CPT code 67228: Panretinal photocoagulation billing guide

CPT code 67228 is the procedure code for treatment of extensive or progressive retinopathy by photocoagulation, the panretinal scatter laser used in proliferative diabetic retinopathy. Medicare pays it once per eye per 10-day global period, at roughly $341 in the office and $254 in a facility.

Missing laterality modifiers, repeat sessions billed inside the global period, and unsupported ICD-10 pairings are the three most common reasons ophthalmology practices see 67228 denied. This guide covers the current descriptor, 2026 Medicare rates, modifiers, the 10-day global period, covered diagnoses, documentation, denials, and related retina codes.

This reference is written for ophthalmology and retina coders, billing managers, and practice owners. Reimbursement figures come from the 2026 Medicare Physician Fee Schedule (MPFS). Coverage rules follow Local Coverage Determination L33628 and its billing and coding article, A56550.

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Key takeaways

CPT code 67228 covers panretinal scatter photocoagulation for extensive or progressive retinopathy, such as proliferative diabetic retinopathy.

The code carries a 10-day global period, not 90 days. Medicare pays it once per eye per global period, however many sittings the course takes.

Every claim needs RT, LT, or 50. Claims without one are returned as unprocessable rather than denied.

The 2026 national Medicare rate is roughly $341 to $343 in the office and $254 to $255 in a facility, before any locality adjustment.

Practice management software like Pabau prompts for the laterality modifier and the paired ICD-10 code before the claim goes out.

CPT code 67228: definition and official descriptor

CPT code 67228 is defined by the American Medical Association (AMA) as “Treatment of extensive or progressive retinopathy (eg, diabetic retinopathy), photocoagulation.” The code sits in the Retina or Choroid Procedures subsection of the Surgery section, CPT 67000-67299. It covers panretinal photocoagulation (PRP), the scatter laser used to slow neovascularization in eyes with extensive or progressive retinopathy.

The descriptor changed on January 1, 2016. The phrase “one or more sessions” came out, and the global period dropped from 90 days to 10.

Older billing guides that treat 67228 as a 90-day major procedure describe rules retired a decade ago. The wording change did not loosen payment, though. Medicare still pays the code once per global period per eye.

Indications and covered ICD-10 diagnosis codes for 67228

Medicare coverage for CPT code 67228 is governed by Local Coverage Determination L33628 and its companion billing and coding article, A56550. The LCD covers PRP for proliferative and pre-proliferative retinopathies, and for severe diabetic macular edema associated with pre-proliferative disease.

Article A56550 carries the covered diagnosis list, which runs to roughly 275 ICD-10-CM codes. Check the pairing against our ICD-10-CM code reference before the claim is submitted.

The codes below are among those commonly used to support medical necessity for 67228. Each one is billable at full character length. Category-level codes such as E11.35 or H35.05 are not, and a claim built on one will reject. Check your own MAC article, since local lists differ.

Specificity matters on both halves of the claim. The diabetic retinopathy codes take a sixth character for laterality: 1 for right, 2 for left, 3 for bilateral, and 9 for unspecified. Pick the character that matches the eye named in the procedure note. Submitting a right-eye diagnosis against an LT line item is a routine denial trigger.

Medicare reimbursement rates for CPT code 67228 (2026)

The 2026 Medicare Physician Fee Schedule pays CPT code 67228 on relative value units (RVUs) multiplied by the CMS conversion factor. That national figure is then adjusted by the Geographic Practice Cost Index (GPCI) for the locality. Practices can pull locality figures from the CMS Physician Fee Schedule search tool.

How the 2026 rate is calculated

CY2026 is the first year with two conversion factors. Clinicians in a qualifying alternative payment model are paid at $33.5675, and everyone else at $33.4009. Multiplying the code’s total RVUs by the applicable factor gives the national rate, before the GPCI adjustment. The figures below reconcile directly to the CMS RVU file, so you can check them yourself.

Facility vs non-facility rates

Where the laser is delivered changes what the practice collects. The non-facility rate applies in the physician’s office, where the practice carries the equipment and staffing cost. The facility rate applies at an ambulatory surgery center or hospital outpatient department, because the facility bills separately for room, equipment, and clinical staff.

Both figures are national averages and shift with locality. Use your MAC’s GPCI adjustment when projecting collections. Place of service decides which column applies, so the POS code on the encounter has to match where the laser was delivered.

Modifiers that belong on a 67228 claim

CPT code 67228 takes a small set of modifiers, and two of them are mandatory. Article A56550 states that claims submitted without RT, LT, or 50 are returned as unprocessable under section 1833(e). A returned claim carries no appeal rights, so the practice corrects the line and resubmits. Solid denial management workflows catch these before they age.

Bilateral PRP: using modifier 50, LT, and RT

Payer rules for bilateral PRP differ. Medicare generally accepts modifier 50 on a single 67228 line and pays 150% of the unilateral rate. Many commercial payers want two line items instead: one with LT and one with RT, each at 100%. PRP is usually staged one eye at a time, so same-session bilateral treatment is the exception.

• Check the payer’s billing manual before defaulting to modifier 50 on a commercial claim.
• When billing separate LT and RT lines, attach the matching laterality-specific ICD-10 code to each line.
• Never put modifier 50 and RT or LT on the same line. Pick one method per payer policy.
• Confirm the authorization covers both eyes if the payer issues separate approvals per eye.

Confirming bilateral coverage before the procedure date, and capturing the authorization number for each eye, prevents the most common denial pattern on bilateral 67228 claims.

How the 10-day global period works

CPT code 67228 carries a 10-day global period under Medicare, shown as global indicator 010 in the Physician Fee Schedule. CMS reclassified 67228 as a minor procedure at the start of 2016, retiring the 90-day period that older guides still quote.

For 10 days from the date of service, related follow-up care for that eye is included in the original payment. Commercial and Medicare Advantage plans can set their own period, so confirm the term in each contract rather than assuming 10 days everywhere.

The short window has a practical consequence for retina practices. Post-laser checks inside those 10 days are not separately billable for the treated eye. An unrelated visit in the same window can still be billed with modifier 24 if the note supports it.

Billing staged PRP sessions correctly

A full PRP course runs to roughly 1,500 to 2,000 laser spots per eye and is often delivered over two or more sittings. Only the first of those sittings is separately payable inside the global period. Article A56550 puts it plainly. Payment may be made only once during the global period of the initial procedure.

There is no modifier that changes this. Appending 58, 76, or 79 to a second same-diagnosis 67228 on the same eye inside the 10 days does not make it payable. Billing it that way invites a refund request on audit. The timeline below shows which sittings survive that rule.

1. Record the treatment plan at the first session. Note the extent of the retinopathy and the number of sittings the course is expected to take.
2. Bill the first session with RT or LT. One unit, one eye, with the laterality-matched ICD-10 code on the line.
3. Hold any further session for the same eye until day 11 or later. Sessions inside the window are paid through the first claim, whatever modifier is attached.
4. Bill the post-window session as a fresh procedure. It needs its own RT or LT and starts its own 10-day period.
5. Treat the second eye on its own footing. The fellow eye has a separate global period, so laterality on every line is what keeps the two apart.
6. Reserve modifier 79 for a different procedure. It applies when an unrelated ophthalmic procedure falls in the window, never to another PRP on the treated eye.

Documentation requirements for panretinal photocoagulation billing

LCD L33628 sets out the clinical documentation a retina practice needs to support medical necessity for CPT code 67228. MAC auditors review these claims regularly, and high-volume retina practices see the most scrutiny. Every 67228 chart should carry each element below.

• Diagnosis supporting extensive or progressive retinopathy. Record the fundus findings that meet the threshold: proliferative diabetic retinopathy, high-risk PDR features, or equivalent neovascular activity on exam or imaging.
• Eye treated. Name the right eye, the left eye, or both. The note must agree with the laterality modifier on the claim.
• Number of laser applications and area treated. Document the approximate spot count and the quadrants covered. Auditors use this to confirm the treatment was genuinely panretinal.
• Prior treatment history. For a later session, note the previous PRP and the clinical reason for more treatment, such as residual neovascularization on follow-up angiography.
• Dates of earlier sessions. The chart should make the interval since the last 67228 on that eye easy to read. That interval decides whether the session is payable.
• Patient response and follow-up plan. Record the treatment goal, the sittings still planned, and the next appointment.

A missing element turns a clean claim into an appeal or a write-off. Practices that use structured note templates for PRP see fewer pre-payment review requests.

Why 67228 claims get denied

Most 67228 rejections trace back to five causes, and four of them are fixable at the point of charge entry. The table pairs each one with the trigger and the correction.

Stale rules cause the sixth problem, and it is the expensive one. A practice still working from 90-day global period guidance will hold legitimate day-15 sessions it could have billed, and will submit day-5 sessions it cannot. Both errors cost money in opposite directions.

Related CPT codes for retina procedures

Choosing 67228 over a neighboring code, or missing a legitimate companion code, drives both undercoding and overcoding in retina practices. The table compares 67228 with the codes coders weigh against it most often. The AAPC Codify CPT lookup is a useful reference for adjacent ranges.

The 67210 comparison is the one that trips coders up. Both codes describe retinal photocoagulation, but 67210 still bundles repeat sittings across a 90-day window, while 67228 bundles them across 10 days.

The 67145 line matters too. Prophylactic treatment does not meet the extensive or progressive threshold that defines 67228. Documenting the stage and severity at the time of treatment is what supports the code you pick.

How Pabau supports retina billing workflows

Retina practices billing CPT code 67228 work with a narrow margin for error. A 10-day global period, mandatory laterality modifiers, six-character ICD-10 requirements, and same-day injection rules all land on one claim. A single overlooked field becomes a denial or an audit finding.

Pabau is practice management software with claims handling built in. Its billing tools for ophthalmology replace manual code entry with a structured charge screen, so the laterality modifier is prompted rather than remembered.

Claims reach US payers through Claim.MD, our clearinghouse partner, and eligibility checks run before the procedure date. ERA processing then posts payments against open claims, so nobody is matching remittances to invoices by hand.

The built-in CPT and ICD-10-CM catalogues let a coder pick 67228, its laterality modifier, and the matching retinopathy code from one encounter screen. Past procedures stay on the patient record with their dates, so the team can see whether a second PRP session falls inside the 10-day window.

Reduce 67228 claim denials with smarter billing workflows

Pabau’s claims management tools help retina and ophthalmology practices submit CPT code 67228 correctly the first time. The right modifiers, paired ICD-10 codes, and documentation are all in place before the claim goes out. Fewer denials. Faster collections.

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Conclusion

CPT code 67228 changed in 2016, and a lot of billing guidance never caught up. The descriptor no longer says “one or more sessions.” The global period is 10 days rather than 90, and the national office rate sits near $341.

Payment still lands once per eye per global period, and no modifier moves that line. Four habits clear most 67228 denials. Put laterality on every claim and use a billable six-character diagnosis. Document the spot count and treated area, then hold any repeat session until the 10 days close.

To see how Pabau builds retina claims with modifier prompts and paired ICD-10 codes, book a demo with the team.

Continue your research

Need to understand how claims reach payers? Medical claims clearinghouse guide explains how electronic claim routing works and what to look for in a clearinghouse partner.

Want to reduce claim rejections before they happen? Claim.MD clearinghouse overview covers how Pabau’s integrated clearinghouse handles 837P submissions, eligibility checks, and ERA processing.

Billing the imaging that documents the retinopathy? CPT code 92134 covers retinal OCT, the scan retina practices run alongside laser treatment.

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