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Denial of speech therapy claims is always avoidable. This is because a step in the process was missed during submission rather than anything wrong done by the payer.
Outcomes from our service arise due to conducting the same checks on each claim. We verify GN modifiers on all Medicare Part B claims before their submission. We do evaluation codes’ review against the bundling rule so that the correct code applies to the session.
Total cumulative physical therapy and speech language pathology costs are monitored against the KX threshold, which means that no claim will be missed when it exceeds this limit. Services related to swallowing and augmentative communication are billed separately as their own line of service. Denials are handled at the source, and therefore, the same mistake will not occur in the next billing period.This process is easy to implement, but is often bypassed when claims for speech language pathology are processed by a biller using a general CPT code set training. Such knowledge becomes increasingly valuable when a case gets complicated, which is why our clients are not necessarily large facilities.
There are several reasons why speech therapy claims are rejected repeatedly: missing GN modifier, evaluation code that is subject to its own bundling policy, a breached threshold without KX, and unbilled services that were rendered.
Evaluation codes. There is a preference in the coding of one single evaluation code due to the practice routine instead of choosing between 92521, 92522, 92523 and 92524, depending on the session documentation. As such, CPT 92523 already includes 92522, and billing both on the same date results in bundling rejection.
Our coders use the bundling rules as per the documentations prior to submission and audit the claim in relation to the current NCCI edits, including the restriction for 92507 when it comes with an evaluation code.
No GN modifier or incorrect one. Each claim for Medicare Part B Speech Language Pathology requires GN. A claim without GN will be automatically denied upon receipt and will not go into adjudication. GN modifier is used by us on each Medicare claim as a fixed step, not as an audit.
Dysphagia and AAC underbilling. Evaluations for swallowing disorders and services provided using Speech Generating Device are always combined into the General Services code and therefore not coded as a separate line. We code 92610-92612 and 92607-92609 as separate service lines.
SLPA services. Medicare has no modifier for assistants in Speech Language Pathology area, hence the attribution has to be built based on the supervisor’s name as rendering provider. We take care of building appropriate documentation and NPI attribution for that.Thresholds and State Rule enforcement. Physical Therapy and Speech Language Pathology spending are tracked according to KX thresholds and Medicaid rules regarding unbundling are built into the workflow on state level.
A private practice, an outpatient clinic and a hospital/SNF department are billed using different rules. We bill all these different settings, including multidisciplinary rehabilitation programs providing speech language pathology together with physical and occupational therapy services. Each setting requires its own rules and therefore, a biller that knows them.
The billing is performed using Medicare Part B professional claims. All these claims include GN modifier, which indicates the plan of care of speech language pathology services.
Evaluation code choice controls everything else. CPT 92523 already contains 92522, so billing both codes on the same date will result in a bundled denial. After the patient reaches the KX threshold for their combined physical therapy and speech language pathology treatment, every claim thereafter must have the KX modifier and supporting documentation.
Children’s caseloads are covered by commercial and Medicaid policies, rather than Medicare. The prior authorization guidelines vary from policy to policy, but Medicaid guidelines vary not only between payers, but also by state, such as what codes may be separately billable and documentation of school based services. Caregiver training and AAC services are often provided to children, and these are the two most commonly unbilled services.
Billing of physical therapy, occupational therapy, and speech simultaneously presents two issues. One is the modifier issue and the second is threshold issue. Each of these disciplines have their respective plan of care modifiers; for the case of speech therapy, the relevant modifier is GN. The KX threshold involves physical therapy and speech language pathology, whereas occupational therapy is separate. Multiple Procedure Payment Reduction kicks in when services of two disciplines are billed for the same patient on the same day.
These speech clinics provide services through institutional claims, rather than professional claims. While the patient is in an inpatient stay under Part A, speech therapy is considered consolidated billing and cannot be billed as a separate bill to Part B. Submitting the bill to Part B while the patient is in the inpatient stay results in a denial.
The problem of turnover is addressed via outsourcing, but the problem of knowledge becomes moot because the generalist biller never had it to begin with. When we consider the billing of speech language pathology cases, the code list remains flat and unbundled, while the modifier for the plan of care is applied occasionally or not applied at all. Among the four billing companies audited by us specializing in billing for speech therapy, three do not have modifier GN listed on their webpage.
Any speech therapy claim entails transferring PHI from the clinic to the clearinghouse to the payer, and many patient records pertain to minors, increasing what a breach will cost and decreasing who has access rights.
When it comes to the billing of pediatric and school based speech language pathology services, there are patient records who cannot give consent, plus records of their guardians, school districts, and Medicaid. This information set is regulated by HIPAA and HITECH Act and receives much attention compared to usual adult claims.
RCM Xpert is responsible for speech therapy billing according to business associate agreements and PHI encryption in transmission and storage. Access control based on role means that each employee will have access to the documents that are necessary because of his/her specific role only. It will also be logged and monitored, access will be restricted if the role changes, and HIPAA compliance training will be given.
RCM Xpert manages the entire revenue cycle for speech language pathology, from verifying coverage prior to the first appointment through aging accounts receivable recovery, not taking over claims filing after the provider has coded them.
Eligibility and benefit coverage, including limits on visits and patient co insurance/deductible responsibilities, are verified prior to the evaluation, including if the insurance covers dysphagia and/or AAC service codes.
Prior authorization is requested and tracked against its expiration date, and that is important for pediatrics commercial and AAC evaluations.
Services such as evaluation, treatment, dysphagia services, and AAC are coded by certified coders, and GN modifier is attached to Medicare Part B claims. Bundling rules are reviewed prior to submission.
Claims go through validation and NCCI edits and are submitted electronically with ERA and 835 remittance comparison.
Denials are investigated for the underlying reason and appealed using documentation required by the payer, and our denial management services webpage describes this in more detail
Payments are posted based on contract rates, so under payments become discrepancies for appeal and not "payment received" closeout.
Payments are posted based on contract rates, so under payments become discrepancies for appeal and not "payment received" closeout.
Aging accounts receivable are chased by payer and by aging buckets, not just submission order.
Payer registration and revalidation are completed using our speech language pathology provider credentialing solution.
Reporting and claim processing take place within your EHR under business associate agreements.
Speech language pathology codes are from the 92000 range, and most codes from this range are unvalued: one unit no matter how long the visit was. This distinguishes speech language therapy from physical and occupational therapy, as the latter have mostly timed codes according to the 8 minutes rule.
Evaluation codes. CPT 92523 includes CPT 92522, so you should not bill these codes on the same day of service – it will be automatically denied. Fluency evaluation, CPT 92521 and voice/resonance analysis, CPT 92524 can be separately billed together with CPT 92523 as separate evaluations.There is no re-evaluation code for speech language pathology. According to CMS, providers should use the original evaluation code with the same documentation as the first one. Physical and occupational therapy use 97164 and 97168 respectively, but there is no re-evaluation code in speech language pathology.
CPT 92507 includes individual treatment of speech, language, voice, communication and auditory processing disorders, and is the most billed code in the field. CPT 92508 includes group treatment of two or more individuals.
CPT 92607 includes assessment for prescription of a speech generating device, while 92608 includes additional time in 30 minute units. CPT 92609 includes therapeutic interventions for device training and adaptation.
CPT 92526 covers treatment of dysphagia/feeding/oral function, billable twice daily based upon a documented “BID” treatment order. Separate billing applies for swallow evaluations using CPT 92610 for the clinical swallow evaluation, 92611 for the modified barium swallow study, 92612 for the flexible endoscopic evaluation of swallowing.
The following five codes are assigned by CMS to Physical/Occupational Therapy. Use on an SLP claim results in denial, and sometimes a compliance determination from State Medicaid Programs.
The GN modifier indicates that a service was rendered through an outpatient speech language pathology plan of care, and it is required by Medicare Part B for nearly all speech therapy claims. Claims without GN are not even adjudicated but automatically denied upon receipt.
The GN modifier is specific to speech language pathology. There are other modifiers used for physical therapy and occupational therapy, and using one of those on a speech therapy claim results in the same denial as leaving no modifier. This is the most important thing about speech therapy billing, and this is the most commonly missed detail as well: among the four companies we audited that have a separate speech therapy billing page, only one ever mentioned GN.
Speech language pathology has no Medicare recognized billable assistant modifier; it is fundamentally different from physical and occupational therapy in this regard. The CQ modifier denotes services provided either wholly or partly by a physical therapist assistant, while CO signifies occupational therapy assistant for OT. SLA does not have any modifier, and that is by design and not by chance in the code set.The SLPA and the students in speech language pathology are considered non-licensed providers under Medicare Part B.
Their services cannot be billed on their own; and there is no mechanism in place for billing such services at a lower rate, like the assistant modifiers for the other two. In SLA, the supervising SLP will be considered the rendering physician and the NPI number will be submitted accordingly.An SLPA practice will need documentation but not code in this case. Supervision records will document the fact that the supervising clinician rendered the service as well.
From the outset, we document NPI attribution and supervision based on the correct rendering provider rule, and it is a compliance issue prior to being a revenue issue.
Multiple Procedure Payment Reduction reduces the payment if the patient receives services from two therapy disciplines on the same day. It is still active for CY2026 and applies to physical therapy, occupational therapy, and speech language pathology, making it a consistent issue that impacts multidisciplinary rehabilitation practices that bill multiple disciplines in one day for one patient.
CMS has proposed to delete CPT 92507, which is the highest billed speech-language pathology treatment code, and replace it with ten separate diagnosis-specific treatment codes beginning in the calendar year 2027.
This is because CMS and the AMA noted that CPT 92507 had been flagged for valuation review since there had been over 100 percent increase in Medicare utilization from 2017 until 2022. There was a Code Change Application submitted during the April 30th to May 2nd, 2026 CPT Editorial Panel meeting.
This is a proposal to track rather than a change to react to yet, and the distinction matters because reacting early to a proposed code change creates the same revenue problem as ignoring a finalized one.Practices that will feel the change most are the ones running high individual treatment volume, since a single catch all treatment code becoming ten diagnosis specific codes shifts the coding decision from routine to clinical. Documentation that supports a diagnosis specific selection is worth building into the workflow before the change is finalized rather than after.We track this proposal directly and will update billing workflows for our speech therapy clients as its status changes.
Voice and fluency billing. Bills for voice and resonance evaluation using 92524 codes and fluency evaluation using 92521 code, both separately billable from 92523 if there is evidence of separate evaluations.Our multi disciplinary practice can offer this service along with our billing services for physical therapy and occupational therapy.
Swallowing, AAC, and caregiver training are the service lines that most frequently get bundled into a general treatment code without separate billing, resulting in no denial and no indication that there was any revenue loss. However, RCM Xpert differentiates them as separate lines.
Dysphagia billing. The swallowing evaluation gets billed separately from dysphagia therapy: 92610 for the clinical assessment, 92611 for the modified barium swallow study, 92612 for the flexible endoscopic evaluation. CPT 92526 includes dysphagia therapy and feeding issues related to oral motor skills and can be billed twice per a documented BID treatment order per day.
AAC billing. Work on speech generating devices is covered under 92607 as an evaluation code, 92608 as a code for each additional 30 minute period, and 92609 for therapeutic intervention that includes programming and modification of the device. Coverage and prior authorizations differ, but generally the latter are required, so we bill accordingly after authorizations.
The in-house speech language pathology billing process seems easier to handle compared to physical or occupational therapy due to most codes being untimed; however, there is actual danger in the bundling policy for evaluation codes as well as the lack of an assistant billing route.
A super low volume speech language pathology practice where the sole practitioner employs a dedicated and highly trained biller familiar with the GN modifier and evaluation code bundling criteria may well do fine keeping its billing in-house. Dysphagia and AAC billing will change the calculation; so will the addition of SLPAs; and even if the biller is known to apply the appropriate thresholds, any inability to confirm that fact alone will cause the cost of outsourcing to drop below the revenue lost through undercoding.It is not an absolute conclusion, of course, but a relative one, based on the volume and complexity of the cases seen and how certain the practice feels about its biller knowing what it needs to.
RCM Xpert handles speech therapy billing for practices across the United States in all 50 states. Since Medicaid coverage and billing policies for speech language pathology services differ from state to state, depending upon which codes can be billed independently and documentation required for school based therapy, nationwide billing services must take this into account.
The state specific laws also affect what becomes billable and not only the process of billing itself. The Medicaid school based billing policy for New York specifies that the services must be performed either by a licensed SLP of the state or a teacher under supervision of a licensed SLP. In its speech therapy service manual for Medicaid, the state of Colorado forbids reporting 97110, 97112, 97150, 97530, 97127, or G0515 as services provided separately from 92507, 92508, or 92526 if performed by an SLP.
Speech therapy claims go through six steps at RCM Xpert starting from coverage verification before the evaluation and up to compliance review after posting payment.
Scrubbing, NCCI edit verification and electronic submission of claims through EDI.
Denials are taken to the source and appealed using the documentation that the payer asked for, and denial patterns are fixed upstream at the time of coding.
All of these phases are handed over to the next phase within the same system so nothing gets left between two people to be noticed by either of them.
Codes assigned at RCM Xpert in the context of speech therapy are performed by certified coders with credentials of AAPC and AHIMA with specialty training for 92000 series codes and not simply assigned from a general medical coding pool.
Certification provides the coding base. Specialized training makes it work in this particular case. What a coder working with speech language pathology claims should be aware of is that 92523 has 92522, that GN must be put on Part B Medicare claims in any case and that swallowing evaluation is a separately payable procedure, not an add on to a treatment session. It is not a part of a general CPC certification and it makes a difference between a clean claim and avoidable denial.
Quality assurance is done pre submission, not post submission. Each claim is reviewed based on NCCI edits, bundling and modifier rules in compliance with all the existing standards prior to being sent to payers. Each denial is analyzed for its root cause and corrected upstream, so the same coding error appears once and not in every claim within the month.
RCM Xpert is an RCM firm that operates out of New York, and specializes in speech language pathology services through in-house certified coders and only one accountable partner who manages the entire revenue cycle and not handing off from one vendor to another.
A competing firm uses actual CPT and ICD-10 codes, which is the best code detail shown in the lot, but it does not use the GN modifier code on any of the pages at all. The same page also mentions occupational therapy codes under speech therapy codes. Another mentions platforms for coding and denial reduction but does not mention a single speech language pathology code.
Speech therapy billing utilizes 92521 to 92524 for evaluation services, 92507 and 92508 for individual/group therapy services, 92526 and 92610 to 92612 for dysphagia services, and 92607 to 92609 for AAC and speech generating device services. Most codes are untimed and billed in one unit per encounter.
Yes. Speech Language Pathology falls under the outpatient physical and occupational therapy covered by Medicare Part B.
GN is the Modifier used to denote that the service was performed in an outpatient speech language pathology plan of care. Medicare Part B requires this modifier on almost all speech therapy claims. A claim not having the GN modifier will be automatically denied during intake rather than being processed further.
CPT 92522 is billed solely for the evaluation of speech sound production, while 92523 is billed for the evaluation of speech sound production along with comprehension and expression, which includes CPT 92522. Both CPT codes cannot be billed on the same date of service; however, billing both CPTs results in a bundling denial.
CMS has proposed to replace CPT 92507 with ten diagnosis specific codes starting in CY2027. Comments can be submitted until September 14, 2026. Currently, CPT 92507 remains completely valid and billable under the rules of CY2026.
Unlike physical therapy modifier CQ or occupational therapy modifier CO, Medicare classifies SLPAs and student clinicians as unlicensed providers. The supervising speech language pathologist is considered the rendering provider of record and NPI of that clinician is used in the claims submission.
Therapy of dysphagia gets billed using CPT 92526. However, evaluations require separate billing of 92610 (clinical evaluation), 92611 (modified barium swallow study), and 92612 (flexible endoscopic evaluation). All three CPTs are billable services rather than components of a therapy visit.
The answer depends on your insurer. For example, 92607 and 92608 are codes that should be used for the device evaluation, while 92609 covers therapeutic applications and programming. Prior authorization is necessary from most insurers, but the requirements may vary.
The small size practice of one provider that has the biller with the training and understanding of the GN modifier and bundling requirements may manage billing in-house. Dysphagia and AAC billing, SLPA staffing, and threshold issues are among the top reasons to outsource.
Yes. RCM Xpert manages billing for speech language pathology practices in all fifty states, implementing the state specific Medicaid and payer policies into the claim processing workflow.
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