# Glaucoma Surgery: Cost, Coverage, and What to Expect

Source: https://ourhealthnetwork.com/procedure-costs/glaucoma-surgery
Last reviewed: 2026-04-18
Data: CMS Hospital and Outpatient pricing, CPT/HCPCS code mapping

## Quick answer

Medicare pays a weighted average of about $464 for glaucoma surgery across seven common procedures. The actual ticket ranges from roughly $170 for an in-office SLT laser to over $1,400 for an implanted drainage shunt, with commercial insurance and cash prices running 2x to 5x higher.

## What it is

Glaucoma surgery is a group of procedures that lower the pressure inside your eye. In glaucoma, fluid inside the eye (called aqueous humor) cannot drain properly. Pressure builds up and slowly damages the optic nerve, which is the cable that carries vision signals to your brain. Once that nerve is damaged, the vision loss is permanent. Surgery does not reverse damage that has already happened. It protects the vision you still have by helping fluid drain out of the eye faster.

There is no single "glaucoma surgery." The data on this page covers seven distinct Medicare-billed procedures that range from a five-minute in-office laser to a formal operating-room case with an implanted drainage device.

Here's what's typically involved:

- **Surgery time:** 5 to 10 minutes for a laser procedure like SLT or iridotomy. 45 to 90 minutes for a trabeculectomy, tube shunt, or MIGS device.
- **Anesthesia:** Numbing eye drops for in-office lasers. Local anesthesia with IV sedation for operating-room procedures. General anesthesia is uncommon.
- **Hospital stay:** None. Every procedure here is outpatient. You go home the same day.
- **Incision:** No incision for lasers. For trabeculectomy and tube shunts, the surgeon lifts the thin membrane over the white of the eye (conjunctiva) to access drainage structures. The eye itself is not "cut open" the way people imagine.
- **Eye patch or shield:** You usually wear a shield over the eye for the first night after operating-room procedures.

The seven variants on this page fall into four groups. Laser procedures (SLT, iridotomy, cyclophotocoagulation) are the least invasive and usually come first. MIGS procedures like canaloplasty open natural drainage channels through a tiny cut during or after cataract surgery. Traditional filtering surgery (trabeculectomy) creates a new drainage path under the eyelid. Tube shunts implant a small drainage tube connected to a plate stitched to the eye wall, typically reserved for aggressive or advanced glaucoma. Which one your surgeon recommends depends on how bad your pressure is, how your optic nerve looks, and what's been tried before.

## When it is done

Surgery is almost never the first treatment for glaucoma. Eye drops are. The usual path is drops first, laser next, and operating-room surgery only if pressure stays too high or if the optic nerve keeps getting worse. That said, SLT laser is now sometimes offered as a first-line option instead of drops because it's low-risk and avoids decades of daily drop compliance.

Your doctor may recommend glaucoma surgery when:

1. Eye drops are not lowering your pressure enough to protect the optic nerve.
2. You cannot tolerate the drops (allergy, dry eye, burning, or cost).
3. You cannot reliably use the drops every day (memory, physical ability, or travel).
4. Your visual field test is getting worse despite treatment.
5. The optic nerve looks more damaged on imaging compared to last year.
6. You have narrow angles at risk of an acute pressure spike (laser iridotomy).
7. You are having cataract surgery and your surgeon can add a MIGS device at the same time.

There are always alternatives, and most are worth asking about. Switching to a different drop class, adding a second drop, or trying SLT before a bigger surgery are all reasonable steps. A second opinion from a glaucoma specialist is especially worth it before committing to trabeculectomy or a tube shunt, since those carry real recovery and complication risk.

## What you pay

The number you actually owe for glaucoma surgery depends on three things: which procedure (SLT is cheap, tube shunts are not), where it's done (office vs operating room), and how you're paying. Medicare reimbursement on this page is the surgeon's fee only. A facility fee gets billed separately for operating-room cases and can double or triple the total bill. Commercial insurance typically pays 2x to 4x Medicare rates, and uninsured cash pricing varies wildly depending on whether you negotiate a bundled rate.

**If you're on Medicare:**

- Most glaucoma surgery is outpatient, so this falls under Part B, not Part A. The Part B deductible is $257 in 2025 figure, and after you meet it, you pay 20% coinsurance of the Medicare-allowed amount.
- For an in-office SLT on Medicare, your 20% share is around $35 to $70. For an operating-room tube shunt, your 20% of the surgeon fee is about $285, plus 20% of the facility fee (often another $400 to $900).
- Medicare Supplement (Medigap) plans usually cover the 20%, leaving you with near-zero out of pocket for the procedure itself.
- Medicare Advantage plans use their own copays and prior authorization. Confirm before scheduling, especially for MIGS devices which sometimes trigger coverage reviews.

**If you have commercial insurance:**

- Before your deductible is met, you typically owe the full negotiated rate, which can run $1,500 for SLT up to $8,000+ for a tube shunt.
- After deductible, most plans pay 70% to 90%, leaving you 10% to 30% coinsurance up to your out-of-pocket max.
- The ACA out-of-pocket max for 2025 is $9,200 for an individual and $18,400 for a family. That's the most you'll owe in-network for the year including the surgery.
- Get a Good Faith Estimate (required by law for self-pay) or a pre-service cost estimate from your insurer. They legally must provide one.

**If you're uninsured or paying cash:**

- SLT laser negotiated cash-pay rates typically land between $1,500 and $2,500 per eye.
- Trabeculectomy or tube shunt bundled cash-pay pricing (surgeon + facility + anesthesia combined) runs $6,000 to $15,000 per eye.
- Ask specifically for the bundled cash-pay price rather than the chargemaster rate, which can be 3x to 5x higher.
- Hospital-based charity care and discount programs are federally required for nonprofit hospitals. Ambulatory surgery centers often offer cash pricing that beats hospital rates by 30% to 50%.

## Anatomy of the bill

A glaucoma surgery bill is almost never one line item. Depending on the variant, you can expect three to six separate charges from different billing parties. Understanding who bills what helps you catch out-of-network surprises before they hit your card.

**Surgeon fee:** This is the Medicare payment shown in the data on this page, ranging from $168 for SLT to $1,428 for a tube shunt. Your ophthalmologist bills this directly.

**Facility fee:** For operating-room procedures (trabeculectomy, tube shunts, canaloplasty), the ambulatory surgery center or hospital outpatient department bills a separate facility fee. On Medicare this is roughly $1,500 to $3,500 depending on the procedure and setting. Commercial facility fees can be 3x to 5x higher.

**Anesthesia:** Operating-room cases add an anesthesiologist or nurse anesthetist bill, typically $400 to $1,200 on Medicare and more on commercial. In-office lasers need only numbing drops and have no anesthesia bill.

**Device or implant:** Tube shunts (Ahmed, Baerveldt, PAUL) and MIGS devices (iStent, Hydrus, Xen) add a device cost that's usually bundled into the facility fee on Medicare, but commercial plans sometimes itemize it at $800 to $3,500.

**Pre-op evaluation:** Visual field testing, OCT imaging of the optic nerve, and a pre-op office visit are separate charges, typically $150 to $400 each on Medicare-allowed rates.

**Post-op visits:** Most glaucoma surgeries include a 90-day global period, meaning follow-up visits are bundled in the surgeon fee. After 90 days, office visits bill separately.

**Medications:** Post-op drops (antibiotic, steroid, sometimes pressure-lowering drops) are filled through your pharmacy benefit, typically $20 to $200 depending on coverage.

## Cost by state

State-level Medicare payment varies less for glaucoma surgery than for many other procedures because Medicare's geographic practice cost index (GPCI) smooths out differences. That said, there's still a meaningful spread. Vermont posts the lowest weighted state average at $193 per service, while North Dakota tops the list at $531. High-volume states cluster tightly around the national mean: California ($312 across 30,000+ services), Florida ($321 across 21,000+), and New York ($323 across 19,000+).

Texas, New Jersey, and Virginia each cross 10,000 services annually. On the low end, states with small populations like Wyoming, Maine, and Alaska post lower service counts. Their payment averages don't tell you much because the variant mix differs by state; a state doing more tube shunts than SLT will show a higher average regardless of GPCI.

**Why costs vary by state:**

- **Medicare GPCI:** Medicare adjusts payment for local wages, rent, and malpractice costs. Urban coasts run higher than rural interior.
- **Variant mix:** States with more glaucoma specialists doing tube shunts will show higher averages than states dominated by community SLT practices.
- **Commercial negotiating power:** Market concentration (one big insurer vs several) affects commercial rates more than Medicare. In consolidated markets, hospital systems negotiate higher facility fees.
- **State facility fee rules:** Some states regulate what ambulatory surgery centers can charge on commercial plans, which doesn't affect Medicare but shrinks commercial bills.

## Office vs facility

Glaucoma surgery splits almost evenly between settings in the Medicare data: 168,000 services in facility settings (hospital outpatient or ambulatory surgery center) and 86,000 in the office. The split maps to variant type. SLT, iridotomy, and some cyclophotocoagulation happen in-office at an average Medicare payment of $210. Trabeculectomy, canaloplasty, and tube shunts happen in a facility at $675 weighted average for the surgeon alone, plus a separate facility fee.

For the procedures that can be done in either setting, the patient choice is usually between a hospital outpatient department and an ambulatory surgery center (ASC). Medicare pays the surgeon the same in both, but facility fees can differ by 40% or more, and ASCs usually win that comparison.

**When a hospital outpatient department makes more sense:**

- Higher-risk patients (complicated cardiac history, oxygen dependence, prior bad anesthesia reaction)
- Revision surgery or complex eyes with scarring from prior operations
- Surgeon only operates at that hospital

**When an ambulatory surgery center makes more sense:**

- Lower facility fees, sometimes 30% to 50% less on commercial plans
- Shorter door-to-door time (often under 3 hours total)
- Routine trabeculectomy, tube shunts, and MIGS on otherwise healthy patients

## Who performs the procedure

Glaucoma surgery is performed almost exclusively by ophthalmologists. In the Medicare data, 99%+ of services are billed under ophthalmology, across nearly 2,800 unique providers doing 255,000+ procedures annually. Within that group, there's a meaningful skill gradient between a general ophthalmologist who does SLT and iridotomy in the office and a glaucoma fellowship-trained surgeon who does trabeculectomies and tube shunts.

**What to look for when choosing a specialist:**

- **Volume:** For operating-room glaucoma surgery (trabeculectomy, tube shunts), look for a surgeon doing at least 50 to 100 of these cases per year. SLT and iridotomy require less volume to stay sharp.
- **Fellowship training:** A one-year glaucoma fellowship after residency. Not required for SLT, but strongly preferred for trabeculectomy, shunts, and complex MIGS.
- **Board certification:** American Board of Ophthalmology. Verify at abop.org.
- **Device experience:** If your surgeon recommends a specific MIGS device, ask how many they've placed and what their complication rate is.
- **Second opinion threshold:** For any filtering surgery or tube shunt, a second opinion is worth the office visit copay. These decisions are not urgent and the surgery is not reversible.
- **Hospital affiliation:** For tube shunts, you want someone who regularly operates at a high-volume eye center, not an ambulatory surgery center that does mostly cataracts.

## How to shop for the best price

Glaucoma surgery pricing is negotiable in ways most patients don't realize, especially for uninsured or high-deductible commercial patients. Here's the playbook:

1. **Ask for a Good Faith Estimate.** Federal law (No Surprises Act, 2022) requires hospitals and surgery centers to give you a written estimate before a scheduled procedure if you're self-pay or request one. It must include the surgeon, facility, and anesthesia charges.
2. **Verify every billing party is in-network.** For operating-room cases, that means the surgeon, the facility, the anesthesiologist, and any pathology lab. One out-of-network anesthesiologist can tack $1,500 onto your bill.
3. **Compare ambulatory surgery center vs hospital outpatient.** For trabeculectomy, tube shunts, and canaloplasty, ASCs often run 30% to 50% less on facility fees. Ask your surgeon which settings they operate in and request the cheaper one.
4. **Ask about bundled pricing.** Some glaucoma centers offer a flat cash-pay rate that includes surgeon, facility, anesthesia, and the 90-day global period. That can save $2,000 to $5,000 versus itemized billing.
5. **Request the hospital charity-care or sliding-scale application.** Nonprofit hospitals are federally required to offer financial assistance. Thresholds are often 200% to 400% of federal poverty level.
6. **Get a second opinion on invasive procedures.** Before committing to trabeculectomy or a tube shunt, see a second glaucoma specialist. SLT, drop optimization, or a MIGS device might accomplish the same pressure goal with less risk.
7. **Confirm device brand and cost for MIGS or shunts.** Ask which implant your surgeon plans to use and whether there's a cheaper equivalent with similar outcomes. Device cost can swing $1,500 or more on commercial plans.

Red flags to watch for: vague quotes that say "$X and up," refusal to give itemized pricing, or unclear answers about which anesthesia group and pathology lab will be involved. Any of those should push you to call the billing office directly, or to a different facility.

## Surprise billing risks

Eye surgery bills rarely blow up the way an ER visit does, but glaucoma procedures have specific surprise-billing risks. The biggest ones for glaucoma surgery are anesthesia and facility fees. Anesthesia risk arises when the anesthesiologist is out-of-network even though the facility is in-network. Facility fee risk arises when an imaging or laser procedure is billed as a hospital outpatient visit rather than an office visit, which can 3x the charge. MIGS device costs sometimes appear as a separate line item on commercial plans and catch patients off guard.

**Most common surprise-billing sources:**

- **Out-of-network anesthesiologist** at an in-network surgery center
- **Hospital outpatient billing for in-office procedures** (some hospital-owned practices bill SLT or iridotomy as facility services, tripling the charge)
- **MIGS device charge** billed separately on commercial plans, $800 to $3,500
- **Pre-op testing** ordered at a hospital lab or imaging center rather than bundled in the office visit
- **Post-op complication visits** billed outside the 90-day global period

**If you get a surprise bill:**

- **Don't pay until verified.** Request an itemized bill and your insurance Explanation of Benefits side by side.
- **Check No Surprises Act protection.** For anesthesia or other ancillary providers you didn't choose, out-of-network charges at in-network facilities are typically prohibited. File a dispute at cms.gov/nosurprises.
- **Contact your state insurance commissioner** if the federal protections don't apply. Many states have additional surprise-billing laws.
- **Negotiate directly with the billing office.** Hospitals routinely discount self-pay balances 20% to 50% if you ask for the prompt-pay or hardship rate.

## Total recovery cost

Recovery varies more than almost any other glaucoma surgery variable. An SLT patient is back to normal activity the next morning. A tube shunt patient is on drops for 6 to 12 weeks, with multiple follow-ups and activity restrictions. Plan your budget and time off accordingly.

For SLT and iridotomy, expect one day of minor eye irritation and 1 to 2 follow-up visits. You can drive and return to work the next day. For trabeculectomy and tube shunts, expect 1 to 2 weeks off work (more if you do physical labor), no heavy lifting for 3 to 4 weeks, and weekly follow-ups for the first month. Vision is often blurrier than baseline for several weeks after filtering surgery while the eye settles.

**Add-on costs to budget for:**

- **Post-op drops:** Antibiotic, steroid, and sometimes pressure drops for 4 to 12 weeks. Typical total cost $40 to $300 with insurance, $100 to $500 cash.
- **Follow-up visits:** Included in the 90-day global period for surgery, but visual field testing or OCT imaging beyond that runs $100 to $300 per test on Medicare-allowed rates.
- **Time off work:** 1 day for SLT, 1 to 2 weeks for trabeculectomy or tube shunts. Factor in lost wages if you don't have PTO.
- **Transportation:** You cannot drive the day of operating-room surgery. Ride-share or family support for the first 24 to 48 hours.
- **Eye shield and supplies:** $10 to $40, usually included.
- **Revision risk:** 10% to 20% of trabeculectomy and tube shunt patients need a needling procedure or drop adjustment within the first year. Budget for the possibility.
- **Continued drops:** Some patients still need 1 to 2 drops even after surgery. Not a failure, just a partial response.

Realistically, the true episode cost for an operating-room glaucoma procedure runs 15% to 30% more than the surgeon's sticker price once you add facility, anesthesia, drops, and follow-up imaging. For SLT and in-office lasers, the sticker price is closer to the real total.

## Variants of this procedure

- Trabeculectomy
- SLT Laser Trabeculoplasty
- Canaloplasty (MIGS)
- Tube Shunt with Tissue Graft
- Tube Shunt (Ahmed/Baerveldt)
- Laser Cyclophotocoagulation
- Laser Iridotomy

## Frequently asked questions

### How much does glaucoma surgery cost with insurance?

On Medicare, you typically owe the $257 Part B deductible (2025 figure) plus 20% coinsurance. That works out to about $35 for SLT and $300 to $800 for a tube shunt including the facility fee share. Commercial insurance varies by plan, with most patients paying $500 to $3,500 out of pocket after deductible and coinsurance. Medicare Supplement plans usually cover the 20% coinsurance, leaving near-zero out of pocket.

### Does Medicare cover glaucoma surgery?

Yes, Medicare covers medically necessary glaucoma surgery, including SLT, trabeculectomy, tube shunts, MIGS, and laser iridotomy. Outpatient procedures are covered under Part B. You'll owe the Part B deductible and 20% coinsurance unless you have a Medigap plan. Some MIGS devices may require prior authorization on Medicare Advantage.

### How long is recovery from glaucoma surgery?

SLT and iridotomy recovery is essentially one day, with return to normal activity the next morning. Trabeculectomy and tube shunt recovery involves 1 to 2 weeks off work, no heavy lifting for 3 to 4 weeks, and weekly follow-ups for the first month. Vision can remain blurry for several weeks after filtering surgery.

### Is glaucoma surgery outpatient?

Yes. Every glaucoma surgery covered on this page is outpatient. You go home the same day, and no hospital stay is involved. In-office lasers take under 10 minutes, while operating-room cases like trabeculectomy or tube shunts are 45 to 90 minutes plus recovery time.

### What's the difference between SLT, trabeculectomy, MIGS, and a tube shunt?

SLT is a laser procedure done in the office that stimulates natural drainage, usually the first surgical step. Trabeculectomy is an operating-room procedure that creates a new drainage path under the eyelid. MIGS (like canaloplasty or iStent) is a minimally invasive procedure often combined with cataract surgery. Tube shunts implant a drainage device and are reserved for aggressive or advanced glaucoma where other options have failed.

### How do I avoid a surprise bill?

Request a Good Faith Estimate before surgery. Confirm that the surgeon, facility, anesthesiologist, and any pathology lab are all in-network. Ask whether MIGS devices are bundled or billed separately. If a surprise bill arrives, file a No Surprises Act dispute at cms.gov/nosurprises for out-of-network ancillary charges at in-network facilities.

### What's the cheapest way to get glaucoma surgery?

For surgical candidates, SLT laser is the cheapest option at roughly $35 Medicare coinsurance or $1,500 to $2,500 cash-pay. For operating-room procedures, an ambulatory surgery center typically runs 30% to 50% less than a hospital outpatient department on facility fees. Ask for bundled cash-pay pricing and hospital charity-care programs if uninsured.

### Where does this cost data come from?

The Medicare figures on this page come from the CMS Medicare Physician & Other Practitioners Public Use File, covering glaucoma surgery codes 65820, 65855, 66174, 66180, 66183, 66710, and 66761. Commercial and cash-pay ranges are estimated based on typical multiples of Medicare rates and public hospital chargemaster data. Your actual cost will depend on your specific plan, state, and facility.

## Related

- [All procedure cost concepts](https://ourhealthnetwork.com/procedure-costs)
- [Find specialists who perform this procedure](https://ourhealthnetwork.com/find-doctors)
- [Insurance plans that cover this procedure](https://ourhealthnetwork.com/tools/insurance-matcher)