What TPA, Orals and Legend Drug Certificates Mean From State to State

Every state lets optometrists use diagnostic drops, and nearly every state now lets them prescribe for eye disease. What differs is how the authority is packaged. Some states fold it into the license. Others issue it as a separate certificate with its own letters, fee and renewal. And a few draw a line between topical drugs and oral medications, which is where "orals" comes from. When you license in another state, the new board reads your file against its packaging, not yours.

What do DPA and TPA mean?

DPA (diagnostic pharmaceutical agents) covers drops used to examine the eye, such as dilating agents. TPA (therapeutic pharmaceutical agents) covers drugs used to treat disease. Many states still print the letters on the license:

• New York issues a DPA certificate ($60 on the license application; graduates of accredited programs after Jan. 1, 1984 check a box). TPA comes in two phases, shown as "U" (phase one) and "V" (phase two). Graduates after Jan. 1, 1993 who passed TMOD apply for TPA on the license application; earlier graduates go through SUNY College of Optometry. TPA holders complete 36 CE contact hours in each three-year registration period.
• District of Columbia treats DPA and TPA as authorities on the license. DPA comes automatically with TPA, and both require a board-approved pharmacology course and TMOD.
• Michigan issues DPA and TPA certifications alongside the license, $82.60 each or $143.20 together as of October 2026.
• Nebraska issues diagnostic and therapeutic certifications with the license for $10 each.
• New Jersey issues TPA certification with its own initial and biennial fee ($250 each), and requires 30 of the 50 biennial CE credits in TPA topics, 10 of them in oral TPA.

Why do "orals" get singled out?

Older therapeutic laws often allowed topical drugs first and oral medications later, so some states still check oral prescribing separately.

• Illinois requires every applicant to qualify for diagnostic, topical therapeutic and oral therapeutic authority. An applicant from a state without oral prescribing documents that training separately, whether applying by Acceptance of Examination or by Endorsement ($500 either way).
• Washington requires DPA/TPA, oral medication and epinephrine-injection qualifications for licensure, verified by the applicant's school.
• South Carolina limits oral agents to antihistamines, antimicrobials, antiglaucoma drugs, over-the-counter drugs and analgesics for ocular conditions (S.C. Code 40-37-310).

What is a legend drug certificate?

"Legend drug" means a prescription drug. Indiana requires a separate Optometric Legend Drug Certificate to prescribe. It costs $20, requires ocular pharmacology education and TMOD, and expires with the license on April 1 of even years, so the two renew together. Indiana also issues a Controlled Substances Registration for optometrists limited to tramadol. Minnesota takes the opposite approach: one license covers DPA and TPA, and every licensee meets legend drug standards, which are 100 hours of study, supervised clinical experience and TMOD. See Indiana licensing and the legend drug certificate.

Which states use their own names?

• Nevada: OPAC, the pharmaceutical agents certificate formerly called TPA, with glaucoma as a separate certificate.
• Oregon: AT (topical and non-topical agents) is the minimum on every new license; ATI adds injections after a board-approved injection course.
• Idaho: the license prefix shows the level. OD has neither diagnostic nor therapeutic privileges, ODD has diagnostic only, and ODP has both.
• Florida: since 1986 every new licensee must qualify as a Certified Optometrist, which includes 110 hours of ocular pharmacology training and a year of supervised experience diagnosing eye disease.
• Arkansas: optometric physician certification requires a 100-hour internship under a board-certified ophthalmologist, recorded in the board's logbook.
• Kentucky: graduates of schools that have not confirmed Expanded Therapeutic Procedures coursework finish a 32-hour ETP course before their second renewal.

Where does the preceptorship surprise people?

Hawaii. TPA certification there needs TMOD, a 100-hour ocular disease course (school verification works for graduates after 1997) and a 100-hour preceptorship under an ophthalmologist; the certification fee is $42. An optometrist who has prescribed for years elsewhere can still be held up by the preceptorship. Arkansas's 100-hour internship log works the same way. Plan either one before the move, not after.

How does a board decide whether your authority matches?

Most boards look at three things: your NBEO record (TMOD above all, since most states require it for TPA), your school's pharmacology curriculum, and the certification you hold now. Graduation year often decides it. New York's TPA path splits at 1993, Hawaii's course verification at 1997, Florida's certified optometrist rule at 1986, and Alabama requires a 72-hour therapeutics course of anyone licensed before Oct. 1, 1994.

Some states set a floor for everyone. Delaware issues only therapeutic licenses, Missouri requires every applicant to qualify for TPA, New Mexico folds TPA into every license, and Minnesota requires legend drug standards of all licensees. Others ask for the highest level you hold at home: Michigan wants therapeutic certification at the highest level authorized where you practice now, and Alaska wants practice at the highest therapeutic level of your jurisdiction. When your home state's scope is narrower than the new state's floor, read when your home state's scope is narrower.

Does a therapeutic certificate cover controlled substances?

Not by itself. Controlled substance authority usually needs a DEA registration for each state, and several states add their own license: Illinois, Michigan, Rhode Island, South Dakota, Utah and Delaware among them. Massachusetts limits optometrists to Schedule VI prescription drugs and requires registration under M.G.L. c. 94C. See state controlled substance licenses for optometrists and DEA registration in more than one state.

How do we handle certifications?

The readiness review ($149) maps your current authority, NBEO record and graduation year against the target state's tiers. Our Therapeutic, Glaucoma or Legend Drug Certification Add-On is $249 per certification, filed with the license ($699 per state): we gather transcripts, course records, TMOD score reports and preceptor logs, and track the file, while you complete and sign each application. See pricing or the state license index.