Whether you're running a university speech and audiology clinic that has never billed insurance before or you've enrolled in one government program but not the other, the Medicare vs. Medicaid question comes up constantly. And honestly, it makes sense that it's confusing: both are government health programs, both cover speech-language pathology and audiology services, and both involve clinical documentation, claims submission, and compliance obligations.
But they operate completely differently at the clinic level. The enrollment requirements are different. The supervision rules are different. The populations they cover are different. And the billing mechanics are different in ways that directly affect your scheduling, your staffing, and your revenue.
This post breaks down what you actually need to know as a clinic director or clinical supervisor, so you can figure out which programs apply to your caseload and what it takes to enroll and bill correctly.1
How Medicare and Medicaid Actually Work
The single most important thing to understand is this: Medicare is a federal program, and Medicaid is a state-administered program.
Medicare is run entirely by the federal government through the Centers for Medicare and Medicaid Services (CMS). The rules are the same everywhere. The enrollment process is the same in Iowa as it is in Florida. The fee schedule is nationally standardized (with some geographic adjustments). When you enroll in Medicare, you're working within a single federal framework.
Medicaid works differently. The federal government requires every state to have a Medicaid program and sets certain minimum standards, but each state designs and administers its own program. That means covered services, payment rates, prior authorization requirements, and provider enrollment processes all vary by state. What Iowa Medicaid covers may not be exactly what California Medicaid covers. The enrollment process in one state looks nothing like the process in another.
This distinction shapes everything that follows. Medicare research is relatively straightforward: ASHA and CMS publish detailed national guidance you can follow. Medicaid enrollment requires state-specific research, and you'll need to look into what your state's program actually covers for speech-language pathology and audiology, what the enrollment application looks like, and whether your state uses Managed Care Organizations (MCOs) that layer their own requirements on top of the state program.
Who Each Program Covers
This is where the rubber meets the road for university clinic directors, because your patient population determines which programs are worth pursuing.
Medicare primarily covers adults 65 and older. It also covers certain individuals under 65 who qualify based on a disability determination or specific diagnoses like end-stage renal disease or ALS. If your clinic serves adult patients with stroke, aphasia, dysphagia, hearing loss, or neurological conditions, there's a good chance some of them are Medicare beneficiaries.
Medicaid covers low-income individuals and families. But the part that matters most for university clinics is EPSDT: Early and Periodic Screening, Diagnosis, and Treatment. Federal law requires Medicaid to cover all medically necessary services for children under 21, including speech-language pathology and audiology, under EPSDT.5 This is codified at 42 CFR §440.110, which establishes federal coverage of speech, hearing, and language disorder services.4 Even if a state's general Medicaid plan doesn't explicitly list your services, EPSDT can require coverage for children under 21 if those services are medically necessary.
For university clinics with significant pediatric caseloads (language delays, articulation disorders, fluency, early intervention cases), Medicaid (and EPSDT specifically) represents a major untapped revenue opportunity.6
Most university clinics serve a mixed-age caseload. Adult aphasia patients alongside pediatric language cases. Geriatric swallowing patients alongside children with autism. That mix means both programs are relevant, and understanding which applies to which patient is a foundational skill for anyone managing billing at a university clinic.
Medicare Enrollment Is Not Optional
This is the point that surprises a lot of clinic directors: if you're treating Medicare beneficiaries, federal law requires you to enroll in Medicare and submit claims for covered services. Full stop.2
Unlike physicians, who have a formal "opt-out" mechanism that allows them to charge patients directly outside the Medicare system, SLPs and audiologists do not have that option. You can't decide you'd rather not deal with Medicare paperwork and collect cash from Medicare patients instead. If your patient is a Medicare beneficiary and you're providing a covered service, you must bill Medicare.
The enrollment process involves a few moving parts. Each individual clinician needs a National Provider Identifier (NPI). The clinic itself also needs its own NPI as a group or organization. Then the clinic completes the CMS-855B enrollment application to become a Medicare supplier. ASHA's mandatory enrollment guidance walks through this process in detail.2
One scenario that comes up in university settings: a new clinic director takes over a program that has been serving older adult patients without anyone having enrolled in Medicare. Those patients may have been billed self-pay or sliding scale rates. That's a compliance problem, not just a revenue miss, and it's worth auditing if you're walking into that situation.
The good news is that once you're enrolled, Medicare billing is relatively standardized. You know the rules. You know the fee schedule. And the claim submission process, while it requires EDI (electronic) claims through a clearinghouse, is consistent.
Supervision Rules: Where the Two Programs Diverge the Most
If you've been treating Medicare patients in a university clinic without thinking carefully about supervision, this section deserves your full attention.
Under Medicare Part B, the supervision standard for student clinicians is strict: the qualified SLP or audiologist must be physically present in the treatment room, actively directing the service, for the entire time a student is working with a Medicare patient.3 They cannot step out. They cannot simultaneously treat another patient. They cannot supervise two students in adjacent rooms.
This isn't a technicality. ASHA's guidance on student supervision under Medicare makes this explicit: "The qualified practitioner must be in the room, guiding the student in service delivery... and the practitioner is not engaged in treating another patient or doing other tasks at the same time."3 If you have not been meeting this standard for Medicare patients, you're not in compliance with federal requirements.
Medicaid supervision rules are different, and generally more flexible. Because Medicaid is state-administered, each state sets its own supervision standards. Many states allow supervisors to provide general supervision, which means they don't need to be physically present in the room for every minute of every session. They may need to be immediately available or review documentation, but the specific requirements vary. You'll need to look up your state's Medicaid supervision rules specifically.
What this means practically for scheduling: Medicare patients require dedicated, one-on-one supervisor time. You can't stack Medicare cases into a session where one supervisor is overseeing multiple students. This affects how many Medicare patients your clinic can realistically see and needs to factor into your staffing decisions when you're thinking about enrollment.
Documentation matters here too. The supervision level you provided needs to be reflected in the clinical notes, and the billing claim must accurately represent who provided the service and under what supervision arrangement.
Billing Mechanics: MPFS vs. State Fee Schedules
Once you're enrolled, the billing mechanics of the two programs work quite differently.
Medicare uses the Medicare Physician Fee Schedule (MPFS): a nationally standardized set of payment rates for CPT codes, adjusted for geographic location using a locality multiplier.7 CMS updates the fee schedule annually, effective January 1. The rates are publicly available, ASHA publishes an annual analysis of the fee schedule for SLPs and audiologists, and you can look up what Medicare will pay for a specific CPT code in your region before you see your first Medicare patient.
Medicare claims must be submitted electronically through an EDI clearinghouse. There's no paper claim option for outpatient Medicare services. The clearinghouse routes your claims to the Medicare Administrative Contractor (MAC) for your region, and you receive remittance electronically.
Medicaid billing operates differently in every state. Each state has its own fee schedule with its own covered CPT codes and payment rates, and those rates can vary significantly. Some state Medicaid programs pay very close to Medicare rates for SLP services; others pay substantially less; some pay more. You won't know until you look up your state's specific schedule.
Administrative requirements vary too. Some states have their own web-based claim submission portals. Some states route Medicaid managed care through MCOs that each have their own submission portals, prior authorization processes, and timelines. If your state uses MCOs, you may need to contract separately with each MCO that covers your patient population, on top of enrolling with the state Medicaid program itself.
The bottom line: Medicare is more predictable once you're in; Medicaid requires more upfront state-specific research but can be very valuable, especially for clinics with large pediatric caseloads. Good slp billing software should handle both programs from a single platform, not require you to juggle two systems.
Private Insurance: The Third Option
Medicare and Medicaid get most of the attention in university clinic billing conversations, but commercial (private) insurance is worth a mention because some clinics are successfully contracting with commercial payers alongside their government program enrollment.
Illinois State University's Eckelmann-Taylor Speech and Hearing Clinic, for example, participates as a provider with Blue Cross Blue Shield of Illinois, in addition to accepting Medicaid.8 That's not unusual for clinics that have built out their billing infrastructure and want to capture revenue from patients whose primary coverage is through an employer plan.
Contracting with commercial insurers adds complexity. Each insurer has its own credentialing process, fee schedule, claim submission requirements, and prior authorization rules. It's typically not where a clinic new to billing should start. But once you've got Medicare and Medicaid enrollment in place and your billing workflows running smoothly, commercial contracting can be a logical next step.
Some clinics use a courtesy billing approach with commercial insurers, submitting claims on the patient's behalf without being formally in-network. The reimbursement rate and outcome vary by payer, but it can be a way to reduce the out-of-pocket burden for patients while you evaluate whether full contracting makes sense.
Getting Your Priorities Straight
At the end of the day, the Medicare vs. Medicaid question for university SLP and audiology clinics comes down to your patient population and your compliance obligations.
If you're treating patients who are Medicare beneficiaries, enrollment isn't a choice. It's a federal requirement. And your supervision workflow needs to meet Medicare's strict in-room standard for every session involving a Medicare patient and a student clinician.
If your caseload includes children under 21 from low-income families, Medicaid enrollment (and understanding EPSDT coverage) is probably your biggest untapped billing opportunity. The enrollment process requires state-specific research, but the revenue potential, especially for pediatric-heavy programs, is real.
Both programs can run through the same EMR platform. You don't need to manage separate billing systems or documentation workflows for each payer. Managing multi-payer billing in one place is one of the things ClinicNote was built for, with supervisor-linked documentation workflows that meet Medicare's supervision documentation requirements and the ability to manage Medicare, Medicaid, commercial, and self-pay billing all in one place. If you're ready to get your billing infrastructure sorted out, schedule a demo and see how it works for university clinics like yours.
Sources
- https://www.asha.org/practice/reimbursement/medicare-vs-medicaid/
- https://www.asha.org/practice/reimbursement/medicare/medicare-mandatory-enrollment-and-claim-submission-requirements/
- https://www.asha.org/practice/reimbursement/medicare/studentparticipationslp/
- https://www.ecfr.gov/current/title-42/chapter-IV/subchapter-C/part-440/subpart-A/section-440.110
- https://www.asha.org/practice/reimbursement/medicaid/medicaid-toolkit-epsdt/
- https://www.asha.org/practice/reimbursement/medicaid/mcaidcoverageslp/
- https://www.asha.org/practice/reimbursement/medicare/overview-of-the-medicare-physician-fee-schedule/
- https://speechandhearing.illinoisstate.edu/billing-insurance/