LCD L35091: Cataract Extraction (including Complex Cataract Surgery)

Compliance with the provisions in this LCD may be monitored and addressed through post payment data analysis and subsequent medical review audits.

History/Background and/or General Information

Cataracts occur frequently as a progressive, age-related disease that is the leading cause of blindness in the U.S. and accounts for 50% of visual impairment over the age of 40. Cataracts are the leading cause of treatable blindness among African Americans age 40 and older. As part of the aging process, the lens increases in thickness and weight causing hardening and compression on the nucleus eventually developing a yellow-brown color that changes the transparency of the lens. Cataracts have several different types that have their own anatomical location, pathology, and risk factors (e.g., nuclear, cortical, subcapsular [anterior and posterior], and mixed).

Cataracts can lead to blurred or distorted vision, glare problems, color vision defects, and a decline of contrast sensitivity and depth perception. These impairments lead to loss of balance, less independent mobility, falls, injuries, increased mortality risk, and decreased mental well-being. This raises more concern for the elderly population due to underlying systemic comorbidities. Visual function plays a major role in physical performance, mental well-being, and mobility for the elderly. 1 Risk factors for cataracts include diabetes mellitus, family history, hypertension, ionizing radiation, myopia, obesity, smoking, ultraviolet-B light exposure, long-term topical, systemic, or oral corticosteroid use, prior intraocular surgery, and lower level education.

Improving visual function and quality of life have increased the demand for cataract surgery. Since there are no pharmacologic treatments to eliminate cataracts, cataract surgery is the primary management of significant visual impairment. 1 Due to the different types of cataracts, the decision-making process for cataract surgery can be complex in determining the appropriate treatment, technique, devices, and complications to consider. Symptomatic cataract is a surgical disease and the standard of care in cataract surgery in the U.S. is a small-incision phacoemulsification with foldable intraocular lens (IOL) implantation. 1

In consideration for cataract surgery, cataract patients must have an impairment of visual function due to cataract(s) resulting in the decreased ability to carry out activities of daily living such as reading, viewing television, driving or meeting occupational or vocational expectations. This LCD provides medically reasonable and necessary indications for both routine and complex cataract surgery. Coverage will be based upon documentation that supports medical necessity and therefore covered by Medicare when one or more of the covered indications are present.

Covered Indications

Cataract Surgery will be considered medically reasonable and necessary when one or more of the following indications are present:

• Visual function no longer meets the patient’s needs based on visual acuity, visual impairment, and potential for functional benefits. 2

• Visual Impairment and function are not correctable by glasses or other non-surgical measures. 3

• The patient has undergone a preoperative examination that documents the following:

• Inability to function satisfactorily due to visual impairment while performing various Activities of Daily Living. 1,2

• Confirmation that cataract is causing the visual impairment or other ocular or systemic conditions. 1

• Cataract is causing unacceptable glare, polyopia, or reduced quality of vision. 1-3

• There is clinically significant anisometropia in the presence of a cataract. 1,2

• The lens opacity interferes with optimal diagnosis or management of posterior segment conditions. 1,2

• The lens causes inflammation or secondary glaucoma (phacolysis, phaco-anaphylaxis). 1,2

• There is worsening angle closure (phacomorphic glaucoma) due to increase in size of the crystalline lens. 1,2

• A significant cataract is present in a patient who will be undergoing concurrent surgery in the same eye, such as a trabeculectomy or a corneal transplant when the surgeon deems that the decreased morbidity of single stage surgery is of significant benefit over surgery on separate dates. 1,2

Please refer to NCD 10.1-Use of Visual Tests Prior to and General Anesthesia During Cataract Surgery for information on pre surgery evaluations.

Complex cataract surgery :

Indications:

Complex cataract surgery will be considered medically reasonable and necessary when there is one of the following:

• A miotic pupil that will not dilate sufficiently 4 requirng the use of a mechanical iris expansion device (Iris retractors through four additional incisions, Beehler expansion device, or Malyugin ring) to adequately visualize the lens in the posterior chamber of the eye. 4

• Pre-existing zonular weakness requiring use of capsular tension rings or segments or intraocular suturing of the intraocular lens. 5

• Pediatric cataract surgery, intraoperatively difficult because of an anterior capsule that is more difficult to tear, cortex that is more difficult to remove needing a primary posterior capsulotomy or capsulorrhexis.

• Mature cataract requiring dye for visualization of capsulorrhexis.

Refer to CMS IOM Pub. 100-04, Medicare Claims Processing Manual , Chapter 32, Section 120, for CMS guidelines on IOL insertion benefit following cataract surgery.

Limitations

The following are considered contraindicators to surgery for visually impairing cataract and are not considered medically reasonable and necessary:

• Tolerable refractive correction that provides vision and meets the patient’s needs and desires. 2

• The patient’s lifestyle is not compromised by the cataract and they are able to perform activities of daily living. 1,2

• The patient cannot safely undergo surgery because of coexisting medical or ocular conditions. 1,2

• Surgery is not expected to improve visual function, or no other indication for lens removal exists. 1,2

Provider Qualifications

Services will be considered medically reasonable and necessary when all aspects of care are within the scope of practice of the provider’s professional licensure, when performed according to the supervision requirements per state scope of practice laws, and when all procedures are performed by appropriately trained providers in the appropriate setting.

Notice: Services performed for any given diagnosis must meet all of the indications and limitations stated in this LCD, the general requirements for medical necessity as stated in CMS payment policy manuals, any and all existing CMS national coverage determinations, and all Medicare payment rules.

The content of this LCD is supported through an evidence-based literature search of articles and publications through PubMed. We identified articles based on a key word search for: indications for complex cataract surgery, miotic pupil or small pupil in complex cataract surgery, and pseudoexfoliation in complex cataract surgery. The literature search was filtered to find articles within 5-10 years, with one exception where an article dated back to 2001. Filters also included full text articles, clinical trials, randomized controlled trials, and systematic reviews. Below is a summary of evidence to support the medically reasonable and necessary indications for Cataract Extraction (Including Complex Cataract Surgery) and explanation of limitations.

Michalska-Malecka, et al 3 conducted a study at University Hospital No. 5 of the Medical University of Silesia between 2008-2009. In this retrospective study, Michalaska-Malecka and his colleagues set out to investigate the effectiveness and safety of cataract surgery and IOL implantation for patients aged 90 years or older (43 men and 79 women). Patients considered for the study had significant bilateral cataracts causing visual impairment not correctable by glasses, best corrected visual acuity (BCVA) score worse than 0.7, an unacceptable glare, polyopia, or overall reduced vision quality due to cataracts. As this study focuses on the very elderly population, Michalska-Malecka noted that coexisting systemic disorders, patient cooperation during surgery, higher incidence of hard nucleus, smaller pupil size and high rate of pseudoexfoliation syndrome make it difficult to perform cataract surgery. Individuals that were excluded from the study were those that were under the age of 90, had a BCVA score of 0.7 or greater, a baseline endothelial cell density of less than 1,500 cells/mm, uncontrolled glaucoma, and physical or mental disability that would make it difficult to perform the surgery. According to Michalska-Malecka, cataracts are one of the most frequent reasons for visual impairment around the world. As cataracts and its visual impairment reduces quality of life, phacoemulsification surgery and extracapsular cataract extraction have proven to be effective with increasing visual acuity. In this study, phacoemulsification was performed on 113 of 122 eyes and extracapsular cataract extraction (ECCE) was performed on 9 of 122 eyes. Visual acuity was increased after the first postoperative day, 3 months, and 6 months after surgery. The BCVA scores improved in 100 out of the 122 patients (82%) with senile cataracts from this study. Visual acuity results remained the same in 20 of the patients and decreased in 2 of the patients because of co-existing age-related macular degeneration (AMD). The Intraocular pressure (IOP) in patients with or without glaucoma were shown to have little to no postoperative differences than preoperatively. Patients with glaucoma had a significant difference in IOP, postoperatively, while the patients without glaucoma had no difference. These results show that cataract surgery is safe and effective in the treatment of senile cataracts in the very elderly population. Michalaska-Malecka states, “Little evidence has been found to support the hypothesis that age alone is a risk factor for phaco-cataract surgery for intraoperative complications." 11

Bargoud et al 4 and colleagues conducted a retrospective, observational cohort study with the aim to see whether complex cataract surgery using the phacoemulsification technique and a mechanical iris expansion device (iris hooks, Kuglen hooks, and Malyugin rings) will lower IOP for patients with glaucoma. Bargoud 4 mentions the importance of this study in glaucoma patients with the modifiable risk factor of increased IOP. However, a significantly higher proportion of patients with glaucoma have been found to have smaller pupils compared with similar control groups, and on patients who underwent cataract surgery, they require iris manipulation and pupil expansion more frequently. This study was conducted at the University Hospital in Newark, New Jersey of surgeries from 2008-2016. The study was comprised of two groups: the primary open angle closure group and the control group that included patients without primary open-angle glaucoma (POAG) who underwent phacoemulsification with intraoperative mechanical pupillary expansion. Thirty-seven eyes from the 31 glaucoma patients (5 with mature cataracts) and 29 eyes from the 28 control patients (3 with mature cataracts) were included in the study and met the inclusion criteria. The other eyes in both groups had non-mature cataracts. Inclusion criteria focused on eyes that were diagnosed with POAG and had no prior incisional surgery for 1 year or 1 year after. Exclusion criteria included 1. eyes that had no confirmed glaucoma diagnosis, 2. had non-POAG types of glaucoma such as neovascular, uveitic, or chronic angle closure, 3. prior incisional glaucoma surgery, 4. eyes that had a phacoemulsification that was combined with another surgery and pupillary expansion devices was not confirmed from the operative report, and 5. had a vitrectomy, anterior chamber intraocular lens, and/or sulcus placement or conversion to large incisional surgery. The POAG group was significantly older than the control group at the time of surgery (72.5 ±10.2 versus 65.3 ±11.5 years old; p = 0.01). However, there were no significant differences in the proportions of hypertension, diabetes, or hyperlipidemia between the control and the POAG group. The study shows an increase 15.0 ± 4.6 to 15.9 ± 3.5 in IOP in the POAG group while the control group shows a decrease 14.1 ± 3.6 to 11.9 ± 3.9 at 12 months postoperative. Throughout the follow up period the control group showed significant decrease in IOP while the POAG group showed a significant decrease in mean antiglaucoma medication burden with improvement in visual acuity in both groups, more specifically the control group. More complications were noted in the POAG group than the control group. Complex cataract surgery did not decrease the IOP in patients with primary open angle glaucoma. However, it did improve visual acuity and reduced medication burden in the POAG group. Complex cataract surgery did, however, decrease IOP in patients without POAG and improve visual acuity. This study shows that complex cataract surgery, such as phacoemulsification with intraoperative mechanical pupillary expansion is useful in improvements of cataracts and glaucoma.

Miyoshi 5 and colleagues conducted a retrospective study to assess the effects of using the capsular tension ring (CTR) on the surgical outcomes of toric and multifocal IOLs in eyes with zonular instability. A total of 55 eyes from 43 patients (70.7 ± 10.3 years old) were included who were high risk for zonular instability that included pseudoexfoliation, shallow anterior chamber, high myopia, phacodonesis, or unstable zonules. A total of 55 eyes from 43 patients (70.7 ± 10.3 years old) were included in this retrospective study undergoing phacoemulsification and IOL implantation using CTR on toric and multifocal IOLs. These eyes were at high risk for zonular instability that included pseudoexfoliation, shallow anterior chamber, high myopia, phacodonesis, or unstable zonules. The Toric IOL group had 9 eyes with CTR and 22 eyes without CTR while the multifocal IOL had 9 eyes with CTR and 15 eyes without CTR. No history of ocular surgery other than cataract removal was reported. The exclusion criteria included any eyes that experienced intraoperative complications affecting the IOL stability, except for zonular instability. One surgeon performed all cases using a standard technique of phacoemulsification through a 2.4-mm temporal clear corneal incision. Patients were followed up for 3 months. Manifest refraction, refractive astigmatism, visual acuity, and degree of IOL decentration and tilt were measured using swept-source anterior segment optical coherence tomography. Axis misalignment of Toric IOLs was also evaluated. Results show that the decentration and axis misalignment of the Toric group was smaller with the CTR than without (p = 0.037), better visual acuity with CTR than without, and a smaller axis misalignment with CTR (p = 0.037). Although the multifocal group prevented IOL tilt, manifested better visual acuity with CTR than without (p = 0.021), and had a smaller degree of tilt in CTR than without (p = 0.025), the follow up period was longer with CTR. There were a few limitations in this study to include a random assignment of eyes to CTR or non-CTR by the judgement of the surgeon, the follow-up period was significantly longer in the multifocal IOL without CTR group than the multifocal IOL with CTR group, measurements of wave-front aberration were not conducted in this study, and no evaluation was done on the multifocal Toric IOLs. Overall, the end results show that the outcome of Toric IOLs co-implantation of CTR significantly reduce decentration and toxic axis misalignment that improves uncorrected and corrected visual acuity postoperatively. In multifocal IOLs, the combined use of CTR significantly prevented IOL tilt and resulted in better uncorrected visual acuity. This study shows that CTR is a useful device to improve surgical outcomes of premium IOL in eyes at high risk of compromised zonular integrity.