Occupational Therapy Billing Updates for 2026: CPT Codes, Medicare Changes & Compliance Guidelines

Are you confident that your occupational therapy billing processes can keep up with the evolving requirements of 2026, or could small inaccuracies be affecting your revenue?

Did you know? The claim denial rates often range between 5% and 10%, and studies suggest that nearly 90% of these denials are preventable with accurate coding and documentation. These numbers highlight how even minor gaps can create significant financial impact over time.

As reimbursement models continue to evolve under the guidance of the Centers for Medicare & Medicaid Services, the need for precision in therapy billing is becoming increasingly important.

This blog breaks down the key Occupational Therapy billing updates for 2026, including CPT code changes, Medicare policy updates, and essential compliance guidelines providers need to understand to maintain accuracy and financial stability.

Occupational Therapy CPT Codes

The 2026 CPT update includes 288 new codes, 84 deletions, and 46 revisions. In fact, some changes may indirectly affect occupational therapy through interdisciplinary services. Billing teams must review updates carefully and ensure systems are aligned with the latest coding structure.

• Evaluation Codes (97165–97168)

Evaluation codes 97165–97167 must be billed as a single unit, even when services extend across multiple days. Code 97168 applies only when a significant clinical change occurs. Documentation must clearly justify the level of evaluation and support the need for reassessment.

• Treatment Codes (97110, 97530, 97535)

Codes 97110, 97530, and 97535 remain commonly used but face increased scrutiny. Each service must be supported by accurate time tracking and clear functional goals. Documentation should reflect skilled therapy interventions to justify medical necessity and ensure correct reimbursement.

• Modifier Usage (GP, CQ/CO)

Modifiers play an essential role in therapy billing. The GP modifier identifies services under an occupational therapy plan of care. CQ/CO modifiers indicate services provided by therapy assistants. As a result, incorrect modifier usage can lead to reduced payments or claim denials.

• Time-Based Coding Rules

Time-based billing continues under the 8-minute rule. Providers must document exact treatment durations and avoid overlapping services. Accurate unit calculation is necessary to prevent underbilling or overbilling, both of which may lead to compliance issues or reimbursement delays.

• Plan of Care (POC) Requirement

A certified Plan of Care is required before billing therapy services. It must be approved by a physician or qualified provider and updated periodically. Missing or outdated certification can result in claim denials and compliance risks during audits.

Occupational Therapy Medicare Changes

Medicare updates create both positive and negative financial effects. Payment increases provide minor benefits, whereas MPPR reduces reimbursement for multiple services. Providers must focus on accurate coding and service planning to maintain steady revenue and minimize financial risks.

• MPPR Policy (50% Reduction)

The Multiple Procedure Payment Reduction continues with a 50% reduction on the practice expense of additional therapy services provided on the same day. As a result, correct sequencing of services is necessary to ensure accurate reimbursement and avoid unintended revenue loss.

• Conversion Factor Updates

Payment adjustments for 2026 include a 0.75% increase for qualified APM participants and a 0.25% increase for others. These updates slightly improve reimbursement rates. Providers should evaluate how these changes impact overall revenue and service profitability.

• Therapy Thresholds

Therapy thresholds remain in place, requiring the KX modifier once spending exceeds the set limit. Providers must monitor therapy costs throughout the year. Accurate tracking ensures correct modifier application and helps prevent compliance issues or rejected claims.

• Cost-Sharing Structure

The cost-sharing system continues to follow the 2006-based structure. This affects how patient financial responsibility is calculated. Billing teams must ensure accurate patient billing to avoid disputes and maintain transparency in payment processes.

• APM Participation Impact

Alternative Payment Model participation continues to influence reimbursement. Qualified participants receive higher updates and benefit from value-based incentives. This model encourages quality care and efficiency, making participation an important consideration for long-term financial planning.

Occupational Therapy Compliance Guidelines

Compliance requirements for 2026 place strong emphasis on accurate documentation, correct modifier usage, and adherence to updated billing rules. Providers must ensure that every service billed is medically necessary, properly documented, and aligned with current regulations. Thereby, consistent monitoring and structured processes are essential to reduce audit risks, prevent denials, and maintain smooth revenue flow.

• KX Modifier Requirements

The KX modifier is required when therapy services exceed the annual threshold. Its use confirms that services remain medically necessary. Documentation must clearly justify continued treatment, as incorrect usage can trigger audits and increase the risk of claim denials.

• Medical Necessity Documentation

Documentation must clearly show that services are skilled and necessary. In fact, notes should include patient condition, treatment goals, and measurable outcomes. Strong documentation supports claim approval and reduces the risk of audits or payment delays.

• Progress Reports & Recertification

Progress reports must be completed at regular intervals, such as every ten visits. Plan of Care recertification is also required periodically. Missing these updates can result in non-compliance and denied claims, making timely documentation an essential requirement.

• Audit Risk Areas

There are certain billing practices that are more likely to trigger audits. These include:

• Overuse of 97110 and 97530
• Incorrect time-based unit calculation
• Improper modifier usage
• Regular internal reviews help identify and correct these risks early.
• MPPR Compliance

Correct application of MPPR requires proper ranking of services, with the highest-value procedure billed first. In fact, duplicate or overlapping services must be avoided. Errors in applying MPPR rules can lead to reduced payments and increased claim rejections.

• Technology & Training

Effective compliance depends on proper tools and education. Practices should use billing software to track modifiers, thresholds, and errors. Regular staff training ensures awareness of updated guidelines and improves overall billing accuracy and efficiency.

What’s Next?

Outsourcing has become a practical solution for managing the increasing complexity of Occupational Therapy billing updates in 2026. As regulations from the Centers for Medicare & Medicaid Services continue to evolve, maintaining accuracy through in-house teams alone can be challenging. Therefore, outsourcing occupational therapy billing and coding service providers bring updated knowledge of CPT coding, Medicare policies, and compliance requirements. Additionally, they ensure correct code usage, proper modifier application, and complete documentation. As a result, practices can reduce errors, minimize claim denials, and maintain consistent reimbursement without the need for frequent internal retraining.

Moreover, partnering with experienced providers like 24/7 Medical Billing Services helps improve both efficiency and financial outcomes. These companies use advanced tools and dedicated teams to monitor billing performance and identify revenue gaps. Also, they streamline claim submissions and enhance accuracy across the revenue cycle. Consequently, practices benefit from faster reimbursements and reduced administrative workload. This allows therapists and staff to focus more on patient care while ensuring that billing processes remain compliant, efficient, and aligned with current industry standards.

FAQs

How often should billing processes be reviewed in 2026?

Regular monthly reviews help identify issues early and improve billing performance.

Can outdated billing systems affect reimbursement?

Outdated systems may fail to capture current coding and policy requirements.

Why is internal auditing important for OT billing?

It helps detect errors, improve compliance, and prevent recurring billing issues.

What is the benefit of tracking billing performance metrics?

It helps identify trends, improve decision-making, and optimize revenue cycles.