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Official Description

Keratomileusis

© Copyright 2026 American Medical Association. All rights reserved.

Common Language Description

Keratomileusis is a specialized surgical procedure classified as a type of keratoplasty, which focuses on the reshaping of the cornea to achieve the desired curvature. This surgical intervention is primarily aimed at correcting refractive errors, thereby enhancing visual acuity for the patient. The procedure involves the meticulous use of an operating microscope to ensure precision during the operation. Initially, the anterior lamella, which is the outer layer of the cornea, is carefully peeled back to expose the underlying corneal tissue. A specific section of this tissue is then excised and subjected to a freezing process. This step is crucial as it allows for the subsequent reshaping of the posterior surface of the corneal tissue. The reshaping can be accomplished through various methods, including the use of a lathe, laser, or knife blade, depending on the specific requirements of the procedure. Once the corneal tissue has been appropriately reshaped, it is sutured back into its original position. To protect the eye post-surgery, a patch or shield may be applied, ensuring that the area remains undisturbed during the initial recovery phase.

© Copyright 2026 Coding Ahead. All rights reserved.

1. Indications

The procedure of keratomileusis is indicated for patients who experience specific refractive errors that affect their visual acuity. These indications include:

  • Myopia A condition where distant objects appear blurry due to excessive curvature of the cornea.
  • Hyperopia A condition where close objects are difficult to see clearly, often due to an insufficiently curved cornea.
  • Astigmatism An irregular curvature of the cornea that leads to distorted or blurred vision at all distances.

2. Procedure

The keratomileusis procedure involves several critical steps that ensure the successful reshaping of the cornea. These steps include:

  • Step 1: Anesthesia Administration The procedure begins with the administration of local anesthesia to ensure the patient remains comfortable and pain-free throughout the surgery. This may involve the use of topical anesthetic drops applied directly to the eye.
  • Step 2: Preparation of the Cornea Once the anesthesia takes effect, the surgeon utilizes an operating microscope to gain a clear view of the eye. The anterior lamella of the cornea is carefully peeled back, exposing the underlying corneal tissue for further manipulation.
  • Step 3: Tissue Removal and Freezing A specific section of the corneal tissue is excised from the eye. This tissue is then frozen to facilitate the reshaping process, allowing for precise alterations to be made to the cornea.
  • Step 4: Reshaping the Corneal Tissue The posterior surface of the frozen corneal tissue is reshaped using one of several methods, including a lathe, laser, or knife blade. This reshaping is critical for correcting the refractive error and improving visual acuity.
  • Step 5: Suturing the Tissue After the reshaping is complete, the corneal tissue is sutured back into its original position. This step is essential for ensuring the stability of the cornea and promoting proper healing.
  • Step 6: Post-Procedure Protection At the conclusion of the procedure, the eye may be covered with a protective patch or shield. This is done to safeguard the eye during the initial recovery period and to prevent any accidental trauma to the surgical site.

3. Post-Procedure

Following the keratomileusis procedure, patients are typically monitored for any immediate complications. Post-procedure care may include the use of prescribed eye drops to prevent infection and reduce inflammation. Patients are advised to avoid rubbing their eyes and to wear the protective patch or shield as directed. Recovery time can vary, but many patients experience improved vision shortly after the procedure, with continued improvement over the following weeks. Regular follow-up appointments are essential to monitor healing and ensure optimal visual outcomes.

Short Descr KERATOMILEUSIS
Medium Descr KERATOMILEUSIS
Long Descr Keratomileusis
Status Code Non-Covered Service
Global Days XXX - Global Concept Does Not Apply
PC/TC Indicator (26, TC) 9 - Not Applicable
Multiple Procedures (51) 9 - Concept does not apply.
Bilateral Surgery (50) 9 - Concept does not apply.
Physician Supervisions 09 - Concept does not apply.
Assistant Surgeon (80, 82) 9 - Concept does not apply.
Co-Surgeons (62) 9 - Concept does not apply.
Team Surgery (66) 9 - Concept does not apply.
Diagnostic Imaging Family 99 - Concept Does Not Apply
APC Status Indicator Non-Covered Service, not paid under OPPS
Type of Service (TOS) 2 - Surgery
Berenson-Eggers TOS (BETOS) P4A - Eye procedure - corneal transplant
MUE 0
CCS Clinical Classification 19 - Other therapeutic procedures on eyelids, conjunctiva, cornea
79 Unrelated procedure or service by the same physician or other qualified health care professional during the postoperative period: the individual may need to indicate that the performance of a procedure or service during the postoperative period was unrelated to the original procedure. this circumstance may be reported by using modifier 79. (for repeat procedures on the same day, see modifier 76.)
LT Left side (used to identify procedures performed on the left side of the body)
RT Right side (used to identify procedures performed on the right side of the body)
SG Ambulatory surgical center (asc) facility service
Date
Action
Notes
2025-01-01 Changed Short Description changed.
Pre-1990 Added Code added.
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