CPT Code for Physical Therapy Evaluation and Treatment: Code Selection, Levels & Billing Rules

Physical therapy billing begins with accurate clinical documentation, but choosing the right CPT code is what translates that treatment into a claim. For providers, understanding the CPT code for physical therapy evaluation and treatment is especially important because PT services include different evaluation levels, re-evaluations, and timed treatment procedures.

The most common CPT Codes for PT Evaluations are: 97161, 97162 and 97163. These CPT codes are for evaluating a patient for Physical Therapy. CPT 97164 is the CPT code for a PT re-evaluation, once the new patient evaluation requirements have been met. In 2017, CMS replaced the old 97001 and 97002 CPT codes with the new PT Evaluation and Re-evaluation Codes.

You might also be insured along with the use of some for instance 97110 – Therapeutic exercise 97112 – neuromuscular re-education 97116 – gait training 97140 – manual therapy 97530 – therapeutic activities 97535 – self-care or house management coaching.

Choosing a code is not as simple as picking one based on the length of the appointment. The documentation must be supported by complexity, documentation, the service performed and treatment time as well as the medical necessity and the payer’s requirements.

Physical Therapy Evaluation CPT Codes at a Glance

The three primary physical therapy evaluation CPT codes are:

CMS lists 97161, 97162, and 97163 as PT evaluation codes and 97164 as the PT re-evaluation code.  97001 was replaced by the evaluation codes. 97002 was replaced by 97164.

The usual timeframes assist in describing the services, but providers should not choose an evaluation level based just on the number of minutes with the patient. The clinical complexity and required components of the evaluation also matter.

How to Choose Between 97161, 97162 and 97163

The proper PT examination CPT code is determined by the complexity of the patient presentation and level of clinical decision making.

CPT 97161: Low-Complexity Physical Therapy Evaluation

97161 Low complexity PT test It usually is linked with a straightforward clinical presentation when the clinician can visualize the patient and build a plan of care, without anything being complicated.

The documentation should still support the evaluation components required by the code. A simple patient presentation does not mean the note can be brief or incomplete.

CPT 97162: Moderate-Complexity Evaluation

97162 is a mid-level complexity PT test. This level could include a more complex clinical presentation, further examination considerations, or a higher level of clinical decision making.

The record should indicate why the patient presentation met the moderate level, instead than just choosing the code since the appointment was about 30 minutes.

CPT 97163: High-Complexity Evaluation

97163 is employed when evaluating high-complexity PT and the recorded clinical presentation supports that level of decision-making.

A longer appointment does not automatically make 97163 billables. Renders the provider’s evaluation to uncover the complexity contained within the code.

The levels of evaluation stated by CMS guidance are low, moderate and high complexity and the number of face-to-face hours recommended at each level.

What Is CPT 97164?

CPT 97164 is a reevaluation for physical therapy. This is more than just a substitute for a usual progress note.

Re-evaluation may be appropriate when the patient’s condition or plan of care changes and the applicable standards for the code are met. CMS says 97164 is the PT re-evaluation code for an established plan of treatment.

The paperwork must provide the basis for the re-evaluation and how the patient’s current status impacts the treatment plan.

For example, if there is a major change in condition, change in functional status, or other circumstances that require a modification in the plan of care, the therapist may need to re-evaluate the patient.

The fact that the therapist examined the patient’s progress doesn’t automatically make a typical treatment note a 97164.

Evaluation vs. Re-Evaluation: What Is the Difference?

For physical therapy coding, it is crucial to know the difference between an initial evaluation and a re-evaluation.

Initial examination determines patient’s condition, functional limitations, treatment needs and plan of care. A re-evaluation is when you re-assess an existing patient where the circumstances dictate that a formal re-evaluation is warranted.

CMS says that if an evaluation is the only service provided during an episode of care, the evaluation may be considered the plan of care if the necessary information is included.

Billing teams should therefore evaluate the clinical paperwork and not only pick 97164 because the patient has come back for another visit.

Treatment CPT Codes Used After the Evaluation

The evaluation is only one part of the physical therapy billing process. Once treatment begins, the therapist may report different physical therapy treatment CPT codes based on the services actually performed.

These codes should not be selected simply because they are commonly used in PT. The treatment note must support the specific service.

A patient who is doing strengthening exercises may support 97110, and a patient who is doing a functional transfer activity to treat a documented mobility limitation may support 97530 when the code requirements are met.

Matching the CPT Code to the Treatment Performed

Matching the procedure code to the actual procedure is one of the most fundamental elements in physical therapy CPT coding.

Consider a session involving three services:

• Therapeutic exercises to improve lower-extremity strength
• Manual therapy to address restricted mobility
• Functional activities to improve transfers

Different use cases for these services. If the evidence supports each service and payer regulations support separate reporting, the billing record should split them, rather than listing the entire session as “PT treatment.”

This distinction also helps prevent accidental duplication of treatment time.

Providers looking for additional support with professional coding can review Wisconsin Medical Billing’s medical coding services, which include CPT and ICD-10 coding workflows.

Timed vs. Untimed Physical Therapy Services

Another important consideration is whether the CPT code is timed or untimed.

Evaluation codes (97161-97163) are not documented the same as a 15-minute treatment codes. There are a number of treatment services commonly performed by physical therapy that are time-based CPT codes such as 97110, 97112, 97116, 97140 and 97530.

Units for timed treatment services are subject to specific rules applied by Medicare. The billing team should bill according to recorded treatment minutes and the appropriate Medicare methodology, rather than assigning units based on the number of procedures completed.

This is especially significant if there are multiple timed treatment codes on the same claim.

The 8-Minute Rule for Physical Therapy Treatment

The 8-minute rule can affect Medicare billing for timed therapy services.

If indicated, total timed treatment minutes are taken into account by Medicare in calculating the allowable units to be reported. Treatment time should be documented by the therapist for each service, based on the actual treatment time, not estimated on the last units of a visit.

For example, a session might include:

• 12 minutes of therapeutic exercise
• 10 minutes of manual therapy
• 15 minutes of therapeutic activities

The billing team should evaluate the total timed minutes and the applicable Medicare unit methodology before submitting the claim.

Commercial payers may apply different rules. Therefore, a practice should not assume that Medicare’s methodology applies identically to every insurer.

CMS provides current therapy services guidance covering therapy coding, billing policies, annual updates, and Medicare requirements.

Modifiers for Physical Therapy Evaluation and Treatment

Providers can use modifiers to provide more information about a therapy service, but they should not add them automatically.

Medicare requires the GP modifier with PT evaluation and re-evaluation codes to identify services provided under a physical therapy plan of care. CMS has designated the use of GP with the PT eval codes 97161-97164.

Additional modifiers may be added according to the provider, service, payer or claim situation.

For instance, physical therapist assistants providing a therapy service may have additional Medicare reporting responsibilities. CMS’s current therapy guidance should be reviewed when applicable.

The important point is that modifier selection should reflect the actual circumstances of the service and the payer’s requirements.

Documentation That Supports PT Evaluation Codes

Good documentation gives the billing team the information needed to select the correct CPT code for physical therapy evaluation and treatment.

An evaluation note should generally provide enough clinical information to support:

• The patient’s condition
• Relevant history
• Examination findings
• Functional limitations
• Clinical assessment
• Complexity of the presentation
• Treatment goals
• Plan of care
• Frequency and duration of treatment
• Medical necessity

CMS states that PT evaluation codes have specific reporting components, and the medical record must support the service billed.

The documentation should tell the clinical story. A billing professional should be able to understand why the evaluation was performed, what was found, and how those findings led to the treatment plan.

Medical Necessity and Physical Therapy Billing

Evaluation and treatment codes are tightly tied to medical need.

The diagnosis alone does not automatically lead to the conclusion that all therapeutic procedures are suitable. The record should establish a connection between the patient’s condition and the identified functional limitation and should document an explanation as to why skilled therapy is necessary.

Treatment appointment documentation should demonstrate what was completed, why it was completed, how the specialist provided skilled look after and what the patient’s response was.

Is onus on medical necessity and documentation to drive therapy claims says CMS.

Common Physical Therapy Coding Errors

Choosing an Evaluation Level by Time Alone

A 45-minute evaluation does not automatically mean that 97163 is appropriate. The documented complexity and required evaluation components must support the selected level.

Using 97164 for a Routine Follow-Up

A routine progress visit does not necessarily mean a re-evaluation is required. There needs to be evidence from the documentation to justify the requirement of a re-evaluation.

Reporting Treatment Codes Without Clear Distinction

If several treatment codes are reported, the record should distinguish the interventions and their purposes.

Incorrect Timed Units

Billing more units than the documented treatment time supports can create claim problems and potential audit concerns.

Missing the Therapy Modifier

Medicare may require discipline-specific modifiers for treatment codes. Missing or incorrect modifiers can prevent payers from processing claims. Use the GP modifier with the CPT codes listed for PT initial evaluations and subsequent reassessments.

Ignoring Payer-Specific Requirements

Medicare, Medicaid, Medicare Advantage and Commercial payers may have various billing and coverage limitations. What pertains to a patient’s plan should always be verified.

A Practical PT Coding Workflow

Rather than treating evaluation and treatment billing as separate tasks, practices can use a connected workflow:

1. Review the clinical note
   Confirm the diagnosis, findings, functional limitations, and treatment plan.
2. Determine the evaluation level
   Select 97161, 97162, or 97163 based on the documented complexity.
3. Identify whether a re-evaluation is appropriate
   Use 97164 only when the clinical circumstances and documentation support it.
4. Match treatment codes to actual services
   Select codes such as 97110, 97112, 97116, 97140, 97530, or 97535 based on the intervention performed.
5. Review time and units
   Apply the applicable payer’s timed-service rules.
6. Check modifiers
   Confirm discipline, assistant, distinct-service, and other applicable modifier requirements.
7. Verify payer requirements
   Check eligibility, authorization, coverage, and provider enrollment.
8. Submit and monitor the claim
   Watch for rejections, denials, payments and outstanding balances.

This technique enables for the integration of PT coding and invoicing, rather than a separate code selection procedure.

How Physical Therapy Billing Services Support the Revenue Cycle

Physical therapy practices handle various timed services, evaluation types, required authorizations, and payer rules. When billing duties remain in-house, staff may combine these tasks with other administrative functions.

Outsourced physical therapy billing services can support areas such as:

• CPT and ICD-10 coding
• Charge entry
• Eligibility verification
• Authorization tracking
• Claim submission
• Rejection correction
• Denial management
• Payment posting
• A/R follow-up
• Payer communication

Wisconsin Medical Billing’s rehab billing services include All insurance types and Rehab Medical Billing Here Wisconsin Medical Billing specializes in the following areas of rehab medical billing: Physical therapy, occupational therapy, speech therapy; Coding, eligibility, claims processing, denials, payments posting, compliance.

A workflow like this will be a big help when it comes to removing the connection between the clinical documentation and the administrative process of the claim. For a practice considering outsourced physical therapy billing, this workflow streamlines the billing process.

When Should a Practice Consider a Physical Therapy Billing Company?

Are your employees spending all their time sorting out claims, chasing authorizations, tracking down payments or just searching for balances? It’s time to bring in some outside billing help.

Before selecting a billing vendor, ask if they have any knowledge of:

• PT evaluation codes
• Re-evaluation requirements
• Timed treatment codes
• Therapy modifiers
• Medicare billing rules
• Commercial payer differences
• Documentation requirements
• Denial management
• A/R follow-up
• Credentialing and payer enrollment

Physical therapy billing companies that practices are looking to recruit should also be asked how their billing staff deals with code revisions and payer policy changes.

Besides Medical Billing, Wisconsin Medical Billing also offer Coding, Claim Filing, Payment Processing and Revenue Cycle Management.

Credentialing and PT Claim Processing

Correct CPT coding is only one part of a successful claim. Provider enrollment information must also be accurate.

When a therapist comes to a practice, leaves to another, takes on additional payers, or offers new services, expired credentialing may cause administrative headaches, even if the codes were right.

Wisconsin practices can review Medical Credentialing Services as an additional internal resource for payer enrollment and provider credentialing.

This is especially helpful when you have expanding rehab groups with many therapists or several locations.

A/R Follow-Up After PT Claims Are Submitted

Claim submission is not the final step. Unpaid and denied therapy claims need to be tracked until the account is resolved.

A/R teams may need to investigate:

• Coding-related denials
• Missing information
• Authorization issues
• Eligibility problems
• Documentation requests
• Incorrect payer processing
• Underpayments
• Timely filing concerns

Wisconsin Medical Billing also provides A/R management services, making it possible to connect coding and claim submission with post-submission follow-up.

For broader revenue-cycle education, the site’s article on denial management strategies provides another internal resource related to preventing and addressing claim denials.

Final Takeaway

Physical therapy evaluation CPT code is not a single code. Treatment CPT Codes (Physical therapy) The PT evaluation and CPT coding codes involving physical therapy evaluation and treatment is not a stand-alone CPT code.

Assess on true issues, not appointment time. Care codes should genuinely match the level of care. – Timed care codes must be done in actual minutes of care and units count should be the same.

A complete PT billing process should connect:

Clinical Documentation → Evaluation/CPT Selection → Treatment Coding → Modifier Review → Payer Verification → Claim Submission → Payment Posting → A/R Follow-Up

When these steps are aligned, practices can find out about coding problems before they make a claim and ease the process of protesting a denial.

Every clinic that wishes to outsource their physical therapy billing to a full-service out of house billing company that manages coding, claims, authorizations, payment posting and rejection follow-up can benefit from a tailored rehab process. Best Wisconsin Medical Billing – An introduction to our complete range of medical billing services and revenue cycle services.

Frequently Asked Questions

What are the CPT codes for physical therapy evaluation?

The primary PT evaluation codes are 97161, 97162, and 97163. They represent different evaluation complexity levels.

What is the CPT code for a physical therapy re-evaluation?

CPT 97164 is the physical therapy re-evaluation code. It is intended for an established patient when the applicable requirements for a re-evaluation are met.

What is the difference between 97161, 97162 and 97163?

They represent low-, moderate-, and high-complexity physical therapy evaluations. The documented clinical complexity and required evaluation components should support the selected code.

What CPT codes are commonly used for physical therapy treatment?

Common treatment codes include 97110, 97112, 97116, 97140, 97530, and 97535, depending on the actual service performed and the applicable payer requirements.

Is physical therapy evaluation a timed service?

PT evaluation codes have typical face-to-face times, but providers do not bill them in the same unit-based manner as many 15-minute treatment codes. Providers should follow the applicable CPT and payer rules.

Does Medicare require a modifier for PT evaluation codes?

CMS identifies the GP modifier for applicable PT evaluation and re-evaluation services furnished under a physical therapy plan of care.

Can a PT evaluation and treatment be billed on the same day?

Providers can report them on the same date when they perform the procedures as separately identifiable, medically necessary services, document them properly, and follow individual payer rules. The claim should reflect the time associated with both the evaluation and the treatment.