S89.90 ICD-10-CM Code: Unspecified injury of unspecified lower leg
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 S89.90 in the official ICD-10-CM tabular list.
Excludes2 — Not Included Here
Conditions not covered by this code, but which may be reported alongside it when both are present.
- other and unspecified injuries of ankle and foot (S99.-) Compare S89.90 vs S99 →
- burns and corrosions (T20-T32) Compare S89.90 vs T20 →
- frostbite (T33-T34) Compare S89.90 vs T33 →
- injuries of ankle and foot, except fracture of ankle and malleolus (S90-S99) Compare S89.90 vs S90 →
- insect bite or sting, venomous (T63.4) Compare S89.90 vs T63.4 →
Frequently Compared Codes
The official Excludes notes on S89.90 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: S89.90XA, S89.90XD, S89.90XS.
- Requires a 7th character. "The appropriate 7th character is to be added to each code in subcategory S89.9" Options: S89.90XA, S89.90XD, S89.90XS
From the code registry, the Medicare Code Editor, and the MS-DRG Definitions Manual. Check it against a full claim.
Contextual Map
Every relationship of S89.90 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]
Nearest codes (40)
- S89 — Other and unspecified injuries of lower leg [Sibling]
- S89.391S — Other physeal fracture of lower end of right fibula, sequela [Sibling]
- S89.392 — Other physeal fracture of lower end of left fibula [Sibling]
- S89.392A — Other physeal fracture of lower end of left fibula, initial encounter for closed fracture [Sibling]
- S89.392D — Other physeal fracture of lower end of left fibula, subsequent encounter for fracture with routine healing [Sibling]
- S89.392G — Other physeal fracture of lower end of left fibula, subsequent encounter for fracture with delayed healing [Sibling]
- S89.392K — Other physeal fracture of lower end of left fibula, subsequent encounter for fracture with nonunion [Sibling]
- S89.392P — Other physeal fracture of lower end of left fibula, subsequent encounter for fracture with malunion [Sibling]
- and 32 more
Frequently Asked Questions (FAQ) & Clinical Guidance
Can S89.90 be billed directly?
No. S89.90 (Unspecified injury of unspecified lower leg) is a non-billable ICD-10-CM category code. A more specific billable subcode must be selected based on clinical documentation.
Does S89.90 require a 7th character?
Yes. The appropriate 7th character is to be added to each code in subcategory S89.9; The appropriate 7th character is to be added to each code from subcategories S89.0, S89.1, S89.2, and S89.3.
Nearest Codes in This Family
Official ICD-10-CM classifications closest to S89.90 in its code family, with their registry titles.
- S89.82 — Other specified injuries of left lower leg
- S89.82XA — Other specified injuries of left lower leg, initial encounter
- S89.82XD — Other specified injuries of left lower leg, subsequent encounter
- S89.82XS — Other specified injuries of left lower leg, sequela
- S89.9 — Unspecified injury of lower leg
- S89.90XA — Unspecified injury of unspecified lower leg, initial encounter
- S89.90XD — Unspecified injury of unspecified lower leg, subsequent encounter
- S89.90XS — Unspecified injury of unspecified lower leg, sequela
- S89.91 — Unspecified injury of right lower leg
- S89.91XA — Unspecified injury of right lower leg, initial encounter