CPT Code 97165: Occupational therapy evaluation, low complexity

Key Takeaways

CPT Code 97165 describes a low complexity occupational therapy evaluation, introduced in January 2017 to replace the retired CPT code 97003.

Documentation must include an occupational profile, medical and therapy history, and performance analysis using low complexity medical decision-making.

97165 is commonly billed alongside modifier GP to indicate occupational therapy services under a Medicare Part B therapy plan of care.

Pabau’s claims management software helps occupational therapy practices track documentation requirements, submit claims, and reduce denial rates across payer types.

CPT Code 97165: Definition and clinical description

Official descriptor (AMA CPT Manual): “Occupational therapy evaluation, low complexity, requiring these components: An occupational profile and medical and therapy history, which includes a brief history including review of medical and/or therapy records and client/patient/caregiver interview; an assessment(s) that identifies 1-3 performance deficits (i.e., relating to physical, cognitive, or psychosocial skills) that result in activity limitations and/or participation restrictions; and clinical decision making of low complexity, which includes an analysis of the occupational profile, analysis of data from problem-focused assessment(s), and consideration of a limited number of treatment options. Patient presents with no comorbid conditions that affect occupational performance. Typically, 30 minutes are spent face-to-face with the patient and/or family.”

CPT Code 97165 falls under the Physical Medicine and Rehabilitation Evaluations subsection of the American Medical Association’s CPT code set. It is one of three complexity-tiered OT evaluation codes (97165, 97166, 97167) introduced on January 1, 2017, replacing the previously retired CPT code 97003. A fourth code, 97168 (OT re-evaluation), completes the set for follow-up assessments when significant changes occur during a plan of care.

Practices billing OT evaluations for occupational therapy software users will recognize this code as the entry point for straightforward cases: patients presenting with one to three performance deficits, no comorbid conditions affecting occupational performance, and straightforward clinical decision-making.

CPT Code 97165 vs. 97166 vs. 97167: Complexity comparison

Selecting the wrong complexity tier is one of the most common audit triggers in OT billing. The three evaluation codes share the same structural components but differ on the number of performance deficits identified, the presence of comorbidities, and the level of clinical decision-making required.

The time components listed above are typical, not mandatory. The code selection must be driven by the documented clinical components, not by time alone. Billing CPT Code 97165 because an evaluation happened to last 30 minutes, without meeting all three required documentation components, will not withstand a payer audit.

For practices also billing physical therapy evaluations, note that PT uses a parallel set (97161, 97162, 97163) with similar complexity tiers. The two sets are not interchangeable. Use the GP modifier to distinguish OT claims from PT claims on the same date of service.

Documentation requirements for CPT Code 97165

The three required components are non-negotiable. Missing even one is grounds for claim denial or post-payment audit recoupment.

Component 1: Occupational profile and medical/therapy history

This component requires a brief review of the patient’s medical and therapy records plus a client, patient, or caregiver interview. The therapist must document the patient’s occupational roles, meaningful activities, and how current deficits limit participation. A generic “patient reports difficulty with ADLs” entry does not satisfy this requirement. The documentation should name specific activities the patient values and connects deficits to those activities.

Component 2: Performance analysis identifying 1-3 deficits

The evaluation must identify between one and three performance deficits across physical, cognitive, or psychosocial skill domains. These deficits must result in activity limitations or participation restrictions. Common assessments used in low complexity evaluations include manual muscle testing, range of motion measurements, standardized ADL assessments, and basic cognitive screening tools.

If the evaluating therapist identifies four or more deficits during what was expected to be a low complexity encounter, the documentation and billing should reflect 97166 (moderate complexity) rather than 97165. The number of identified deficits drives the code selection.

Component 3: Low complexity clinical decision-making

Clinical decision-making for CPT Code 97165 involves analyzing the occupational profile, interpreting data from the problem-focused assessments, and considering a limited number of treatment options. The patient must present with no comorbid conditions that affect occupational performance. A patient with a single diagnosis (such as a post-surgical shoulder repair with no secondary conditions) typically qualifies for low complexity.

Good digital intake forms capture this information before the therapist enters the room, reducing documentation burden and helping ensure all three components are addressed systematically during every evaluation.

Who can bill CPT Code 97165?

Only a licensed occupational therapist (OT/OTR) may perform and bill CPT Code 97165. A Certified Occupational Therapy Assistant (COTA) cannot independently bill this code because initial evaluations require the professional judgment of a licensed OT.

Under Medicare Part B, COTAs may assist with portions of the evaluation but the supervising OT must be present, involved, and responsible for the documentation. Some commercial payers and state Medicaid programs have different supervision requirements, so verify with each payer’s provider manual before assuming Medicare rules apply universally.

This is a documented compliance risk area. Practices with mixed OT/COTA staffing need clear internal policies on who performs evaluations, how supervision is documented, and which provider is listed on the claim. The therapy clinic compliance documentation framework is a useful reference for building those internal policies.

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Modifiers used with CPT Code 97165

Modifier usage with CPT Code 97165 is payer-specific, but several modifiers appear frequently across payer types.

• GP (Services delivered under an outpatient physical therapy plan of care): Required by Medicare to identify occupational therapy services. Without GP, CMS cannot distinguish the OT claim from physical therapy claims. Always append GP when billing 97165 to Medicare.
• KX (Requirements specified in the medical policy have been met): Required when the Medicare therapy cap threshold has been exceeded. The KX modifier attests that the services are medically necessary and documented as such. Billing 97165 above the cap without KX triggers automatic denial.
• 59 (Distinct procedural service): Used when CPT Code 97165 is billed on the same date as another evaluation or therapeutic service that would otherwise appear duplicative. Document the clinical rationale clearly when using modifier 59.
• GN (Services delivered under an outpatient speech-language pathology plan of care): Incorrect for OT claims. Only GP applies to occupational therapy. Using GN with 97165 causes an immediate claim reject.

State Medicaid programs and commercial payers may require additional or different modifiers. Always verify modifier requirements in each payer’s fee schedule before submitting. The claims management software built into Pabau allows practices to set payer-specific billing rules, reducing the risk of modifier errors on submission.

Reimbursement rates and Medicare fee schedule for CPT Code 97165

Medicare reimbursement for CPT Code 97165 varies by geographic location, as rates are adjusted by the CMS Geographic Practice Cost Index (GPCI). National averages change annually with each Medicare Physician Fee Schedule update. For current verified figures, use the CMS Physician Fee Schedule search tool and select the current calendar year.

As a general reference point, CPT Code 97165 has historically reimbursed in the range of $85-$115 under Medicare fee-for-service rates (non-facility), though practitioners should verify current rates directly with CMS before relying on any published figure. Commercial payers typically reimburse at a percentage of the Medicare fee schedule or at negotiated contracted rates, which vary by plan and geography.

For practices tracking reimbursement trends across therapy clinic compliance requirements in multiple states, comparing fee schedule data regularly helps identify underpayments before they compound over a billing cycle.

Medicare coverage conditions for 97165

Medicare covers CPT Code 97165 under the Part B outpatient therapy benefit, subject to the following conditions:

• Services must be medically necessary, as defined by CMS Medicare Coverage Database articles A53304 and A56566
• Services must be provided under a physician-certified plan of care
• Documentation must support skilled service requirements (the evaluation must require the expertise of a licensed OT)
• Local Coverage Determination (LCD) L34560 applies in home health settings and adds additional coverage criteria

Maintenance therapy evaluations are covered under separate criteria. Do not bill CPT Code 97165 for maintenance-only visits without confirming medical necessity documentation meets skilled service thresholds.

Common billing errors with CPT Code 97165

The AAPC’s Codify CPT reference and auditor reports consistently identify the same failure patterns in OT evaluation billing. These are the most frequent errors practices encounter with 97165.

• Upcoding to 97166 without documented complexity: Billing the moderate code when documentation only supports low complexity is the single largest audit risk. Every claim for 97166 or 97167 must withstand scrutiny against the deficit count and comorbidity criteria.
• Missing the occupational profile component: Progress note templates carried over from pre-2017 formats often lack the occupational profile section entirely. If the template was built around the old 97003 code, it needs to be updated.
• Billing 97165 on the same date as 97530 without modifier 59: Therapeutic activity (97530) and evaluation codes can be billed together, but the distinct service must be documented and modifier 59 appended to avoid automatic bundling denials.
• Missing GP modifier on Medicare claims: Without modifier GP, the claim processes incorrectly or denies outright. This is a five-second fix at submission that many practices still miss.
• Billing by time rather than complexity: An evaluation that runs 35 minutes is still 97165 if it only identifies two performance deficits with no comorbidities. Conversely, an evaluation that runs 25 minutes but identifies four deficits should be billed as 97166.

Practices using therapy practice management software with built-in documentation templates can configure evaluation templates to prompt for all required 97165 components before the note is finalized. This prevents incomplete documentation from reaching the billing queue in the first place.

For broader context on how OT CPT codes fit into the larger therapy billing landscape, the OT Potential CPT guide covers practitioner perspectives on the full OT code set and common private-pay considerations.

Billing CPT Code 97165 in different practice settings

CPT Code 97165 is used across multiple practice settings, but the billing rules shift depending on where the service is delivered.

Outpatient clinic: The standard setting for 97165. Facility and non-facility rate differences apply depending on whether the OT is employed by a hospital outpatient department or an independent private practice. Independent practices typically bill at the higher non-facility rate.

Home health: LCD L34560 governs Medicare coverage in this setting and includes additional documentation requirements beyond the standard 97165 criteria. The patient must meet homebound status criteria, and skilled service documentation is more strictly reviewed. Practices with home health programs should consult the applicable MAC guidance before billing CPT Code 97165 in this context.

Telehealth: Post-Public Health Emergency, CPT Code 97165 telehealth eligibility depends on the payer. CMS has expanded some telehealth flexibilities permanently, but occupational therapy evaluation codes are subject to ongoing policy review. Verify current telehealth eligibility with CMS and each commercial payer before billing 97165 for a remote encounter. Many commercial payers still require in-person presence for initial evaluations.

For practices running a therapy practice across multiple settings, maintaining a payer-specific billing matrix that tracks setting-level coverage rules for CPT Code 97165 prevents setting-based claim errors from compounding.

Practices looking to tighten their broader billing workflows can also review how other therapy CPT codes interact with evaluation codes under different payer structures, particularly when concurrent services are delivered on the same date.

Accurate client record documentation is the foundation of defensible billing across all settings. Every evaluation note should be written as if an auditor will review it, because occasionally one will.

Conclusion

Most CPT Code 97165 denials are preventable. The code is well-defined, the documentation components are clear, and the modifier requirements are consistent. The gap between knowing the rules and applying them systematically is where practices lose revenue.

Pabau’s claims management software helps occupational therapy practices build documentation workflows that capture all required evaluation components, apply the correct modifiers automatically, and track claim status from submission to payment. To see how it works for OT billing specifically, book a demo.

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