S21.95 ICD-10-CM Code: Open bite of unspecified part of thorax
Billing Status: NO. This is a clinician non-billable / parent hierarchy grouping in the ICD-10-CM system.
Official Registry Overview & Definition
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for S21.95 in the official ICD-10-CM tabular list.
Includes
Conditions the official ICD-10-CM tabular list includes under this code.
- injuries of breast
- injuries of chest (wall)
- injuries of interscapular area
Excludes1 — Not Coded Here
Conditions generally not reported together with this code (Excludes1) -- an error unless the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
- superficial bite of thorax (S20.97) Compare S21.95 vs S20.97 →
- traumatic amputation (partial) of thorax (S28.1) Compare S21.95 vs S28.1 →
Excludes2 — Not Included Here
Conditions not covered by this code, but which may be reported alongside it when both are present.
- burns and corrosions (T20-T32) Compare S21.95 vs T20 →
- effects of foreign body in bronchus (T17.5) Compare S21.95 vs T17.5 →
- effects of foreign body in esophagus (T18.1) Compare S21.95 vs T18.1 →
- effects of foreign body in lung (T17.8) Compare S21.95 vs T17.8 →
- effects of foreign body in trachea (T17.4) Compare S21.95 vs T17.4 →
- frostbite (T33-T34) Compare S21.95 vs T33 →
- injuries of axilla
- injuries of clavicle
- injuries of scapular region
- injuries of shoulder
- insect bite or sting, venomous (T63.4) Compare S21.95 vs T63.4 →
Code Also
Additional codes that may be required to fully describe the encounter.
Indexed Clinical Terms (1)
Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code.
- Bite (s) (animal) (human), thorax, thoracic (wall)
Frequently Compared Codes
The official Excludes notes on S21.95 name these codes. Each comparison page covers when the two can — or must not — be reported together.
Change history
No changes recorded for this code — unchanged since the FY2016 baseline of the change ledger.
Verify Before Coding
- Not billable as written — a more specific code is required: S21.95XA, S21.95XD, S21.95XS.
- Requires a 7th character. "The appropriate 7th character is to be added to each code from category S21" Options: S21.95XA, S21.95XD, S21.95XS
From the code registry, the Medicare Code Editor, and the MS-DRG Definitions Manual. Check it against a full claim.
Relationships & Classification
Official ICD-10-CM tabular notes on other codes that name S21.95 or its code family.
1 Excludes1 notes: S20.97.
6 Code Also instructions: S23.1 (via S21.-), S24 (via S21.-), S25 (via S21.-), S26 (via S21.-), S27 (via S21.-), S29 (via S21.-).
Contextual Map
Every relationship of S21.95 in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.
Hierarchy
- S00-T88 — Chapter 19: Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88) (S00-T88) [Hierarchy]
Excludes1
- S20.97 — Other superficial bite of unspecified parts of thorax [Excludes1]: “superficial bite of thorax (S20.97)” · check together
Referenced by Excludes1 notes
- S20.97 — Other superficial bite of unspecified parts of thorax [Excludes1]: “open bite of thorax NOS (S21.95)” · check together
Referenced by Code Also instructions
- S23.1 — Subluxation and dislocation of thoracic vertebra [Code Also](via S21.-): “open wound of thorax (S21.-)” · check together
- S24 — Injury of nerves and spinal cord at thorax level [Code Also](via S21.-): “open wound of thorax (S21.-)” · check together
- S25 — Injury of blood vessels of thorax [Code Also](via S21.-): “any associated open wound (S21.-)” · check together
- S26 — Injury of heart [Code Also](via S21.-): “open wound of thorax (S21.-)” · check together
- S27 — Injury of other and unspecified intrathoracic organs [Code Also](via S21.-): “any associated open wound of thorax (S21.-)” · check together
- S29 — Other and unspecified injuries of thorax [Code Also](via S21.-): “any associated open wound (S21.-)” · check together
Index entries
- Bite (s) (animal) (human), thorax, thoracic (wall)[Index term]
Nearest codes (40)
- S21 — Open wound of thorax [Sibling]
- S21.449A — Puncture wound with foreign body of unspecified back wall of thorax with penetration into thoracic cavity, initial encounter [Sibling]
- S21.449D — Puncture wound with foreign body of unspecified back wall of thorax with penetration into thoracic cavity, subsequent encounter [Sibling]
- S21.449S — Puncture wound with foreign body of unspecified back wall of thorax with penetration into thoracic cavity, sequela [Sibling]
- S21.45 — Open bite of back wall of thorax with penetration into thoracic cavity [Sibling]
- S21.451 — Open bite of right back wall of thorax with penetration into thoracic cavity [Sibling]
- S21.451A — Open bite of right back wall of thorax with penetration into thoracic cavity, initial encounter [Sibling]
- S21.451D — Open bite of right back wall of thorax with penetration into thoracic cavity, subsequent encounter [Sibling]
- and 32 more
Frequently Asked Questions (FAQ) & Clinical Guidance
Can S21.95 be billed directly?
No. S21.95 (Open bite of unspecified part of thorax) is a non-billable ICD-10-CM category code. A more specific billable subcode must be selected based on clinical documentation.
Does S21.95 require a 7th character?
Yes. The appropriate 7th character is to be added to each code from category S21.
Nearest Codes in This Family
Official ICD-10-CM classifications closest to S21.95 in its code family, with their registry titles.
- S21.93 — Puncture wound without foreign body of unspecified part of thorax
- S21.93XA — Puncture wound without foreign body of unspecified part of thorax, initial encounter
- S21.93XD — Puncture wound without foreign body of unspecified part of thorax, subsequent encounter
- S21.93XS — Puncture wound without foreign body of unspecified part of thorax, sequela
- S21.94 — Puncture wound with foreign body of unspecified part of thorax
- S21.94XA — Puncture wound with foreign body of unspecified part of thorax, initial encounter
- S21.94XD — Puncture wound with foreign body of unspecified part of thorax, subsequent encounter
- S21.94XS — Puncture wound with foreign body of unspecified part of thorax, sequela
- S21.95XA — Open bite of unspecified part of thorax, initial encounter
- S21.95XD — Open bite of unspecified part of thorax, subsequent encounter