CPT (Current Procedural Terminology) codes are five-digit numbers that describe every medical service or procedure. Your doctor, hospital, and insurance company use them to communicate exactly what was done. Every line on your medical bill has a CPT code, and knowing the code lets you look up what Medicare pays for that same service.

Why do providers charge so much more than Medicare pays?

Providers set their own "chargemaster" prices, which are essentially list prices. Medicare pays a fixed rate based on the resources each service actually requires (the RVU system for procedures, or the Clinical Lab Fee Schedule for lab tests). Commercial insurers typically pay 150% to 250% of Medicare rates. Uninsured patients are often billed the full chargemaster price, which can be 2x to 30x what Medicare pays.

Can I use Medicare rates to negotiate my bill?

Yes. Medicare rates are the closest thing to a "fair price" benchmark in U.S. healthcare. When negotiating, ask the provider what they accept from Medicare for the same CPT code. Most providers will accept 150% to 200% of Medicare for cash-pay patients, which is still far less than their chargemaster price. Many hospital financial assistance policies also use a multiple of Medicare as their discount floor.

How are Medicare rates calculated?

For most procedures, Medicare uses the Resource-Based Relative Value Scale (RBRVS). Each CPT code gets three RVU components: Work (physician time and skill), Practice Expense (overhead), and Malpractice. These are multiplied by geographic adjustment factors (GPCIs) and a conversion factor ($33.4009 in 2026). Lab tests (80000-89999 range) use a separate Clinical Laboratory Fee Schedule with flat national rates.

CPT 92136

Ophthalmic Biometry (Corneal Curvature and Eye Depth Measurement)

CPT 92136 is an automated eye measurement performed before cataract surgery to determine the correct intraocular lens (IOL) power. The scan takes less than a minute, but providers charge an average of $155.31 for it. Medicare pays $48.10 (a 3.2x markup). This measurement is billed as a separate charge on top of the pre-operative eye exam, the cataract surgery itself, and any premium IOL upgrade fees.

Updated May 2026Source: CMS Physician Fee Schedule

CPT 92136 at a Glance

Average provider charge: $155.31
Medicare rate (office): $48.10
Medicare rate (facility): $48.10
Typical markup: 3.2x over Medicare rate

Procedure time: Under 1 minute (automated scan)
Purpose: IOL power calculation for cataract surgery
Setting: Ophthalmology office
Beneficiaries (2023): 1,000,180

How the Medicare Rate Is Calculated

Medicare values every procedure using Relative Value Units (RVUs) across three components, then multiplies by a national conversion factor of $33.4009 (2026). Here is the exact math for CPT 92136:

Component	What It Covers	Office (Non-Facility)	Hospital (Facility)
Work RVU	Physician time, skill, and judgment	0.31	0.31
Practice Expense RVU	Equipment, staff, supplies	1.05	1.05
Malpractice RVU	Professional liability insurance	0.02	0.02
Total RVU		1.38	1.38
x $33.4009	2026 conversion factor	$48.10	$48.10

Note: The office and facility rates are identical for 92136 because the practice expense RVU does not change between settings. This is unusual. Most procedures pay less in a facility setting because the hospital covers overhead costs separately.

Medicare Rate by State

Medicare adjusts the national rate by location using Geographic Practice Cost Indices (GPCIs). Here is how the 92136 rate varies across states:

Medicare Rate by State (2026)

Medicare adjusts payments by location using Geographic Practice Cost Indices (GPCIs). Select your state to see the adjusted rate.

Sample State Rates

State	Medicare Pays	Avg. Charge	Markup
Texas (Austin)	$39.71	$155.31	3.9x
California (Los Angeles)	$41.32	$155.31	3.8x
New York (Manhattan)	$41.55	$155.31	3.7x
Florida (Fort Lauderdale)	$39.82	$155.31	3.9x
Ohio	$37.59	$155.31	4.1x
Mississippi	$36.27	$155.31	4.3x
Arkansas	$36.09	$155.31	4.3x
Alaska	$44.27	$155.31	3.5x

Rates shown use 2026 GPCIs and the $33.4009 conversion factor. The average provider charge of $155.31 is the 2023 national average from CMS utilization data. Actual charges vary by provider.

The Full Cost Stack for Cataract Surgery

Biometry (92136) is just one piece of a larger billing picture. Patients having cataract surgery often don't realize how many separate charges accumulate. Here is a typical breakdown for one eye:

Service	CPT Code	Avg. Charge	Notes
Pre-op eye exam	92004/92014	$200 to $350	Comprehensive exam to confirm cataract diagnosis
Biometry (this code)	92136	$155	IOL power calculation
Cataract surgery	66984	$3,500 to $5,000	Surgeon fee + facility fee
Anesthesia	00142	$300 to $600	Typically topical or monitored sedation
Premium IOL upgrade (if chosen)	V2632	$1,000 to $3,000	Out-of-pocket, not covered by insurance
Post-op visits (included in 90-day global)		$0	Bundled into the surgery fee

Premium IOL vs. standard: If you choose a premium lens (multifocal, toric for astigmatism, or extended depth of focus), the biometry measurement itself is still covered by insurance. However, the premium lens and any additional laser fees are entirely out-of-pocket, typically $1,000 to $3,000 per eye. A standard monofocal IOL is fully covered.

Common Billing Problems with 92136

Billed separately when it should be bundled

Some practices bill 92136 on the same date as cataract surgery. While it is typically performed during a separate pre-operative visit, if your biometry was done the same day as surgery and billed separately, check whether it should have been bundled. The National Correct Coding Initiative (NCCI) edits do allow separate billing in most cases, but verify the dates on your Explanation of Benefits match the actual service date.

Repeated measurements billed multiple times

If the initial measurement is unclear or the surgeon wants a second reading, some offices bill 92136 twice. Medicare allows only one unit per eye per surgical episode. If you see two charges for 92136 on the same eye before the same surgery, this may be an error.

High self-pay charges relative to the procedure

At $155 average charge for a sub-60-second automated scan, the markup is steep. If you are paying out-of-pocket or have a high deductible, ask the ophthalmology office for their cash-pay rate. Many will accept Medicare-level payment ($48) or a modest premium over it for self-pay patients. This is especially worthwhile because biometry is performed at a separate visit from surgery, so you can negotiate before committing.

Frequently Asked Questions

What is CPT 92136 and when is it performed?

CPT 92136 is ophthalmic biometry, an automated measurement of your corneal curvature and eye depth. It is performed before cataract surgery to calculate the correct intraocular lens (IOL) power. The scan itself takes less than a minute and is painless. It is typically done during a pre-operative visit, separate from the surgery date.

How much does ophthalmic biometry (92136) cost?

The national average provider charge is $155.31. Medicare pays $48.10 for this procedure. If you have commercial insurance, your plan's negotiated rate is likely between $50 and $120. Your out-of-pocket cost depends on whether you've met your deductible. If paying cash, ask for the self-pay rate, as many offices will discount significantly from the $155 sticker price.

Is ophthalmic biometry covered by insurance?

Yes, when performed as part of medically necessary cataract surgery planning. Medicare and most commercial plans cover 92136. However, if you choose a premium or toric IOL (for astigmatism correction), the biometry is still covered but the premium lens itself ($1,000 to $3,000 per eye) is typically your responsibility.

Why is biometry billed separately from cataract surgery?

Biometry is a distinct diagnostic service performed before surgery to determine which lens to implant. It is typically done at a separate pre-operative visit. Because it involves different equipment, different timing, and a different clinical purpose than the surgery itself (CPT 66984), it has its own billing code. Think of it like the blueprint measurement before building a house: related to the project, but a separate service.

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