Documentation & Coding Requirements for Therapeutic Exercises (CPT 97110)

Therapeutic exercise is a cornerstone of rehabilitation care and CPT 97110 is one of the most frequently billed therapy codes in outpatient settings. It’s also one of the most misunderstood and closely audited.

At first glance, CPT 97110 seems straightforward: exercises to improve strength, range of motion, or flexibility. But payers don’t reimburse based on intent alone. They pay based on apparent medical necessity, skilled intervention, accurate time reporting, and defensible documentation.

This guide walks you through every documentation and coding requirement for CPT 97110, step by step. You’ll learn what the code really represents, how payers interpret it, what must appear in your notes, and how to avoid common mistakes that lead to denials or audits.

Whether you’re a physical therapist, occupational therapist, practice manager, or biller, this guide is designed to help you bill CPT 97110 correctly—and confidently.

What is CPT 97110

Before documenting or billing CPT 97110, it’s essential to understand what the code actually represents in payer terms—not just clinical terms.

CPT 97110 is defined as therapeutic exercises to develop strength, endurance, range of motion, and flexibility, provided through direct one-on-one patient contact.

This is not a passive service. It is not general exercise supervision. And it is not a catch-all therapy code.

CPT 97110 requires skilled clinical involvement, meaning the provider’s expertise directly impacts how the exercise is performed, progressed, or modified.

Key elements embedded in the code definition include:

• Active participation by the patient
• Direct one-on-one provider involvement
• Exercises designed to address a specific functional deficit
• Skilled instruction, cueing, or modification
• Time-based billing in 15-minute units

If any of these elements are missing, the service may not meet billing requirements—even if therapeutic exercise was performed.

Who Can Bill CPT 97110

CPT 97110 is primarily used in rehabilitation and musculoskeletal care, but not every provider can bill it under every payer.

Eligibility depends on provider type, supervision rules, and payer policy.

Providers who commonly bill CPT 97110 include:

• Physical Therapists (PTs)
• Occupational Therapists (OTs)
• Therapy assistants (PTAs/OTAs), when permitted and properly supervised
• Chiropractors, in limited cases, depending on the scope and payer rules

Important considerations:

• Medicare has strict supervision and documentation requirements for therapy assistants
• Some commercial payers limit or exclude assistant billing
• Scope of practice laws vary by state

Before billing CPT 97110, confirm:

• The provider is credentialed for therapy services
• The service falls within the scope of practice
• Payer-specific rules allow reimbursement

Time-Based Billing Rules for CPT 97110

Time is one of the most critical—and most scrutinized—components of CPT 97110 billing.

Because this is a timed code, documentation must clearly support the number of units billed.

CPT 97110 time structure:

• Billed in 15-minute units
• Requires direct one-on-one time
• Time must be medically necessary and skilled

The Medicare 8-Minute Rule

Medicare applies the 8-minute rule to CPT 97110.

Under this rule:

• 8–22 minutes = 1 unit
• 23–37 minutes = 2 units
• 38–52 minutes = 3 units
• 53–67 minutes = 4 units

Anything under 8 minutes is not billable.

Commercial Payer Time Rules

Commercial insurers may:

• Follow the 8-minute rule
• Require full 15-minute increments
• Apply proprietary time thresholds

Because regulations vary, always verify payer-specific time policies.

Medical Necessity: The Foundation of CPT 97110 Documentation

Medical necessity is the first thing payers look for when reviewing CPT 97110 claims.

If the documentation does not clearly explain why skilled therapeutic exercise is required, the claim is vulnerable, no matter how well everything else is documented.

Medical necessity must explain:

• The patient’s condition or impairment
• The functional limitation caused by that condition
• Why is therapeutic exercise appropriate
• Why skilled care is required instead of independent exercise

Strong documentation connects:

• Diagnosis → impairment → functional deficit → skilled intervention

Examples of medical necessity statements:

• Exercises required to restore knee strength following total knee arthroplasty
• Therapeutic exercise is needed to address balance deficits contributing to fall risk
• Skilled instruction is necessary to prevent improper movement patterns and injury

Avoid vague statements that do not justify skilled care.

Detailed Description of Therapeutic Exercises Performed

Payers expect to see exactly what was done, not just that “therapeutic exercise” occurred.

Generic language is one of the fastest ways to trigger downcoding or denials.

Documentation should clearly include:

• Type of exercise performed
• Body part or muscle group targeted
• Purpose of the exercise

Examples of acceptable descriptions:

• Standing hip abduction to improve lateral hip stability
• Seated knee extensions to increase quadriceps strength
• Shoulder flexion exercises to improve overhead reach

Dosage, Intensity, and Progression

Therapeutic exercise is not static. Payers expect to see measurable effort and progression over time.

Documenting dosage and intensity proves that the exercises are purposeful and tailored to the patient’s condition.

Dosage elements to include:

• Number of sets
• Number of repetitions
• Resistance level or weight
• Duration or hold time

Progression indicators:

• Increased resistance
• Improved endurance
• Reduced assistance
• Enhanced control or form

Example:

• 3 sets of 10 repetitions with a moderate resistance band, progressed from the prior visit

Failure to show progression over multiple visits can raise audit concerns.

Skilled Intervention: What Makes CPT 97110 Billable

This is the most important—and most frequently missed—documentation element.

CPT 97110 is only billable when skilled clinical judgment is required.

If the patient could safely perform the exercise independently, the service may not qualify.

Skilled intervention includes:

• Verbal cueing to correct posture or movement
• Tactile cueing to facilitate muscle activation
• Manual assistance for safety or control
• Exercise modification due to pain or limitations
• Clinical decision-making during performance

Documentation should answer:

• What did you do that required training and expertise?

Example:

• Provided verbal and tactile cueing to correct knee alignment and prevent joint strain

Without this detail, payers may view the service as unskilled supervision.

Patient Response and Functional Progress

Every CPT 97110 note should include the patient’s response to treatment.

This shows effectiveness, supports continued care, and reinforces medical necessity.

Patient response documentation may include:

• Pain levels during or after exercise
• Fatigue or tolerance
• Improved performance or control
• Limitations or adverse responses

Functional progress examples:

• Improved balance during standing exercises
• Increased endurance with reduced rest breaks
• Improved joint control compared to prior sessions

Even when progress is slow, documenting response matters.

Time Documentation and Unit Support

Time documentation ties everything together.

Without transparent time reporting, even excellent clinical documentation can fail.

Best practices for time documentation:

• Clearly state the total one-on-one time
• Ensure time matches units billed
• Avoid rounding or estimating time

Example:

• 27 minutes of direct one-on-one therapeutic exercise provided

This supports billing two units under the 8-minute rule.

Differentiating CPT 97110 from Similar Codes

Incorrect code selection is a common cause of payment issues.

CPT 97110 must be used appropriately and not as a substitute for other therapy codes.

CPT 97110 vs CPT 97530 (Therapeutic Activities)

• 97110: Isolated exercises targeting strength or ROM
• 97530: Functional, task-based activities (lifting, reaching, transfers)

CPT 97110 vs CPT 97112 (Neuromuscular Reeducation)

• 97110: Strength and flexibility focus
• 97112: Balance, coordination, proprioception

Choose the code that best reflects the service’s primary intent.

Modifiers Commonly Used with CPT 97110

Modifiers play an essential role in therapy billing and compliance.

GP and GO Modifiers

• GP: Physical therapy plan of care
• GO: Occupational therapy plan of care

Required by Medicare and many commercial payers.

59 and X Modifiers

Used when:

• Multiple timed services are billed on the same day
• Services are distinct and separately documented

Modifiers must be supported by documentation and may not be used to bypass rules.

Medicare-Specific Documentation Expectations

Medicare applies heightened scrutiny to CPT 97110.

Documentation must clearly support:

• Reasonable and necessary care
• Skilled intervention
• Ongoing progress or justification for continued therapy

Medicare expects:

• Clear functional goals
• Evidence that the patient cannot self-direct exercises
• Justification for continued skilled care

Failure to meet these expectations can result in recoupment or an audit.

Common Errors for CPT 97110 and How to Avoid Them

CPT 97110 is one of the most frequently billed therapy codes and also one of the most commonly reviewed. Most denials, downcoding, and audit issues don’t occur because care was inappropriate—they occur because the documentation failed to support the service clearly.

Understanding the most common errors helps you fix problems before claims go out the door. This section breaks down where providers go wrong and what clean, compliant documentation should look like instead.

Error 1: Failing to Establish Medical Necessity

One of the biggest reasons CPT 97110 claims are denied is the absence of clear medical necessity. Payers must see why skilled therapeutic exercise is required, not just that exercises were performed.

When medical necessity is vague or missing, the service appears optional or unskilled—even if it wasn’t.

How to avoid this error:

• Clearly link the exercise to a diagnosis or impairment
• Describe the functional limitation being addressed
• Explain why skilled care is required, not just exercise
• Avoid generic statements that could apply to any patient

Better documentation approach:

• Tie exercises to gait instability, fall risk, post-surgical weakness, or limited ADLs
• Use functional language, not just clinical terms
• Show that the patient cannot safely or effectively self-direct the activity

Error 2: Using Vague or Generic Exercise Descriptions

Phrases like “therapeutic exercises performed” or “LE strengthening” are red flags for payers. These statements do not demonstrate intent, skill, or specificity—and they don’t prove the service meets the requirements for CPT 97110.

Generic documentation suggests routine or unskilled activity.

How to avoid this error:

• Name the actual exercises performed
• Identify the body part or muscle group
• State the purpose of each exercise

Instead of writing:

• “Ther-ex performed”

Document like this:

• “Standing hip abduction exercises performed to improve lateral hip stability for gait.”

Specific language strengthens medical necessity and coding accuracy.

Error 3: Missing or Inaccurate Time Documentation

CPT 97110 is a timed code, yet time is one of the most commonly missing or inaccurate elements in documentation.

Without transparent time reporting, payers cannot validate the number of units billed.

How to avoid this error:

• Document the total one-on-one time spent on therapeutic exercise
• Ensure time supports the number of units billed
• Follow the correct time rule for the payer (8-minute rule vs full increments)

Best practice:

• Clearly state time in minutes, not estimates
• Avoid overlapping time with other timed services
• Ensure your documentation and billing match exactly

Time must be defensible, not assumed.

Error 4: Billing Without One-on-One Skilled Care

CPT 97110 requires direct one-on-one contact. If the patient performs exercises independently without active supervision or intervention, the service may not qualify for billing.

This is a common issue in busy clinics where therapists multitask.

How to avoid this error:

• Ensure the provider is actively involved during the exercise
• Document verbal, tactile, or manual cueing
• Avoid billing 97110 for unsupervised or group exercise time

Documentation should show:

• Active instruction
• Ongoing correction or modification
• Continuous clinical involvement

If skilled care isn’t present, the code isn’t supported.

Error 5: Not Demonstrating Skilled Intervention

This is one of the most critical—and most overlooked—errors.

Payers don’t pay for exercise alone. They pay for clinical skill.

If your documentation doesn’t show the required professional expertise, the service may be downcoded or denied.

How to avoid this error:

• Describe what you did that required training and judgment
• Include cueing, corrections, and safety interventions
• Explain how you modified exercises based on patient response

Examples of skilled intervention to document:

• Verbal cueing to correct posture or alignment
• Tactile cueing to improve muscle activation
• Manual assistance for safety or control
• Adjustments due to pain, fatigue, or balance deficits

Skilled intervention must be obvious—not implied.

Error 6: No Documentation of Progress or Patient Response

Repeated notes that look identical week after week raise immediate audit concerns. Payers expect to see change over time, even if progress is slow.

Without documenting response or progression, continued therapy becomes difficult to justify.

How to avoid this error:

• Document how the patient tolerated exercises
• Note improvements or ongoing limitations
• Show progression in resistance, reps, or control

Patient response may include:

• Pain levels
• Fatigue
• Improved form or endurance
• Need for less assistance

Even minor improvements support continued skilled care.

Error 7: Lack of Exercise Progression Over Time

Therapeutic exercise should evolve as the patient improves. When exercises remain unchanged across multiple visits, payers may question whether skilled care is still needed.

How to avoid this error:

• Progress resistance, repetitions, or complexity when appropriate
• Document why progression did or did not occur
• Explain setbacks or barriers when progress is limited

Progression examples:

• Increased resistance band level
• Increased repetitions with improved control
• Reduced verbal or manual cueing

Progression shows intent, skill, and ongoing medical necessity.

Error 8: Incorrect Code Selection (97110 vs Other Therapy Codes)

CPT 97110 is often misused when another therapy code would be more accurate.

Using the wrong code—even with good documentation—can lead to denials or recoupments.

How to avoid this error:

• Match the code to the primary intent of the service
• Do not choose codes based on reimbursement alone

Common comparisons:

• 97110: Isolated strengthening or ROM exercises
• 97530: Functional, task-based activities
• 97112: Balance, coordination, neuromuscular control

Choose the code that best reflects what you actually did.

Error 9: Overlapping Time Between Multiple Timed Codes

When billing more than one timed therapy code on the same date, each minute may only be counted once.

Double-counting time is a serious compliance issue.

How to avoid this error:

• Clearly separate the time spent on each service
• Ensure total minutes align with total units billed
• Use modifiers only when services are distinct and documented

Accurate time allocation protects against audits and repayments.

Error 10: Improper or Unsupported Modifier Use

Modifiers are often misunderstood and misused, especially when billing multiple therapy services.

Using a modifier without documentation support can be just as problematic as not using one at all.

How to avoid this error:

• Use GP or GO modifiers as required by the payer
• Apply 59 or X modifiers only when services are truly distinct
• Ensure documentation clearly supports modifier use

Modifiers should clarify care, not force payment.

Error 11: Copy-Paste or Template Overuse

Templates can improve efficiency, but overuse can result in repetitive documentation that looks identical across visits.

This is a common trigger for audits.

How to avoid this error:

• Customize each note to reflect the specific visit
• Update exercises, response, and progression
• Avoid cloning entire sections without edits

Your documentation should tell the story of that day’s care.

Error 12: Assuming the Code “Speaks for Itself”

Many providers assume that billing CPT 97110 automatically explains what was done. It doesn’t.

Payers rely entirely on documentation—not code descriptions.

How to avoid this error:

• Assume the reviewer knows nothing about the visit
• Clearly explain the service in plain, functional language
• Support every billed unit with documentation

If it isn’t written, it didn’t happen—at least to the payer.

Conclusion

CPT 97110 may be one of the most commonly used therapy codes, but it’s also one of the easiest to get wrong. Small documentation gaps—missing time, vague exercise descriptions, or unclear skilled intervention—can quietly lead to denials, downcoding, or audit risk. Over time, those small issues add up to lost revenue and unnecessary administrative stress.

The good news is that most CPT 97110 problems are preventable. When your documentation clearly demonstrates medical necessity, one-on-one skilled care, accurate time reporting, and patient progress, your claims become easier to defend and easier to pay. Strong documentation doesn’t just satisfy payers—it reflects the quality of care you provide and protects the financial health of your practice.

Consistency, clarity, and compliance are what separate clean claims from costly rework. Getting CPT 97110 right is not about writing more—it’s about documenting smarter.

Turn Compliant Documentation into Reliable Revenue

Medix Revenue Group helps therapy practices eliminate denials, reduce audit risk, and capture every dollar they earn—without slowing down clinical workflows.

We have highly skilled billing specialists and certified professional coders to provide physical therapy billing services and help you streamline your billing workflow for ultimate financial success. We work alongside your clinicians and billing staff to ensure services are coded correctly, documentation supports every unit billed, and payer rules are followed the first time.

With Medix Revenue Group, you get:

• Expert review of therapy documentation for CPT 97110 compliance
• Accurate time-based coding and modifier support
• Medicare and commercial payer rule alignment
• Denial prevention and AR follow-up focused on therapy claims
• Ongoing guidance to strengthen documentation without adding burden

If you’re tired of guessing whether your CPT 97110 claims will pass review, it’s time for a smarter approach to revenue cycle management.

Medix Revenue Group turns strong clinical care into clean claims—and clean claims into consistent revenue.

Let’s Protect Your Documentation, Your Reimbursements, And Your Peace Of Mind. Contact us now!