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ICD-10/S90.56

S90.56 ICD-10-CM Code: Insect bite (nonvenomous) of ankle

Billing Status: NO. This is a clinician non-billable / parent hierarchy grouping in the ICD-10-CM system.

Official Registry Overview & Definition

Insect bite (nonvenomous) of ankle is a non-billable ICD-10-CM category code (S90.56). A more specific billable subcode must be selected for claims submission.

Official Tabular Instructional Notes

Sequencing, inclusion, and exclusion notes published for S90.56 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.

Change history

No changes recorded for this code — unchanged since the FY2016 baseline of the change ledger.

Verify Before Coding

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 S90.56 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]

Referenced by Excludes1 notes

  • S91.05 — Open bite of ankle [Excludes1]: “superficial bite of ankle (S90.56-, S90.57-)” · check together

Referenced by Excludes2 notes (11)

  • S80 — Superficial injury of knee and lower leg [Excludes2](via S90.-): “superficial injury of ankle and foot (S90.-)” · check together
  • S80-S89 — Injuries to the knee and lower leg (S80-S89) [Excludes2](via S90.-): “injuries of ankle and foot, except fracture of ankle and malleolus (S90-S99)” · check together
  • S81 — Open wound of knee and lower leg [Excludes2](via S90.-): “injuries of ankle and foot, except fracture of ankle and malleolus (S90-S99)” · check together
  • S82 — Fracture of lower leg, including ankle [Excludes2](via S90.-): “injuries of ankle and foot, except fracture of ankle and malleolus (S90-S99)” · check together
  • S83 — Dislocation and sprain of joints and ligaments of knee [Excludes2](via S90.-): “injuries of ankle and foot, except fracture of ankle and malleolus (S90-S99)” · check together
  • S84 — Injury of nerves at lower leg level [Excludes2](via S90.-): “injuries of ankle and foot, except fracture of ankle and malleolus (S90-S99)” · check together
  • S85 — Injury of blood vessels at lower leg level [Excludes2](via S90.-): “injuries of ankle and foot, except fracture of ankle and malleolus (S90-S99)” · check together
  • S86 — Injury of muscle, fascia and tendon at lower leg level [Excludes2](via S90.-): “injuries of ankle and foot, except fracture of ankle and malleolus (S90-S99)” · check together
  • and 3 more

Nearest codes (40)

  • S90 — Superficial injury of ankle, foot and toes [Sibling]
  • S90.542A — External constriction, left ankle, initial encounter [Sibling]
  • S90.542D — External constriction, left ankle, subsequent encounter [Sibling]
  • S90.542S — External constriction, left ankle, sequela [Sibling]
  • S90.549 — External constriction, unspecified ankle [Sibling]
  • S90.549A — External constriction, unspecified ankle, initial encounter [Sibling]
  • S90.549D — External constriction, unspecified ankle, subsequent encounter [Sibling]
  • S90.549S — External constriction, unspecified ankle, sequela [Sibling]
  • and 32 more

Referenced by Other Codes

Official ICD-10-CM tabular notes on other codes that name S90.56 or its code family.

1 Excludes1 notes: S91.05.

11 Excludes2 notes: S80 (via S90.-), S80-S89 (via S90.-), S81 (via S90.-), S82 (via S90.-), S83 (via S90.-), S84 (via S90.-), S85 (via S90.-), S86 (via S90.-), S87 (via S90.-), S88 (via S90.-) and 1 more.

Frequently Asked Questions (FAQ) & Clinical Guidance

Can S90.56 be billed directly?

No. S90.56 (Insect bite (nonvenomous) of ankle) is a non-billable ICD-10-CM category code. A more specific billable subcode must be selected based on clinical documentation.

Does S90.56 require a 7th character?

Yes. The appropriate 7th character is to be added to each code from category S90.

Nearest Codes in This Family

Official ICD-10-CM classifications closest to S90.56 in its code family, with their registry titles.

  • S90.552S — Superficial foreign body, left ankle, sequela
  • S90.559 — Superficial foreign body, unspecified ankle
  • S90.559A — Superficial foreign body, unspecified ankle, initial encounter
  • S90.559D — Superficial foreign body, unspecified ankle, subsequent encounter
  • S90.559S — Superficial foreign body, unspecified ankle, sequela
  • S90.561 — Insect bite (nonvenomous), right ankle
  • S90.561A — Insect bite (nonvenomous), right ankle, initial encounter
  • S90.561D — Insect bite (nonvenomous), right ankle, subsequent encounter
  • S90.561S — Insect bite (nonvenomous), right ankle, sequela
  • S90.562 — Insect bite (nonvenomous), left ankle

View all codes in the S90 family