How to Find a Doctor Who Can Prescribe Zirgan Near You [2026 Guide]

Zirgan (ganciclovir ophthalmic gel 0.15%) is a prescription-only medication for acute herpetic keratitis — a corneal infection caused by the herpes simplex virus. You cannot get it over the counter, and not every doctor can diagnose or properly manage herpetic eye disease. This guide explains who can prescribe Zirgan, when to seek care, and how to find the right provider near you.

Which Doctors Can Prescribe Zirgan?

Zirgan is not a controlled substance, so it can be prescribed by any licensed healthcare provider authorized to prescribe medications in your state. However, because herpetic keratitis requires a slit-lamp examination to diagnose properly, the following providers are most appropriate:

Ophthalmologists (MD/DO): Eye physicians and surgeons who specialize in medical and surgical eye care. They are the most qualified to diagnose and manage herpetic keratitis and all its complications.

Optometrists (OD): Optometrists are trained to diagnose and manage ocular disease in most states, including herpetic keratitis. They use slit-lamp examination to identify dendritic ulcers and can prescribe Zirgan. Prescribing scope varies slightly by state.

Cornea specialists: For complex or recurrent herpetic keratitis with stromal involvement, a cornea subspecialist (an ophthalmologist with fellowship training in cornea) may be appropriate.

Emergency physicians and urgent care providers: ER doctors or urgent care providers may prescribe antiviral eye treatment if they have slit-lamp capability, but they will often refer to an eye specialist for confirmed or complex cases.

Why Can't My Primary Care Doctor Prescribe Zirgan?

Technically, primary care physicians can write a Zirgan prescription. The challenge is diagnosis — herpetic keratitis must be confirmed by slit-lamp examination, which is specialized equipment that most primary care offices don't have. A misdiagnosis of an HSV corneal infection can lead to inappropriate treatment that worsens the condition, especially if steroids are given without antiviral coverage.

If you present to your PCP with eye pain, photophobia, and redness, the safest referral is to an ophthalmologist or optometrist for proper diagnosis before any prescription is written.

When Should I Seek Care for a Potential Herpes Eye Infection?

Seek eye care promptly — ideally same-day or next-day — if you experience:

Eye pain or a foreign body sensation

Photophobia (sensitivity to light)

Redness and watering of the eye without obvious explanation

Blurred vision in one eye

Cold sore or facial tingling preceding eye symptoms (classic prodrome of HSV reactivation)

Herpetic keratitis progresses quickly. Delays of even a few days can allow the virus to penetrate deeper corneal layers, increasing the risk of scarring and permanent vision loss.

How to Find an Ophthalmologist or Optometrist Near You

Here are the best resources for finding an eye care provider near you:

American Academy of Ophthalmology (aao.org/find-an-ophthalmologist): Official directory of board-certified ophthalmologists. You can filter by specialty and location.

American Optometric Association (aoa.org): Directory of licensed optometrists nationwide. Most ODs can diagnose and treat herpetic keratitis.

Your insurance carrier's online directory: Check in-network ophthalmologists and optometrists on your insurance plan's website to minimize out-of-pocket costs.

Urgent care and ER (for emergencies): If you are experiencing severe eye pain, sudden vision loss, or cannot wait for an appointment, go to an emergency room or urgent care with slit-lamp capability immediately.

Is Telehealth an Option for Zirgan?

Telehealth is generally not appropriate for the initial diagnosis of herpetic keratitis. Diagnosing a dendritic ulcer requires fluorescein staining and slit-lamp examination — equipment that cannot be replicated over video. However, for patients with a confirmed prior diagnosis of recurrent HSV keratitis who recognize their symptoms, some eye care providers may be comfortable prescribing a refill via telehealth. This should only be done with an established provider who knows your history.

Once You Have a Prescription — Finding Zirgan in Stock

Once you have a prescription, finding a pharmacy with Zirgan in stock can be its own challenge. Use medfinder to locate pharmacies near you with Zirgan available. Read more in: How to Find Zirgan In Stock Near You.