Professionally qualified ASL interpreters on site, nationwide.
Sign language interpreting connects Deaf and hearing people in real time: an ASL interpreter signs what is spoken and voices what is signed. Prism Linguistics provides professionally qualified, background-checked ASL interpreters on site across the United States, with 24/7 scheduling and a quote reply within 60 minutes during business hours.
Most bookings reach us because of the Americans with Disabilities Act — a hospital scheduling a Deaf patient, an HR team preparing a disciplinary meeting, a school district setting up an IEP review. One warning: qualified ASL interpreters are a small pool, so book earlier than you would for a spoken language.
Last reviewed August 23, 2026 by the Prism Linguistics editorial team.
An ASL interpreter works live, with no chance to go back and fix a line. They position themselves where the Deaf person can watch them and the speaker at once, usually beside the doctor or the judge, and they interpret everything said in the room, including the aside to a colleague. That is the point. A Deaf patient or employee should get the same conversation a hearing person gets, not a summary of it.
American Sign Language is a full language of its own, with grammar and word order unrelated to English; facial expression carries grammar, not just mood. A Deaf person whose first language is ASL may not read written English fluently, so handing over a printed form is not the same as providing access. If you have an agenda, a case caption or a list of technical terms, send it ahead so the interpreter can prepare.
Interpreters are matched to the room, not just the language.
ER intakes, consultations, informed consent and discharge planning, with interpreters used to clinical pace. Part of our healthcare interpreting services.
Hearings, depositions, attorney-client meetings and probation appointments, staffed through our legal interpreting services with court-experienced interpreters.
IEP and 504 reviews, parent-teacher conferences, enrollment meetings and graduation ceremonies, so Deaf parents and students take part rather than watch.
Interviews, onboarding, performance reviews, safety training and all-hands meetings, arranged through our business interpreting services.
Stage interpreting for keynotes, panels and breakouts, usually as a team of two, alongside our spoken-language conference interpreting.
Town halls, DMV and SSA appointments, public consultations and press briefings, positioned and lit so the audience sees speaker and interpreter together.
The Americans with Disabilities Act requires businesses that serve the public (Title III) and state and local government services (Title II) to communicate as effectively with Deaf and hard-of-hearing people as they do with everyone else. The law calls an interpreter an auxiliary aid, and for anything long, complex or consequential, a qualified interpreter is usually the aid that works. Passing notes gets a coffee order right; it does not get informed consent for surgery.
A few points surprise first-time bookers. The cost belongs to the business or agency, not the Deaf person, and it cannot be passed on as a surcharge. Public entities must give primary consideration to the communication method the Deaf person asks for. A family member is not an acceptable substitute in most situations, and children never are outside a genuine emergency. Healthcare providers carry parallel duties under Section 504 and Section 1557 of the ACA.
We are an interpreting agency, not a law firm: treat this as orientation, not legal advice. What we can do is have a qualified interpreter at your site when the appointment starts.
Certification means an independent body has tested the interpreter, not just that they sign well. These are the credentials worth asking about:
Our interpreters are professionally qualified and background-checked, and certified where the setting requires it: a court assignment gets a legally qualified interpreter, a hospital gets one experienced in clinical work.
Not everyone who is Deaf or hard of hearing uses ASL. Some people who lost their hearing later in life prefer signed English or another visual system that follows English word order. DeafBlind people may use tactile interpreting, where signs are followed by touch, at the pace the person sets. In some assignments a Certified Deaf Interpreter teams with the hearing interpreter to bridge non-standard language use.
The fix: ask the person how they prefer to communicate and put the answer on the booking. Where the answer turns out to be a spoken language, we cover 326 of those through our face-to-face interpreting service.
We schedule on-site ASL interpreters in every state, with the deepest coverage in major metros like New York, Los Angeles, Chicago, Houston, Miami and Washington DC (full list on our locations page). Lead time is the one thing worth planning around: the qualified ASL pool is a fraction of the spoken-language workforce, and the good ones book out further ahead.
| Setting | Suggested lead time | Worth knowing |
|---|---|---|
| Medical appointment | 3–5 business days | Recurring visits can hold the same interpreter |
| Workplace meeting or training | 1–2 weeks | Half-day sessions may need a team of two |
| School or IEP meeting | 1–2 weeks | Tell us if an EIPA-assessed interpreter is preferred |
| Court hearing or deposition | 2–3 weeks | Legally qualified interpreters book out earliest |
| Conference or public event | 3–4 weeks | Team of two standard beyond about an hour |
| Urgent or same-week | Call us | Often possible in larger metros, not always |
Four steps from request to interpreter on site.
Send the date, start and finish time, full site address, the type of appointment and how the Deaf person prefers to communicate, through the quote form or by phone at +1 (833) 282 8883.
We assign an ASL interpreter whose credentials fit the setting, and flag whether the assignment is long enough to need a team of two.
You receive a written confirmation with the interpreter details and a fixed price. Send agendas, case names or technical terms ahead so the interpreter can prepare.
The interpreter arrives early, agrees on positioning and lighting, and interprets everything said in the room so the meeting runs at its natural pace.
ASL interpreting is billed by the hour, almost always with a two-hour minimum, because the interpreter commits a block of their day and usually travels. As a guide, US market rates commonly run from about $75 to $150 per hour. Legal assignments sit at the top of that range, routine community work nearer the bottom, and rates differ between metros.
What moves the number is length, location, notice and headcount. An assignment beyond roughly an hour of continuous interpreting usually needs two interpreters in rotation, because signing accuracy drops sharply when one person works flat out. Evening and weekend work carries a premium, and short notice costs more than a booking made three weeks ahead. Send the details through the quote form and your written quote confirms the exact price before you commit.
Tell us the date, the setting and where it is. We confirm a qualified interpreter and a clear price, usually the same business day.
Get a Free Quote Call +1 (833) 282 8883