of left breastBillableS20.1Other and unspecified superficial injuries of breastNon-BillableS20.10Unspecified superficial injuries of breastNon-BillableS20.101Unspecified superficial injuries of breast, right breastBillableS20.102Unspecified superficial injuries of breast, left breastBillableS20.109Unspecified superficial injuries of breast, unspecified breastBillableS20.11Abrasion of breastNon-BillableS20.111Abrasion of breast, right breastBillableS20.112Abrasion of breast, left breastBillableS20.119Abrasion of breast, unspecified breastBillableS20.12Blister (nonthermal) of breastNon-BillableS20.121Blister (nonthermal) of breast, right breastBillableS20.122Blister (nonthermal) of breast, left breastBillableS20.129Blister (nonthermal) of breast, unspecified breastBillableS20.14External constriction of part of breastNon-BillableS20.141External constriction of part of breast, right breastBillableS20.142External constriction of part of breast, left breastBillableS20.149External constriction of part of breast, unspecified breastBillableS20.15Superficial foreign body of breastNon-BillableS20.151Superficial foreign body of breast, right breastBillableS20.152Superficial foreign body of breast, left breastBillableS20.159Superficial foreign body of breast, unspecified breastBillableS20.16Insect bite (nonvenomous) of breastNon-BillableS20.161Insect bite (nonvenomous) of breast, right breastBillableS20.162Insect bite (nonvenomous) of breast, left breastBillableS20.169Insect bite (nonvenomous) of breast, unspecified breastBillableS20.17Other superficial bite of breastNon-BillableS20.171Other superficial bite of breast, right breastBillableS20.172Other superficial bite of breast, left breastBillableS20.179Other superficial bite of breast, unspecified breastBillableS20.2Contusion of thoraxNon-BillableS20.20Contusion of thorax, unspecifiedBillableS20.21Contusion of front wall of thoraxNon-BillableS20.211Contusion of right front wall of thoraxBillableS20.212Contusion of left front wall of thoraxBillableS20.213Contusion of bilateral front wall of thoraxBillableS20.214Contusion of middle front wall of thoraxBillableS20.219Contusion of unspecified front wall of thoraxBillableS20.22Contusion of back wall of thoraxNon-BillableS20.221Contusion of right back wall of thoraxBillableS20.222Contusion of left back wall of thoraxBillableS20.223Contusion of bilateral back wall of thoraxBillableS20.224Contusion of middle back wall of thoraxBillableS20.229Contusion of unspecified back wall of thoraxBillableS20.3Other and unspecified superficial injuries of front wall of thoraxNon-BillableS20.30Unspecified superficial injuries of front wall of thoraxNon-BillableS20.301Unspecified superficial injuries of right front wall of thoraxBillableS20.302Unspecified superficial injuries of left front wall of thoraxBillableS20.303Unspecified superficial injuries of bilateral front wall of thoraxBillableS20.304Unspecified superficial injuries of middle front wall of thoraxBillableS20.309Unspecified superficial injuries of unspecified front wall of thoraxBillableS20.31Abrasion of front wall of thoraxNon-BillableS20.311Abrasion of right front wall of thoraxBillableS20.312Abrasion of left front wall of thoraxBillableS20.313Abrasion of bilateral front wall of thoraxBillableS20.314Abrasion of middle front wall of thoraxBillableS20.319Abrasion of unspecified front wall of thoraxBillableS20.32Blister (nonthermal) of front wall of thoraxNon-BillableS20.321Blister (nonthermal) of right front wall of thoraxBillableS20.322Blister (nonthermal) of left front wall of thoraxBillableS20.323Blister (nonthermal) of bilateral front wall of thoraxBillableS20.324Blister (nonthermal) of middle front wall of thoraxBillableS20.329Blister (nonthermal) of unspecified front wall of thoraxBillableS20.34External constriction of front wall of thoraxNon-BillableS20.341External constriction of right front wall of thoraxBillableS20.342External constriction of left front wall of thoraxBillableS20.343External constriction of bilateral front wall of thoraxBillableS20.344External constriction of middle front wall of thoraxBillableS20.349External constriction of unspecified front wall of thoraxBillableS20.35Superficial foreign body of front wall of thoraxNon-BillableS20.351Superficial foreign body of right front wall of thoraxBillableS20.352Superficial foreign body of left front wall of thoraxBillableS20.353Superficial foreign body of bilateral front wall of thoraxBillableS20.354Superficial foreign body of middle front wall of thoraxBillableS20.359Superficial foreign body of unspecified front wall of thoraxBillableS20.36Insect bite (nonvenomous) of front wall of thoraxNon-BillableS20.361Insect bite (nonvenomous) of right front wall of thoraxBillableS20.362Insect bite (nonvenomous) of left front wall of thoraxBillableS20.363Insect bite (nonvenomous) of bilateral front wall of thoraxBillableS20.364Insect bite (nonvenomous) of middle front wall of thoraxBillableS20.369Insect bite (nonvenomous) of unspecified front wall of thoraxBillableS20.37Other superficial bite of front wall of thoraxNon-BillableS20.371Other superficial bite of right front wall of thoraxBillableS20.372Other superficial bite of left front wall of thoraxBillableS20.373Other superficial bite of bilateral front wall of thoraxBillableS20.374Other superficial bite of middle front wall of thoraxBillableS20.379Other superficial bite of unspecified front wall of thoraxBillableS20.4Other and unspecified superficial injuries of back wall of thoraxNon-BillableS20.40Unspecified superficial injuries of back wall of thoraxNon-BillableS20.401Unspecified superficial injuries of right back wall of thoraxBillableS20.402Unspecified superficial injuries of left back wall of thoraxBillableS20.409Unspecified superficial injuries of unspecified back wall of thoraxBillableS20.41Abrasion of back wall of thoraxNon-BillableS20.411Abrasion of right back wall of thoraxBillableS20.412Abrasion of left back wall of thoraxBillableS20.419Abrasion of unspecified back wall of thoraxBillableS20.42Blister (nonthermal) of back wall of thoraxNon-BillableS20.421Blister (nonthermal) of right back wall of thoraxBillableS20.422Blister (nonthermal) of left back wall of thoraxBillableS20.429Blister (nonthermal) of unspecified back wall of thoraxBillableS20.44External constriction of back wall of thoraxNon-BillableS20.441External constriction of right back wall of thoraxBillableS20.442External constriction of left back wall of thoraxBillableS20.449External constriction of unspecified back wall of thoraxBillableS20.45Superficial foreign body of back wall of thoraxNon-BillableS20.451Superficial foreign body of right back wall of thoraxBillableS20.452Superficial foreign body of left back wall of thoraxBillableS20.459Superficial foreign body of unspecified back wall of thoraxBillableS20.46Insect bite (nonvenomous) of back wall of thoraxNon-BillableS20.461Insect bite (nonvenomous) of right back wall of thoraxBillableS20.462Insect bite (nonvenomous) of left back wall of thoraxBillableS20.469Insect bite (nonvenomous) of unspecified back wall of thoraxBillableS20.47Other superficial bite of back wall of thoraxNon-BillableS20.471Other superficial bite of right back wall of thoraxBillableS20.472Other superficial bite of left back wall of thoraxBillableS20.479Other superficial bite of unspecified back wall of thoraxBillableS20.9Superficial injury of unspecified parts of thoraxNon-BillableS20.90Unspecified superficial injury of unspecified parts of thoraxBillableS20.91Abrasion of unspecified parts of thoraxBillableS20.92Blister (nonthermal) of unspecified parts of thoraxBillableS20.94External constriction of unspecified parts of thoraxBillableS20.95Superficial foreign body of unspecified parts of thoraxBillableS20.96Insect bite (nonvenomous) of unspecified parts of thoraxBillableS20.97Other superficial bite of unspecified parts of thoraxBillable
Related Codes

Frequently Asked Questions

Is S20 a billable ICD-10-CM code?

No, S20 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.

What does S20 mean?

S20 is the ICD-10-CM diagnosis code for "Superficial injury of thorax". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.

What section is S20 in?

S20 is located in Section S20-S29 — "Injuries to the thorax" within Chapter 19 of the ICD-10-CM Tabular List.

What are the sub-codes of S20?

S20 has 6 sub-code(s) that provide more specific detail: S20.0, S20.1, S20.2, S20.3, S20.4 and more.

When should I use S20?

Use S20 when the patients documented diagnosis matches "Superficial injury of thorax" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.

People Also Ask

What is the ICD-10 code for Superficial injury of thorax?

The ICD-10-CM code for Superficial injury of thorax is S20.

Can S20 be used for primary diagnosis?

No, S20 is non-billable. Use a more specific sub-code for primary diagnosis billing.

What chapter is S20 in?

S20 is in Chapter 19 of the ICD-10-CM Tabular List.

Is S20 valid for 2026?

Yes, S20 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.

See Also

← PreviousS19.9Unspecified injury of neckNext →S20.0Contusion of breast
Code Details
S20
Superficial injury of thorax
Non-Billable / Non-Specific Code
19 — Injury, poisoning and certain other consequences of external causes (S00-T88)
S20-S29 — Injuries to the thorax
2026 ICD-10-CM