A patient can complete the right exercises and still leave you with the wrong 97110 claim. The real billing test begins after treatment: Do the documented minutes support the units? Does the note establish skilled, medically necessary care? Does the authorization cover the service? Are the provider and modifier requirements satisfied? Does the claim meet the payer’s rules?
With CPT Code 97110, the treatment may be straightforward, but the claim rarely is. When another timed therapy service enters the same session, every minute must be accounted for without overlap. PT and PTA participation can change modifier requirements, while NCCI and MUE edits can stop separate reporting. Behind it all, the plan of care, clinical documentation, and medical necessity must continue to support the service.
This guide tracks 97110 from the therapist’s treatment minutes to the payer’s final adjudication, covering unit calculation, medical necessity, modifiers, authorization, and the billing gaps that can cost providers reimbursement.
What Is CPT Code 97110?
CPT 97110 is a timed therapeutic procedure for exercises designed to improve strength, endurance, range of motion, and flexibility. It is reported in 15-minute units.
The important distinction is that 97110 does not describe exercise simply because a patient is moving, stretching, or using resistance equipment. The service must function as a therapeutic intervention tied to the patient’s condition, treatment goals, and skilled plan of care. CMS specifically states that the documentation should connect the procedure to a specific therapeutic goal and support why the intervention is reasonable and necessary.
A defensible CPT Code 97110 claim requires consistency between what was performed, why it was performed, how skilled care was applied, and how much treatment time was provided. These details should reconcile across the treatment record and claim, ensuring that documented minutes accurately support the units reported.
Medicare vs. Other Payers: The timed-unit and 8-minute-rule discussion in this guide reflects Medicare outpatient therapy billing. Commercial, Medicaid, workers’ compensation, and other payers may apply different unit, authorization, modifier, or documentation requirements. Always verify the applicable payer’s policy before submitting a claim.
What Services Support CPT 97110?
Not every exercise performed during a therapy session belongs to a CPT Code 97110 claim. The key question is whether the exercise addresses a documented impairment and is provided as part of the patient’s therapeutic plan.
An exercise becomes defensible under CPT Code 97110 when the record shows why it was chosen, how it was delivered, and how it was progressed. The intervention should address a documented impairment, including weakness, restricted motion, reduced flexibility, or impaired endurance, while the therapist applies clinical judgment to adjust resistance, repetitions, intensity, and progression according to the patient’s functional status and response.
What Can Support CPT Code 97110?
- Strengthening: Progressive resistance exercises used to address documented weakness or impaired functional strength.
- Range of Motion Training: Therapeutic movement, including active or active-assisted exercise, used to address a documented mobility restriction.
- Flexibility Training: Targeted stretching or flexibility exercises addressing a documented limitation that affects movement or function.
- Endurance Training: Graded therapeutic exercise used to improve reduced activity or exercise tolerance identified in the treatment plan.
- Progressive Exercise: Exercises advanced, reduced, or modified based on the patient’s strength, tolerance, movement quality, or functional response.
The record should identify the exercise performed, the impairment addressed, and the therapist’s relevant skilled input, such as instruction, cueing, assistance, or progression.
CPT 97110 vs. 97112, 97140, 97530, and 97150
The coding question is not simply whether exercise was performed. A therapy session may include 97110 along with neuromuscular reeducation, manual therapy, or therapeutic activities. When multiple services are provided, each must be identified by the intervention performed, its therapeutic purpose, and the time documented for that service. Do not select the code based solely on the equipment, exercise, or body part involved. The documentation should clearly establish the purpose of each reported procedure and its connection to the patient’s treatment goals.
CPT 97110 vs. 97112: Therapeutic Exercise vs. Neuromuscular Reeducation
CPT 97110 is used for therapeutic exercise to develop strength, endurance, range of motion, and flexibility. 97112 is reported for reeducating brain-to-nerve-to-muscle function.
The distinction becomes important when an intervention contains both strengthening and motor-control elements. The biller should not select 97112 just because balance, coordination, or movement control is involved. The documentation should identify the specific therapeutic objective and intervention performed.
CPT 97110 vs. 97140: Therapeutic Exercise vs. Manual Therapy
CPT Code 97140 represents therapy using manual techniques, reported in 15 minutes. It should not be used merely because the therapist physically assists or positions the patient during an exercise.
For example, therapeutic exercise performed with therapist assistance remains distinct from a separately performed manual-therapy intervention. The treatment record should identify the manual technique and its separate therapeutic purpose when both codes are reported.
CPT 97110 vs. 97530: Therapeutic Exercise vs. Therapeutic Activities
97110 focuses on therapeutic exercise to improve strength, endurance, ROM, or flexibility. CPT 97530 focuses on dynamic, functional activities designed to improve performance in activities or tasks. The documentation should support the primary purpose of the intervention rather than relying on the equipment used or the body part treated.
CPT 97110 vs. 97150: Individual vs. Group Therapy
97150 represents a therapeutic procedure provided in a group setting. CMS requires documentation of the purpose of the group, number of participants, and skilled activity provided.
The Critical Billing Control: Never Count the Same Minutes Twice
Before billing CPT Code 97110 alongside another time therapy code, add the documented minutes for all timed services. CMS provides an example involving 7 minutes each of 97110, 97112, and 97140. Although three procedures were performed, the session contains only 21 timed minutes and supports one billable timed unit.
Each service should have its own documented intervention and treatment time, but those minutes cannot be reused to generate additional units.
CPT 97110 Is a Timed Code: Understanding the 15-Minute Rule
CPT Code 97110 is reported in 15-minute units, so documented treatment time directly affects the number of units that can be billed. For Medicare, the calculation is based on the total time spent furnishing all applicable timed therapy services for the same discipline on the same date of service.
The Medicare timed-code framework generally follows these intervals.
| Total timed Treatment Minutes | Billable units |
| 8–22 minutes | 1 |
| 23–37 minutes | 2 |
| 38-52 minutes | 3 |
| 53–67 minutes | 4 |
| 68–82 minutes | 5 |
| 83–97 minutes | 6 |
The pattern continues in 15-minute increments. When total timed treatment is less than 8 minutes, Medicare does not allow a timed unit for that session.
The 8-Minute Rule Is Not: “8 minutes of 97110 = 1 unit.”
This is where 97110 is frequently oversimplified. The 8-minute threshold applies to the total timed treatment minutes for the discipline, not automatically to each CPT code separately. When multiple timed services are performed, their minutes are first combined to determine the total number of units available. Those units are then allocated among the individual services based on the documented time for each procedure.
What Time Counts?
Only time spent furnishing the applicable timed therapy service should enter the unit calculation. Waiting for equipment, waiting for treatment to begin, or time during which the patient performs an activity independently without the required skilled therapist contact should not be counted as timed treatment minutes.
Billed units must reflect the actual treatment time documented in the therapy record. A routine 15-minute assumption should never replace the recorded treatment time.
How to Calculate CPT 97110 Units
When 97110 is billed with another timed therapy code, first determine the total units supported by the combined treatment minutes. Then allocate those units according to the documented minutes and applicable CMS rules.
For example:
97112: 24 minutes = 1 full block + 9 minutes
97110: 23 minutes = 1 full block + 8 minutes
Total: 47 minutes = 3 billable units
The 47 total timed minutes support 3 units. Each service has one completed 15-minute block, leaving 9 minutes for 97112 and 8 minutes for 97110. The third unit is allocated to 97112 because it has the greater remaining time.
Final billing: 97112 × 2 and 97110 × 1.
Do not calculate 97110 units independently and then add units for other timed services. The total units reported must remain within the amount supported by the session’s documented timed treatment.
Same-Day Timed Services: Where CPT 97110 Billing Gets Complicated
A therapy visit may include 97110 with 97112, 97140, or 97530. When multiple timed procedures are reported, the record should distinguish the intervention, its therapeutic purpose, and the time attributable to each service. The same minutes cannot support multiple CPT codes.
For example, 20 minutes of 97110 plus 20 minutes of 97530 equals 40 total timed minutes. Under Medicare’s timed-service methodology, that supports 3 units for the session overall, not 3 units for each CPT code.
Keep the Interventions Distinct
Consider a session that includes the following.
97110: strengthening for documented lower-extremity weakness
97140: manual therapy addressing restricted joint mobility
97530: task-specific activity to improve functional performance
These services may be appropriate on the same claim, but the treatment note should distinguish the work performed and why each intervention was needed. Equipment, body region, or diagnosis alone should not be used to justify separate timed codes.
Before submitting a claim, reconcile the treatment note against the claim line by line. The documented interventions, timed minutes, units, and reported CPT codes should tell the same story.
CPT 97110 Documentation and Medical Necessity
A 97110 treatment note should do more than list exercises. The clinical record should allow a reviewer to understand the impairment being treated, the therapeutic purpose of the exercise, the skilled care provided, and the patient’s response to treatment. For Medicare, the documentation must also support the total timed treatment minutes used to determine the billed units. A strong 97110 record should establish:
- Functional Limitation: Identify the documented deficit being treated, such as reduced strength, limited range of motion, decreased flexibility, or impaired endurance, and explain its effect on the patient’s functional performance.
- Therapeutic Purpose: Identify the exercises performed and how they address the patient’s impairments and treatment goals. The intervention should have a clear connection to the established plan of care.
- Skilled Intervention: Document the therapist’s relevant clinical involvement, such as instruction, cueing, assistance, progression, regression, or modification based on the patient’s condition and response.
- Treatment Parameters: Record relevant exercise parameters, such as resistance, repetitions, sets, duration, or other details needed to describe the intervention and support the clinical rationale.
- Patient Response: Document the patient’s tolerance and response to treatment, including changes or observations that inform progression, modification, or continued skilled care.
- Treatment Time: Document the total timed treatment minutes used to support the billed units. When multiple timed services are provided, the documented time must support the total units reported across those services.
A note that simply states “therapeutic exercises performed” does not adequately explain the clinical purpose or skilled nature of the service. The documentation should connect the exercise, the patient’s functional limitation, the therapist’s clinical involvement, and the treatment goals into a consistent record supporting medical necessity.
Plan of Care, Certification & Recertification
A well-documented 97110 session can still hit a billing roadblock if the plan of care does not support the service. The plan establishes the clinical framework for treatment and gives the billed exercise a documented place within the patient’s rehabilitation course.
For Medicare, the plan of care should specify the type of therapy, treatment goals, and planned frequency and duration of services. CPT Code 97110 should be consistent with that plan and the patient’s documented treatment needs.
The plan of care must be certified by the appropriate physician or NPP within the applicable Medicare requirements. When ongoing treatment requires recertification, the records must also support continued services or any relevant changes to the treatment plans.
From an RCM standpoint, watch for missing certification, expired certification periods, unsupported changes, or 97110 services that fall outside the established plan. These administrative gaps can disrupt payment even when the exercise itself was clinically appropriate.
CPT 97110 Modifiers: When the Claim Requires More Than the CPT Code
CPT Code 97110 tells Medicare “what was performed”. The modifier adds the missing billing details: who performed it, under what circumstances, and which Medicare rules govern the claim.
- Modifier GP: Reports services furnished under an outpatient physical therapy plan of care.
- Modifier CQ: Applies when a PTA furnishes a portion of a PT service independently and the applicable Medicare de minimis rules are met. Generally, the CQ modifier is required when the PTA’s independently furnished portion exceeds the 10% de minimis standard. CMS also has exceptions for certain final-unit and two-unit scenarios, so CQ determination should be based on the specific service and time distribution
- Modifier KX: For CY 2026, the threshold is $2,480 for PT and SLP combined and $2,480 for OT. Once the applicable threshold is exceeded, Modifier KX confirms that continued therapy is medically necessary and supported by the medical record. Claims for services above the threshold without the KX modifier are denied.
- Modifier 59/X: Report only when 97110 represents a distinct procedural service that meets the applicable NCCI criteria. They should never be used simply to bypass an edit or obtain separate payment.
- PT/PTA Time and CQ: For timed CPT 97110, who furnished the minutes matters. If the PTA independently provides more than 10% of the service or unit, CQ generally applies with GP. CMS also provides exceptions for certain final-unit scenarios under the 8-minute rule and specific two-unit situations.
For example, CMS shows a 97110 scenario with 10 PTA minutes and 5 PT minutes. The 15-minute service is billed as 1 unit with the CQ modifier.
Documentation should clearly capture PT and PTA minutes, the service performed, and who furnished each portion. CQ is not determined simply by the presence of a PTA on the treatment team.
KX Threshold vs. Medical Review
For CY 2026, the Medicare KX modifier threshold is $2,480 for physical therapy and speech-language pathology combined and $2,480 for occupational therapy. The threshold is not a coverage limit. Medically necessary therapy may continue beyond it when the services remain reasonable and necessary, the medical record supports continued treatment, and the KX modifier is reported as required.
The $3,000 Medical Record (MR) threshold is separate from the KX threshold. It is used as part of Medicare’s targeted medical review process and does not mean that every claim exceeding $3,000 will automatically be reviewed.
From an RCM perspective, the key control is to distinguish the payment threshold from the medical-review threshold and ensure the KX modifier is supported by the patient’s clinical record when required.
The billing rule is straightforward: use the modifier to describe the actual service, not to manufacture payment eligibility.
CPT 97110 Authorization: The Hidden Claim Stopper
A correctly coded 97110 claim can still stop at the payer’s authorization check. The issue is often not the exercise itself, but whether the billed service matches what the payer actually approved
Before billing, verify:
- Coverage: Confirm the active PT benefits and whether the patient’s plan requires prior authorization for CPT Code 97110.
- Authorized Services: Match the approved CPT code, visit count, units, frequency, and treatment dates to the services delivered.
- Authorization Window: Ensure every 97110 session falls within the authorization’s effective dates. An expired authorization can turn an otherwise payable service into a denial.
- Utilization: Track approved visits and units against those already used. Do not assume remaining visits automatically mean remaining units.
- Changes: Obtain an extension or updated authorization before exceeding approved visits, units, documentation, and approved treatment dates.
CPT 97110 NCCI & MUE Edits: When Separate Billing Gets Blocked
A CPT Code 97110 claim can be correctly coded yet fail an NCCI edit when another therapy procedure is reported for the same encounter. Understanding the edit prevents inappropriate unbundling and modifier usage.
- NCCI PTP Edits: Identify code pairs that Medicare generally does not allow to be reported together. When an edit is modifier-eligible, separate reporting requires documentation showing that the services were distinct and met the applicable NCCI criteria.
- MUE (Medically Unlikely Edit): Sets the number of units ordinarily allowed for a CPT code for the same beneficiary, provider, and date of service. MUEs establish the number of units ordinarily allowed for a code on the same date of service. Exceeding an MUE can trigger claim-level edits, and exceptions depend on the applicable MUE adjudication rules and documentation.
- 59/X modifiers: Use only when the services are genuinely distinct, and the circumstances support separate reporting. A modifier should not be added simply to override an NCCI edit.
For CPT Code 97110, the billing checkpoint is straightforward: review applicable NCCI edits and MUEs before submission, then let the documentation determine whether separate reporting is supportable.
CPT 97110 Reimbursement: Why Correct Coding Does Not Guarantee Full Payment
A clean CPT Code 97110 claim can still pay less than expected. Coding determines what was billed; the payer’s reimbursement methodology determines what gets paid.
The fee schedule does not always tell the whole payment story for CPT 97110. Locality and place of service set the baseline; multiple therapy services can change what Medicare ultimately pays. Under MPPR, the practice-expense component of subsequent eligible services is reduced after the first eligible service. A lower payment in this situation does not necessarily signal an error. It may simply reflect Medicare’s payment methodology.
For commercial payers, payment depends largely on the provider’s contract, negotiated rates, fee schedule, place of service, and payer-specific reimbursement rules.
A payment below the expected amount is not automatically an underpayment. RCM teams should first reconcile the allowed amount, payer payment, contractual adjustment, and patient responsibility, then account for adjustments such as MPPR. Only unexplained variances should move forward for underpayment investigation.
Common CPT 97110 Denials and Their Root Causes
A CPT Code 97110 claim can be correctly coded yet still be denied when the record does not support medical necessity, billed units exceed documented treatment time, required authorization is missing or exhausted, applicable modifiers are incorrect, or the service falls outside the patient’s coverage. The most common denial points include:
- Medical Necessity: Documentation does not sufficiently link 97110 to the patient’s documented impairments, functional deficits, and therapeutic goals.
- Insufficient Documentation: Missing or incomplete details, including skilled care, exercise parameters, treatment time, patient response, or plan-of-care alignment, can leave the service unsupported.
- Authorization Issues: The service exceeds approved visits, units, treatment dates, or other authorization parameters.
- Incorrect or Missing Modifiers: Required modifiers such as GP, CQ, or KX are missing, incorrect, or unsupported by the documentation.
- Excessive or Unsupported Units: Billed units do not align with documented treatment time or applicable payer rules.
- NCCI Edits: 97110 is reported with another procedure that creates an edit without sufficient documentation to support separate reporting.
- Plan-of-care Issue: The service falls outside the documented plan of care or required certification and recertification requirements.
- Eligibility or Coverage: The patient’s benefits do not cover the service, or applicable therapy coverage requirements are not met.
From an RCM perspective, these denials are often preventable workflow failures rather than isolated billing errors. Connecting authorization, documentation, coding, and claim review before submission can address the issue upstream.
Concluding Words
CPT 97110 reimbursement depends on more than selecting the correct code. Documented medical necessity, skilled intervention, treatment minutes, units, modifiers, authorization, and payer edits must align from treatment through claim submission.
A missing authorization, unsupported unit, incorrect modifier, or documentation gap can turn an appropriate therapy service into a denial or payment variance. Accurate coding is only one part of a payable claim.
RCM Workshop helps providers strengthen these billing controls, reduce preventable revenue leakage, and improve reimbursement across the workflow. Book a free consultation to see how RCM Workshop can help reduce preventable denials and payment leakage.
