An audiologist diagnoses and manages hearing and balance problems and typically holds a doctor of audiology; a hearing instrument specialist selects and fits hearing aids, administers and interprets hearing tests and takes ear impressions.
The Bureau of Labor Statistics says audiologists' ability to diagnose as well as treat is what separates the two.
This guide compares education, licensing, scope, pay and hiring — and the route from one license to the other.
What is the difference between an audiologist and a hearing instrument specialist?
The Bureau of Labor Statistics defines audiologists as the professionals who diagnose, manage, and treat patients who have hearing, balance, or related problems.
Its typical-duty list for audiologists runs from examining patients with outer, middle or inner ear conditions and diagnosing problems to creating treatment plans, fitting and dispensing hearing aids and other assistive listening devices, and counseling patients and families.
BLS describes the neighboring occupation as hearing aid specialists: the people who select and fit hearing aids for customers, administer and interpret tests of hearing, and take ear impressions.
The International Hearing Society notes the same occupation also goes by hearing instrument practitioner and hearing aid dispenser, and describes these professionals as licensed healthcare professionals who evaluate hearing health.
Our hearing instrument specialist career hub follows that role in depth — this page keeps to the comparison.
The distinction BLS draws is diagnosis: audiologists' ability to diagnose as well as treat patients distinguishes their work from that of hearing aid specialists.
Both are licensed careers.
BLS reports that all states require audiologists to be licensed, and hearing aid dispensing is credentialed by each state under its own rules.
Whether an audiologist needs a second credential to dispense is one of those state-by-state details: in Kansas, an audiologist license alone does not authorize dispensing and fitting hearing aids — licensed audiologists must also hold a license under the state's hearing aid act.
Maryland's statutory definition of the practice of audiology, by contrast, includes dispensing or fitting hearing aids.
Education and licensing compared
The audiologist route runs through graduate school.
Entry to an AuD program requires a bachelor's degree, and the doctor of audiology degree typically takes 4 years.
The license comes after the degree.
BLS reports that all states require audiologists to be licensed, with requirements that vary by state but typically include an AuD from an accredited program.
The specialist route is shorter on paper and governed by the states.
BLS's summary data lists the typical entry education for hearing aid specialists as a high school diploma, with moderate-term on-the-job training.
IHS says most hearing aid specialists enter through on-the-job training or apprenticeship, with academic hearing instrument sciences programs at a few U.S. and Canadian colleges.
State licensing sets the bar that matters.
Each state's licensing agency decides who can sit the written exam, and most states and provinces across the United States and Canada use the International Hearing Society's International Licensing Examination as the written licensing exam for hearing aid specialists.
Because the exam is practice-based and its questions are referenced to IHS's distance-learning course materials, IHS says success on it without clinical experience is unlikely.
National credentials sit alongside the state licenses.
For audiologists, ASHA's CCC-A standards require a doctoral degree in audiology from a CAA-accredited program, a program in CAA candidacy, or the equivalent.
For hearing aid specialists, NBC-HIS offers BC-HIS — Board Certified in Hearing Instrument Sciences — earned by passing its National Competency Exam.
It is a voluntary credential, not a license.
State rules decide the details
Scope: testing, diagnosis, fitting
The audiologist's scope documents describe a wide remit.
ASHA's Scope of Practice in Audiology describes audiologists as providing hearing and balance assessment, nonmedical treatment and rehabilitation — including diagnosis — for people of all ages.
The American Academy of Audiology's 2023 scope adds standing: audiologists are independent practitioners who serve as point-of-entry health-care providers for people with auditory and vestibular disorders, and they determine the appropriateness of both prescriptive and over-the-counter hearing aids.
Balance work sits inside that scope.
BLS notes audiologists also help patients with vertigo or other balance problems — demonstrating head-movement or positioning exercises is its example.
On the specialist side, BLS's duty list covers selecting and fitting hearing aids, administering and interpreting tests of hearing, and taking ear impressions.
That is the practical shape of the BLS diagnosis distinction: the audiologist's duty list reaches the diagnostic and rehabilitative layer, and the specialist's covers testing and fitting.
Payer rules draw the same line from the billing side.
CMS's Benefit Policy Manual says hearing instrument specialists and audiology students may furnish the labor for audiology tests billed by physicians or hospital outpatient departments only under direct physician supervision, depending on Medicare Administrative Contractor (MAC) qualifications.
One caveat travels with every scope claim: scope documents describe professions, while the state license decides what an individual licensee may do in that state.
Confirm the boundary with the board, not with a national document.
Pay and settings compared
Both occupations have exact figures in BLS's May 2025 wage survey, and the gap is clear: the median annual wage was $95,780 for audiologists (SOC 29-1181) and $65,160 for hearing aid specialists (SOC 29-2092) — $46.05 an hour against $31.33.
Both are wage-and-salary medians in the Occupational Employment and Wage Statistics survey, so self-employed practice owners sit outside them.
The spread around the medians is wide on both sides: audiologists ran from $64,610 at the 10th percentile to $133,120 at the 90th, hearing aid specialists from $38,400 to $94,020.
The same survey counted 13,660 employed audiologists and 11,270 employed hearing aid specialists — employee counts, not total populations.
Demand projections point up for both, faster on the specialist side: BLS's 2025–35 projections have audiologist employment growing from about 14,200 to 15,700 (11.0 percent) and hearing aid specialist employment from about 11,200 to 13,400 (19.4 percent).
Those projection counts include the self-employed, which is why the 2025 bases differ from the wage-survey counts above.
A methods note before you quote any of this: BLS's Occupational Outlook Handbook has no detailed profile for hearing aid specialists.
The occupation appears only on its “Data for Occupations Not Covered in Detail” summary page.
The specialist's duty description here comes from that page; the wage and projection figures come from BLS's wage-survey data and Employment Projections tables.
The duty lists hint at the settings: the audiologist's — examining, diagnosing, treatment plans, dispensing, counseling — reads like a clinic's, and the specialist's three duties read like a dispensary's core work.
Where each title actually works, employer by employer, the two career guides go deep: the audiologist career guide and the hearing instrument specialist career hub.
Which should a practice hire?
For an employer, this is a service-line decision before it is a staffing one.
If the practice's revenue runs through diagnostic audiology and Medicare, CMS's rules apply where tests are billed by physicians or hospital outpatient departments: hearing instrument specialists and audiology students may furnish the labor only under direct physician supervision, depending on Medicare Administrative Contractor (MAC) qualifications.
The qualified audiologist bar is strict.
Medicare does not pay for audiological tests performed by aides, assistants or technicians who do not meet the qualified audiologist definition in the manual.
A fourth-year AuD student with a provisional state license is not a qualified audiologist under the same section unless they also hold a master's or doctoral degree in audiology.
A dispensing-led business weights the other way: the specialist covers BLS's specialist duty list — selecting and fitting hearing aids, administering and interpreting tests of hearing, and taking ear impressions.
AAA's 2023 scope also matters for mixed staffing: audiologists may delegate to and supervise non-audiologists such as technicians and clinical assistants, and it is audiologists who determine the appropriateness of both prescriptive and over-the-counter hearing aids.
Whatever the mix, two checks come before any job offer: what the state lets each license do in your location, and what the candidate's license and exam history actually show.
Both answers come from the issuing board, not from the resume.
When the role is defined, the employer-side guides live on the hiring hub — the starting point for practices that need to hire an audiologist, a specialist or clinic support staff.
Confirm scope with the state boards
Going from HIS to audiologist
There is no exchange rate between the two licenses: audiologist licensing runs on its own education path, which typically means an AuD from an accredited program.
An experienced specialist starts at admissions, not at the finish line.
The route, in order: a bachelor's degree, which is the entry requirement for AuD programs; the doctor of audiology program itself, which typically takes 4 years; then the state audiologist license after graduating.
ASHA's CCC-A becomes available at that level too — its 2020 standards require a doctoral degree in audiology from a CAA-accredited program, a program in CAA candidacy, or the equivalent.
Dispensing experience is not wasted on the route.
Fitting hearing aids and counseling patients are duties BLS already lists for audiologists, so a seasoned specialist arrives fluent in the dispensing half of an audiologist's job.
What the degree adds is the diagnostic layer — and the balance and vestibular work that comes with it.
Funding is the part to plan around early.
Under the Education Department's rule that took effect July 1, 2026, new Grad PLUS loans end for periods of instruction beginning on or after that date.
Graduate students are instead limited to $20,500 a year and $100,000 aggregate in Direct Unsubsidized loans — a cap worth modeling against any program's cost before you enroll.
When you are ready to look at programs, the doctor of audiology degree guide explains what the AuD covers, and the CSDCAS application guide walks through the application cycle.
Career information, not licensing, legal, medical, clinical, billing or coding advice — confirm education and licensing requirements with the state boards named, and Medicare billing rules with CMS.