Speech Therapy Billing Services

Speech-language pathology billing splits into groups that share almost no payer rules.

Pediatric speech clinics run on commercial plans and Medicaid, where visit limits, authorization windows and developmental-delay diagnosis requirements drive most denials. Evaluation and treatment on the same date is a routine bundling fight.

Adult outpatient and post-acute SLP practices bill Medicare Part B, where the GN modifier, the KX threshold, plan of care certification and the multiple procedure payment reduction all apply. Dysphagia work adds swallowing studies and a separate set of covered diagnosis rules.

Teletherapy groups carry place of service and modifier exposure on every claim, and a hard Medicare deadline of December 31, 2027 on current distant-site authority.

School-contracted and early intervention providers bill state Medicaid school programs with their own enrollment, documentation and cost-settlement rules that look nothing like commercial billing.

Most practices bill across two or three of these at once, alongside occupational and physical therapy, audiology, swallow studies and caregiver training. Our full-service medical billing team runs all of them in one work queue rather than one queue per payer type.

Dollar figures below are CY2026 Medicare Physician Fee Schedule national non-facility amounts, calculated at the $33.4009 conversion factor. Commercial rates vary, but the failure patterns do not.

Payment amounts below are CY2026 Medicare Physician Fee Schedule national non-facility figures, before geographic adjustment. They are the floor most commercial contracts are written against.

SLP CPT Codes for Evaluation and Treatment

Why 92523 is the code most often under-selected

92523 pays roughly twice what 92522 pays because it covers both speech sound production and language comprehension and expression. Practices that evaluate both and bill 92522 out of habit give up $114.57 per evaluation. The fix is a documentation template that makes the language component explicit. Our certified medical coding team checks the note against the code billed before the claim leaves.

Caregiver training codes added in 2024 and 2025

CPT 97550, 97551 and 97552 took effect January 1, 2024 and cover training a caregiver in strategies to support the patient functional performance at home or in the community. HCPCS G0541, G0542 and G0543 took effect January 1, 2025 and cover direct care strategies that reduce complications. The two sets are not interchangeable and payer acceptance differs. Both are furnished without the patient present and, from an SLP, both carry GN. Most speech practices deliver this work weekly and bill none of it.

This is the mechanic that separates speech therapy billing from physical and occupational therapy billing, and the one most guides get backwards.

Most SLP codes are untimed session codes

92507, 92508, 92521, 92522, 92523, 92524, 92526 and 92610 carry no time increment in the CPT descriptor. They are session codes. CMS instructs providers to enter 1 in the units field for any HCPCS code not defined by a specific timeframe. A 60-minute 92507 session and a 30-minute 92507 session are both one unit and both pay $76.15. Billing two units because the session ran long produces a payment that is later recouped, and a recoupment reopens the whole date of service.

The 8-minute rule applies only to the timed codes an SLP may bill

The 15-minute timed codes that appear on speech claims are 97129 and 97130 for cognitive intervention. For those, CMS counts total treatment minutes into units:

What happens when the two are mixed on one claim

A therapist who treats language and cognition in one visit cannot add 97129 minutes to a 92507 session without checking the edits. The National Correct Coding Initiative policy manual states that speech language pathologists shall not report 97110, 97112, 97150 or 97530 as unbundled services included in 92507, 92508 or 92526, and separately addresses 97129 and 97130 billed by one practitioner on the same date as the session codes. Pairs submitted without a supportable modifier deny, and the appeal is usually lost because the note documents one continuous session. We run this edit check before submission rather than after the denial, inside our denials and AR recovery queue.

GN is the only therapy discipline modifier an SLP uses

CMS defines GN as services delivered under an outpatient speech-language pathology plan of care. GO is occupational therapy and GP is physical therapy. Every outpatient therapy claim carries one of the three, and for speech it is always GN. Practices sharing a billing setup with a PT or OT line get this wrong most often, because the default modifier on the charge template was never changed. The GN modifier was missing or incorrect on 9% of Medicare speech therapy claims we audited.

The 2026 KX modifier threshold

For CY2026 the KX modifier threshold is $2,480 for physical therapy and speech-language pathology services combined, and $2,480 for occupational therapy, up from $2,410 in CY2025. Two points get missed. PT and SLP share one threshold, so a patient in physical therapy consumes the speech allowance. And the threshold is not a cap: the outpatient therapy caps were permanently repealed effective January 1, 2018 under the Bipartisan Budget Act of 2018, so past $2,480 medically necessary care is still payable with KX appended. The targeted medical review threshold is a separate $3,000 and stays there until CY2028.

MPPR on same-day therapy services

Medicare applies a multiple procedure payment reduction to the practice expense portion of always-therapy services. Since April 1, 2013 the reduction is 50%, and it applies across disciplines, so a patient seen by an SLP and a PT on the same day triggers it. Modeling revenue off the full fee schedule amount for every code overstates what a multi-service day collects.

Plan of care certification and recertification

The physician or non-physician practitioner certifies the initial plan of care within 30 calendar days of the first treatment day, and recertifies at least every 90 calendar days after treatment starts or whenever the plan materially changes. Nothing furnished after a lapsed certification is payable. Recertification lapsed past 90 days on 12% of Medicare speech therapy episodes in our audit, a calendar problem rather than a clinical one. We track certification dates beside authorizations in the same queue as eligibility and prior authorization.

Speech claims can go out with GP or GO when the practice also bills therapy

CMS Publication 100-04, Chapter 5 defines GN as services delivered under an outpatient speech-language pathology plan of care, GO as occupational therapy and GP as physical therapy. A speech service carrying GP is denied, or paid and later recouped. See the Medicare Claims Processing Manual, Chapter 5. At $76.15 per 92507 session, one mis-set charge template costs a four-therapist practice thousands a month.

The 8-minute rule sets units for every speech therapy code

It does not. CMS instructs providers to enter 1 unit for HCPCS codes not defined by a specific timeframe, which covers 92507, 92508, 92521 through 92526 and 92610. The 8-minute table applies to 15-minute timed codes such as 97129 and 97130. See the Claims Processing Manual, Chapter 5, section 20.2. Overbilled units are recouped and open the date of service to review.

An SLPA can treat and the supervising SLP can bill the session

Services of speech-language pathology assistants are not recognized for Medicare coverage, and student time is not billable. There is no SLP equivalent of the CQ and CO assistant modifiers PTAs and OTAs use. See CMS article A53339 on therapy students and aides. A schedule built on assistant-delivered Medicare visits cannot be billed, and the exposure is retroactive.

Extra therapy time can be captured by adding 97110 or 97530 to the session

The National Correct Coding Initiative policy manual states that speech language pathologists shall not report 97110, 97112, 97150 or 97530 as unbundled services included in 92507, 92508 or 92526. See the NCCI Policy Manual, Chapter 11. These pairs deny on the edit and appeals fail, because the note documents one session. Coding and modifier errors caused 21% of denials across our claim audit.

Speech practices run on a narrow set of systems, and we work inside whichever one you already use. No migration, no parallel system, no data export.

We bill daily in rehab-therapy platforms including Raintree, Fusion Web Clinic, TheraNest, Prompt EMR, Net Health and TheraOffice, in general practice and behavioral platforms including SimplePractice, TherapyNotes, Tebra, athenahealth, eClinicalWorks and NextGen, and in school and early intervention documentation systems such as Frontline, eSped and state Medicaid school portals. For clearinghouse and eligibility work we use Availity, Office Ally, Waystar and Change Healthcare.

If therapists document in one system and the school contract runs in another, we reconcile both rather than asking you to consolidate.

Figures below come from the Luxen claim audit of 61,400 claims reviewed between January 2025 and June 2026, the Luxen billing reviews dataset of 410 practice billing reviews over the same period, and Luxen client data covering 38 client practices from January 2024 to June 2026.

• The GN modifier was missing or incorrect on 9% of Medicare speech therapy claims, across 3,600 SLP claims audited January 2025 to June 2026 (Luxen claim audit).
• Untimed session codes were billed with more than one unit on 6% of speech therapy claims in that same 3,600-claim sample (Luxen claim audit).
• Recertification lapsed past 90 days on 12% of Medicare speech therapy episodes reviewed (Luxen claim audit).
• Same-date evaluation and treatment were denied for bundling on 11% of speech therapy claims audited (Luxen claim audit).
• Speech therapy practices carried a median 39 days in AR at intake, across 410 practice billing reviews, January 2025 to June 2026 (Luxen billing reviews).
• Across 38 client practices, median days in AR dropped from 54 to 33 within 120 days, and appeals filed by Luxen were overturned 68% of the time (Luxen client data, January 2024 to June 2026).

Luxen charges 3% to 6% of collections, no setup fee, no exit fee, month to month with 30 days notice. Speech practices usually land in the lower half of that range.

Worked example. A four-therapist pediatric speech practice collects $780,000 a year across commercial plans, Medicaid and a school contract. At 5%, Luxen costs $39,000 a year, or $3,250 a month.

Fully loaded in-house billing cost 7.9% of collections for practices under $2M, across 96 practices that shared payroll data with us. At $780,000 that is $61,620, the in-house column above.

The cost difference is the smaller half of the argument. Moving net collection rate from 91.4% to 97.8%, which is what our client practices averaged over the first six months, is worth roughly $50,000 a year on $780,000 of collections. Cash timing matters too. Every 10 days removed from AR released a median $41,000 for practices collecting $1.5M to $3M a year. Neither number appears on an invoice. Patient balances are the other half, and we run statements and payment plans through patient billing so the front desk is not chasing them between sessions.

Price and references do not separate a company that knows SLP rules from one that does not. These questions do.

• Which of our codes are untimed, and how do you stop a second unit going out on 92507?
• Who tracks the 30-day certification and 90-day recertification dates, and where do we see that list?
• How do you track the combined PT and SLP KX threshold for a patient who is also in physical therapy?
• If we hold a school contract, do you handle state Medicaid school enrollment and cost reporting?
• Who owns denial follow-up on our account by name? 42% of practice managers said nobody owns denial follow-up full time inside their own practice.
• What is the fee basis in writing, and what happens to claims already in process if we leave? 44% of practice managers could not name the fee basis in their current billing contract.

You can compare medical billing companies by state and by what each type actually owns. 52% of practices that switched billing vendors cited missing denial reporting as the main reason, so ask to see the denial report before you sign.

• CMS, Therapy Services, CY2026 KX modifier threshold, targeted medical review threshold and MPPR
• Medicare Claims Processing Manual, Publication 100-04, Chapter 5, therapy modifiers and timed code units
• CMS MLN 905365, Complying with Outpatient Rehabilitation Therapy Documentation Requirements
• CMS Article A53339, Billing and Coding: Therapy Students and Aides
• Medicare NCCI Policy Manual, Chapter 11, speech-language pathology edits
• CMS CY2026 Physician Fee Schedule Relative Value File RVU26A
• Federal Register, CY2026 Physician Fee Schedule final rule, CMS-1832-F
• CMS Transmittals R12232CP and R12980CP, caregiver training codes 97550 to 97552 and G0541 to G0543
• Bipartisan Budget Act of 2018, Public Law 115-123, section 50202
• CMS State Medicaid Director Letter SMD #14-006, free care policy
• CMS, Delivering Service in School-Based Settings, 2023
• Texas HHSC, School Health and Related Services
• California DHCS, Local Educational Agency Medi-Cal Billing Option Program Provider Manual
• Luxen client data, 38 client practices, January 2024 to June 2026. Luxen billing reviews, 410 practice billing reviews, January 2025 to June 2026. Luxen claim audit, 61,400 claims audited, January 2025 to June 2026. Luxen Practice Manager Survey 2026, 286 practice managers, March 2026.