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S02.122A

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S02.122A

Short Definition

Fracture of the left orbital roof, closed, during the initial encounter while the patient is receiving active treatment.

Long Clinical Definition

S02.122A describes a closed fracture of the bony orbital roof (superior wall of the bony orbit) on the left side, during the initial encounter for active treatment.
The orbital roof forms part of the anterior cranial fossa and separates the orbit from the frontal lobe; fractures here often arise from significant blunt or penetrating craniofacial trauma and may involve the skull base, frontal sinus, or intracranial structures.

This code is used when the fracture is closed (no open communication through the skin or mucosa) and the provider service represents active initial management, such as ED stabilization, inpatient admission, surgical planning, or operative repair. Subsequent visits for healing, complications, or late effects require different 7th characters (D, G, K, S) in the same code family.

Anatomic and Clinical Context

  • Region: Left orbital roof (superior orbital wall), part of the frontal bone and anterior cranial fossa.

  • Structures at risk:

    • Frontal lobe of brain and meninges.
    • Frontal sinus.
    • Superior rectus and levator palpebrae muscles.
    • Optic nerve, ophthalmic vasculature (particularly in high-energy injuries).

  • Common mechanisms:

    • High-energy blunt trauma (MVC, fall from height, assault).
    • Direct impact to supraorbital area or forehead.
    • Penetrating trauma (projectile, foreign body).

  • Typical clinical features:

    • Periorbital ecchymosis and swelling.
    • Pain with eye movement, diplopia (if extraocular muscles or nerves affected).
    • Possible CSF leak (from skull base involvement).
    • Neurologic deficits if intracranial injury is present.

Official Code Structure and Tree

ICD-10-CM Code Tree

  • S00-T88 Injury, poisoning and certain other consequences of external causes
    • S00-S09 Injuries to the head
      • S02 Fracture of skull and facial bones
        • S02.1 Fracture of base of skull
          • S02.12 Fracture of orbital roof
            • S02.121A - Fracture of orbital roof, right side, initial encounter for closed fracture
            • S02.122A - Fracture of orbital roof, left side, initial encounter for closed fracture
            • S02.123A - Fracture of orbital roof, unspecified side, initial encounter for closed fracture
            • S02.121B / S02.122B / S02.123B - initial encounter for open fracture
            • S02.12XD / G / K - subsequent encounters (routine, delayed healing, nonunion)
            • S02.12XS - sequela

7th Character Use (for S02.122x)

  • A - Initial encounter for closed fracture (active treatment - this code).
  • B - Initial encounter for open fracture.
  • D - Subsequent encounter for closed fracture with routine healing.
  • G - Subsequent encounter for closed fracture with delayed healing.
  • K - Subsequent encounter for closed fracture with nonunion.
  • S - Sequela (late effects).

Includes / Excludes / Code Also

Includes

  • Closed fracture of left orbital roof (superior orbital wall).
  • Traumatic left orbital roof fracture with or without minimal displacement.
  • Left orbital roof fracture associated with facial trauma without explicit mention of open wound.

Excludes1 (not coded with S02.122A)

  • Fracture of orbital floor → S02.3-
  • Fracture of medial orbital wall → S02.83-
  • Fracture of lateral orbital wall → S02.84-
  • Isolated nasal bone fractures → S02.2-
  • Fracture of vault of skull without orbital involvement → S02.0- or S02.1x with different sub-sites.

Excludes2 / Code Also

  • Any associated intracranial injury → S06.- (e.g., contusion, hemorrhage, diffuse TBI).
  • Associated open wound of head → S01.-, if a separate open wound is documented.
  • Other facial fractures (zygoma, maxilla, NOE fracture) → S02.3-, S02.4-, S02.8- codes as appropriate.

HCC / Risk Adjustment

  • HCC status:

    • S02.122A is an acute trauma code and typically does not map to a CMS-HCC for risk adjustment.
    • Risk adjustment for trauma is usually driven by comorbid conditions (e.g., coagulopathy, chronic disease) rather than the acute fracture diagnosis itself.

  • RAF documentation:

    • While it may not carry HCC weight, precise documentation is still important for SOI/ROM and quality metrics.

MS-DRG Considerations

S02.122A is usually a secondary diagnosis that can influence severity of illness rather than serve as the principal DRG driver.

  • Likely principal diagnoses in trauma cases:

    • Intracranial injury (S06.-)
    • Multiple trauma / polytrauma codes
    • Specific acute neurosurgical or craniofacial conditions.

  • Possible DRG groupings (conceptual examples, not exhaustive):

    • DRG 052-056: Non-traumatic cranial procedures, when neurosurgical repair or skull base surgery is performed.
    • DRG 130-131: Major head and neck procedures, when craniofacial ORIF or orbit repair is principal.
    • Trauma-related DRGs (e.g., multiple significant trauma) when combined with other injuries and procedures.

Coding note:

  • Accurate assignment of S02.122A with appropriate comorbid injuries (S06.-, other S02.- codes) and procedures (e.g., craniofacial ORIF CPT/PCS codes) will influence APR-DRG and MS-DRG severity tiers.

Relationship to CPT (Procedural Side) and wRVUs

ICD-10-CM codes do not have RVUs; those attach to CPT/HCPCS procedure codes. For S02.122A, common procedural pairings include:

Diagnostic Imaging (Professional RVUs apply to CPT)

  • 70450 - CT head without contrast.
  • 70480 - CT orbit/sella/ear without contrast.
  • 70481 / 70482 - With contrast/with and without contrast variants, if performed.

Each of these CPT codes has its own work RVU, which you would pull from the current year Medicare Physician Fee Schedule or your preferred RVU table.

Surgical Management (Representative CPT Codes)

Actual code selection depends strongly on op note details, but common patterns include:

  • 21495 - Open treatment of complex facial fracture involving orbit, with internal fixation; this may apply when the orbital roof fracture is part of a complex midface/skull fracture.
  • 21390 - Open treatment of naso-orbito-ethmoid fracture; sometimes relevant in NOE fracture patterns involving orbital roof.
  • 61500-61510 range - Cranial procedures involving approach to anterior cranial fossa or skull base (neurosurgical involvement in complex orbital roof/skull base trauma).

For each of those CPT codes:

  • wRVU: determined by CPT + year-specific MPFS.
  • Assistant-at-surgery: check MPFS assistant-at-surgery indicator (many open craniofacial and cranial procedures = assistant allowed).

Assistant at Surgery - General Guidance

  • Open craniofacial and skull base procedures are often technically complex and usually allow assistant surgeons (MPFS assistant indicator 1).
  • For any specific CPT used with S02.122A:
    • If assistant indicator = 1 → assistant is payable at standard percentage (often 16% of surgeon’s fee).
    • If assistant indicator = 0 → assistant is not payable.
  • Always verify at the CPT level in the current MPFS.

Coding Examples (ICD-10-CM + CPT)

These examples are illustrative patterns for your vault, not billing advice for any specific payer.

Example 1 - ED Evaluation and CT Imaging Only

  • Scenario:
    22-year-old, struck in the face during sports. Presents with periorbital swelling and pain. CT orbit shows closed left orbital roof fracture, no intracranial injury. Managed conservatively, discharged with outpatient follow-up.

  • ICD-10-CM:

    • S02.122A - Fracture of orbital roof, left side, initial encounter for closed fracture.
    • W21.02XA - Struck by soccer ball, initial encounter (example external cause).
    • Y93.66 - Activity, soccer, if payer and documentation support external cause coding.

  • CPT (professional):

    • 9928x - ED E/M level based on documentation.
    • 70480 - CT orbit/sella/ear without contrast (radiologist interpretation).

Example 2 - Neurosurgical/ENT Open Repair of Left Orbital Roof Fracture

  • Scenario:
    45-year-old with high-speed MVC, CT shows displaced left orbital roof fracture with small intracranial contusion. Neurosurgery and ENT perform combined open repair with plating.

  • ICD-10-CM:

    • S02.122A - Fracture of orbital roof, left side, initial encounter for closed fracture.
    • S06.31XA - Focal traumatic brain injury with loss of consciousness, initial encounter (example).
    • V43.52XA - Car driver injured in collision with other vehicle, initial encounter (example external cause).

  • CPT (professional - simplified):

    • 21495 - Open treatment of complex facial fracture involving orbit with internal fixation (ENT / craniofacial surgeon).
    • 61510 - Craniotomy for supratentorial lesion / skull base access (neurosurgeon), if documented and appropriate.

    Assistants may be reported with modifiers 80/81/82 when allowed.

Example 3 - Subsequent Follow-Up (For Your Own Reference)

Not S02.122A, but same family for longitudinal coding logic:

  • Scenario:
    Same patient returns 6 weeks later for follow-up. Fracture is healing routinely.

  • ICD-10-CM:

    • S02.122D - Fracture of orbital roof, left side, subsequent encounter for fracture with routine healing.

No longer use “A” because the encounter is now part of healing/follow-up rather than initial active treatment.

Key Coding Pearls for S02.122A

  • Always confirm:

    • Side (right/left/unspecified).
    • Site (orbital roof vs. floor vs. wall).
    • Open vs. closed.
    • Initial vs. subsequent vs. sequela.

  • Use S02.122A only when:

    • The fracture is left orbital roof.
    • The fracture is closed.
    • The encounter is initial and reflects active treatment.

  • Pair with:

    • Appropriate external cause codes (sports, assault, MVC) when required or recommended.
    • S06.- codes for any associated intracranial injuries.
    • Additional S02.- codes for other facial/skull fractures.

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