Most U.S. states authorize drivers with documented photosensitive medical conditions to install window tint darker than the standard VLT minimum. The process varies — some states issue a formal DMV permit, others rely on a signed physician letter carried in the vehicle, and a few have no medical exemption at all. This guide walks through the qualifying conditions, the typical application workflow, and the key state-by-state differences.
For the specific process in your state, see our medical exemption directory.
What a medical exemption actually does
A medical tint exemption is an authorization — a DMV-issued permit, a physician-signed certificate, or a combination — that lets the driver install tint below the state’s VLT minimum on specified windows. It does not usually waive reflectivity rules, color restrictions, or the windshield AS-1 requirement.
The exemption travels with the vehicle, not the driver, in most states. If the vehicle is sold, the tint usually has to be removed or the new owner has to document their own qualifying condition.
Conditions that commonly qualify
Every state keeps its own list, but the conditions below are accepted in nearly every state that offers an exemption. Approval is case-by-case and depends on a licensed physician’s certification.
- Systemic lupus erythematosus (SLE) — the most commonly cited qualifying autoimmune condition. Sunlight exposure is a documented disease trigger per the Lupus Foundation of America.
- Xeroderma pigmentosum (XP) — a rare genetic disorder causing extreme UV sensitivity, documented in the NIH GARD database.
- Porphyria (including erythropoietic protoporphyria, EPP) — per the American Porphyria Foundation.
- Melanoma history or recurrent skin cancer — post-treatment photosensitivity.
- Severe photosensitivity reactions — sometimes drug-induced (e.g., tetracycline class, certain diuretics).
- Bullous pemphigoid and other photosensitive dermatoses.
- Keratoconus, cataracts, or other post-surgical eye sensitivity — typically documented by an ophthalmologist.
- Albinism — reduced melanin results in extreme UV and glare sensitivity.
The four state approaches to medical exemptions
Formal DMV permit required
States that require formal pre-approval from the DMV, DPS, or state police before installation include New York, North Carolina, Pennsylvania, Maryland, and several others. In these states you submit a physician-certified form and wait for the permit before tinting.
Physician letter carried in vehicle
Several states accept a letter from a licensed physician or ophthalmologist certifying the medical need for darker tint. The letter is carried in the vehicle and produced on request. Examples include California and Arizona.
Hybrid: permit + sticker
Some states issue a physical exemption decal or certification sticker that is placed on the windshield or rear window. Virginia and West Virginia are common examples.
No formal exemption
A minority of states do not offer a formal medical exemption. In these states, officers may exercise discretion when presented with a physician’s note, but there is no statutory protection.
Typical application workflow
- Obtain a signed certification from a licensed physician, optometrist, or ophthalmologist stating the diagnosis and the medical necessity for reduced UV/visible-light exposure.
- Complete the state-specific form. Many forms are downloadable directly from the state DMV or DPS website — see each state page for the form link.
- Submit the form and physician certification to the issuing agency (in person, by mail, or electronically where allowed).
- Wait for approval. In pre-approval states this is mandatory; in letter-only states there is no wait.
- Install film only after the approval is in hand. Installing before approval risks a ticket and film-removal costs.
- Carry the approved paperwork and any required decal in the vehicle at all times.
- Renew before expiration. Many states require annual or biennial renewal with an updated physician signature.
Can a doctor in another state sign my exemption?
Most states require the certifying physician to be licensed in the state issuing the exemption, or to hold a valid license in the United States generally. New York and Pennsylvania are strict about in-state licensure. Arizona and California are more permissive.
Online telehealth evaluations with a licensed provider have become more common. If your state allows remote physician certification, services like our partner MyEyeRx (referenced on our medical exemption hub) can connect you with a licensed provider for evaluation. Approval is always dependent on the actual medical history.
What the exemption does NOT waive
- Reflectivity limits — still enforced in most states.
- Color-tint restrictions (no red, amber, yellow, or blue tint in most states).
- Windshield AS-1 / top-strip rules — the exemption usually applies to side and rear windows only.
- Mirror requirement when rear visibility is reduced.
Medical tint exemptions: the system behind the paperwork
Why the exemption exists: photosensitivity is real
Photosensitivity is a measurable, diagnosable condition, not a convenience label. In systemic lupus erythematosus, UVA exposure can trigger cutaneous flares and, in severe cases, systemic disease activity within hours. The Lupus Foundation of America documents roughly two-thirds of lupus patients reporting UV sensitivity.
In porphyria cutanea tarda and the rarer erythropoietic protoporphyria, UVA exposure causes painful burning within minutes and can progress to blistering and scarring. In xeroderma pigmentosum (XP), UV-induced DNA damage goes unrepaired, resulting in a thousand-fold elevated skin-cancer risk. Patients with XP and severe porphyria literally cannot spend daytime in a car with factory glass.
Because side-window glass blocks roughly 37% of UVA (vs. 96% for laminated windshields), the car is a significant UVA exposure source for photosensitive drivers. Medical tint exemptions exist to close that gap by permitting UVA-blocking ceramic film below the normal state VLT minimum.
The four permit systems you’ll encounter
Not every state issues a physical DMV permit. Depending on where you live, your medical tint exemption will come through one of four structures:
| System | How it works | Example states |
|---|---|---|
| DMV permit + dashboard sticker | Formal DMV application; approved exemption carries a VIN-specific sticker | Texas, Arizona, Florida, Illinois |
| State police or DPS approval | Physician letter submitted to state police; approval letter returned | Alabama, Virginia, Wisconsin |
| Physician letter in vehicle (no state issuance) | No DMV involvement; carry signed physician letter with VIN + condition | California, Utah, Colorado |
| No exemption available | State law does not recognise medical tint exemption | New Jersey, Vermont (historically) |
What good physician documentation looks like
Regardless of which system your state uses, the physician letter is the centerpiece. A letter that gets approved usually includes:
- Patient identification — full name, DOB, address matching the registration.
- Vehicle identification — make, model, year, VIN. (Some states; not all.)
- Diagnosis — ICD-10 code + plain-language description.
- Connection to sun/UV exposure — explicit clinical statement that UVA or visible-light exposure exacerbates the condition.
- Recommended VLT — the physician states the minimum VLT needed (e.g., "VLT of 20% or lower is medically necessary").
- Windows covered — some states accept front sides only; others permit windshield below AS-1 under medical exemption.
- Physician credentials — name, state license number, NPI, office address, and signature with date.
- Validity period — typically one to four years before re-certification.
Enforcement: what happens at the traffic stop
An exemption does not prevent the initial stop — the officer usually cannot tell your tint is exempt until after they meter it and ask. The workflow at most U.S. traffic stops is:
- 1. Officer observes apparently dark tint.
- 2. Traffic stop initiated (usually for a pretext: speeding, lane change, equipment).
- 3. Officer meters one or more windows.
- 4. VLT reads below state minimum.
- 5. Officer asks if you have a medical exemption. This is where you present the paperwork.
- 6. Officer either accepts exemption or issues a citation. If cited, you present the paperwork in traffic court.
Medical window tint exemptions — FAQ
Does a medical exemption waive all tint rules?
Usually no. Reflectivity limits, color restrictions, and windshield rules still apply even when darker film is permitted on side and rear windows.
Can I get a medical tint exemption online?
Some states allow online physician evaluations and electronic submission of forms. Approval is never guaranteed and depends on your medical history and state agency rules.
How long does a medical tint exemption last?
It varies by state. Common terms are 1 year (New York), 2 years (Pennsylvania), 5 years, or permanent (California letter). Always check the state page for renewal timing.
Do passengers qualify?
Most states issue the exemption to the driver who owns or primarily operates the vehicle, based on that person’s medical condition. A few states permit an exemption for a regular passenger’s condition with supporting documentation.
What happens if I move states with an approved exemption?
Exemptions do not transfer between states. If you move, you must apply again under the new state’s rules (and potentially re-tint the vehicle to comply).
Sources & references
How we verified this guide
- Primary sources only. VLT limits, windshield rules, and medical exemption procedures cited in this guide are verified against each state’s statute, administrative code, or DMV publication. See our sources & methodology.
- Annual re-review. Every guide is re-read against current state law at least once a year. This page was last reviewed on January 15, 2026.
- No affiliate influence. Our rankings, recommendations, and ticket-fighting advice are never paid. See our editorial policy.
- Not legal or medical advice. Enforcement is fact-specific; always verify with your local DMV, your state statute, or a licensed attorney before acting. See the legal disclaimer and medical disclaimer.
- Report an error. Spot something wrong or outdated? Contact our editors — we publish corrections quickly and note them in our next review cycle.