CPT Code 97165: Billing Rules, GO Modifier, and 2026 Medicare Rate for OT Low Complexity Evaluations

Quick Answer: CPT code 97165 is an untimed occupational therapy evaluation code. It covers low-complexity initial evaluations for patients with 1 to 3 performance deficits and no comorbidities affecting occupational performance. Providers bill it once per episode, never in 15-minute units. The 2026 Medicare non-facility rate is about $98.08. Every Medicare Part B claim needs the GO modifier.

Some online summaries still tag 97165 as a timed code. That reading is wrong. The CMS Medicare Claims Processing Manual, Chapter 5, ties 15-minute billing to timed treatment codes, not evaluations. You report 97165 once for the evaluation, whatever the clock shows.

Billing coordinators, practice managers, and OT owners each own a piece of the 97165 claim. Code selection, the GO modifier, plan-of-care certification, the 2026 rate, modifiers, and documentation all carry a denial risk when any one of them is handled loosely.

Four things decide whether a 97165 claim pays clean: the GO modifier on every line, the complexity level matched to the note, plan-of-care certification inside 30 days, and KX tracking once the patient passes the annual threshold. The rest of this guide works through each one.

What Is CPT Code 97165?

The Official CPT 97165 Description

The CPT code 97165 description from the AMA covers a low-complexity occupational therapy evaluation built on five criteria.

1. A brief occupational profile and medical or therapy history, focused on the presenting problem rather than a full workup.
2. An assessment that identifies 1 to 3 performance deficits across physical, cognitive, or psychosocial skills and ties them to activity limitations or participation restrictions.
3. Clinical decision-making of low complexity, drawing on the occupational profile, problem-focused assessment data, and a limited set of treatment options.
4. A patient who presents with no comorbidities that affect occupational performance.
5. An evaluation the therapist completes without modifying tasks or adding physical or verbal assistance.

The code is untimed. The 30-minute figure attached to it describes typical face-to-face time, and the CMS Medicare Claims Processing Manual, Chapter 5, keeps time out of the selection decision. The AOTA occupational therapy evaluation descriptors carry the same criteria.

For the full evaluation set covering 97166, 97167, and 97168, the occupational therapy CPT codes 2026 guide lays out every complexity tier with verified 2026 CMS rates.

What Are the Four Components Every 97165 Note Must Document?

1. Occupational profile and history. Keep it brief and tied to the presenting problem, with the patient’s roles, routines, and concerns. Skip it, and the payer denies under medical necessity, since nothing establishes why the evaluation happened.
2. Assessment of 1 to 3 performance deficits. Name each deficit and link it to a specific activity limitation. Leave deficits vague, and the payer can’t confirm the low-complexity tier, so the line stalls for insufficient documentation.
3. Low-complexity clinical decision-making. Document the profile analysis, the data reviewed, and the limited treatment options weighed. Without it, the complexity choice is unsupported and sits first in line for a downcode on audit.
4. Plan of care. Match it to the deficits and the complexity level, with measurable goals, frequency, and duration. A plan that only says “improve ADL function” invites a denial long after the service date.

What Clinical Presentations Trigger CPT 97165?

Three Clinical Presentations That Support 97165

Three quick cases show where this ot evaluation cpt code fits.

Start with a post-operative hand. The patient arrives after an uncomplicated wrist fracture repair with one deficit, fine motor coordination, and no comorbidities affecting OT. Nothing about the assessment needs modification. 97165 is the right call.

A minor ADL case looks different and lands in the same place. Bathing and dressing trouble follows a minor knee replacement, two deficits show up in transfers and functional mobility, and the therapist finishes without physical assistance. Still 97165.

Pediatrics rounds out the set. A child referred for school performance concerns presents with two deficits, fine motor and cognitive processing, and completes standardized testing without any modification. 97165 again.

Four Presentations That Require 97166 or 97167 Instead

Four findings push the evaluation past low complexity:

1. Three or more performance deficits at once (97166 at minimum).
2. A need for physical assistance or task modification to finish the assessment (97166 at minimum).
3. Active comorbidities that affect occupational performance (97166 at minimum).
4. Five or more deficits with extensive modification (97167).

In 2026, 97165, 97166, and 97167 all pay about $98.08 under Medicare non-facility rates. Coding 97165 for a patient with three to five documented deficits saves nothing on the rate and creates a documentation mismatch that invites a downcode audit.

What Is the Difference Between CPT 97165, 97166, 97167, and 97168?

The 97165 cpt code is the entry point of a four-code family. The table sets the four side by side.

Code	Complexity	Deficits	Task Modification	Comorbidities	2026 Non-Facility Rate
97165	Low	1 to 3	Not needed	None affecting OT	~$98.08
97166	Moderate	3 to 5	Minimal to moderate	May be present	~$98.08
97167	High	5 or more	Significant	Present	~$98.08
97168	Re-evaluation	Varies	Varies	Varies	~$98.08

All four OT evaluation codes pay about $98.08 under 2026 Medicare non-facility rates. No rate reward exists for coding 97165 when the patient belongs at 97166. The only result is a documentation mismatch that raises downcode audit exposure.

What Is the Difference Between CPT 97165 and CPT 97166?

CPT 97165 covers low-complexity OT evaluations: 1 to 3 performance deficits, no comorbidities affecting occupational performance, and no task modification. CPT 97166 covers moderate complexity: 3 to 5 deficits, comorbidities that may be present, and minimal to moderate task modification or physical assistance. The documented deficit count and clinical decision-making level set the tier, not the minutes in the room.

When Does CPT 97168 Apply Instead of 97165?

Three conditions point to 97168 instead of a fresh initial code:

1. A documented change in the patient’s functional status from the initial evaluation.
2. A real revision to the plan of care, not routine progress.
3. At least 30 days since the initial evaluation, which several commercial plans, including Cigna, enforce by denying a re-evaluation billed sooner.

A 97168 note stands on its own. Referencing the initial 97165 note for context is fine; leaning on it to carry the re-evaluation’s decision-making is not.

Practices billing PT and OT evaluations on the same date document each one separately. The PT moderate-complexity eval billing guide breaks down the parallel 97162 criteria and the conditions for same-day OT and PT evaluation billing.

How to Bill CPT 97165: Unit Rules, Plan of Care, and 2026 CMS Changes

CPT 97165 Is Untimed and Skips the 8-Minute Rule

CPT code 97165 is an untimed evaluation code. You bill it once per evaluation episode, not in 15-minute increments. In practice, cpt 97165 bills one line for the visit.

The 8-Minute Rule, set in the CMS Medicare Claims Processing Manual, Chapter 5, governs timed treatment codes like 97110, 97112, and 97530. It doesn’t reach 97165, 97166, 97167, or 97168.

Medicare’s medically unlikely edit holds 97165 to one unit per date of service per provider. A second unit on the same date denies on the edit.

You can bill 97165 with a therapeutic treatment code on the same date when the note supports the treatment separately. NCCI edits decide which pairings hold, and Section 6 covers that.

Plan of Care Certification and the 30-Day Deadline

Medicare requires a physician or non-physician practitioner to certify the initial plan of care within 30 calendar days of the 97165 evaluation. Miss it, and every OT claim under that plan is exposed, the evaluation and each treatment line after it.

Recertification follows every 90 calendar days from the initial certification date. If functional status shifts hard between cycles, get a new certification then, without waiting for the 90-day mark.

The clock starts on the evaluation date. A physician signature on day 32 leaves every claim from day 1 through day 32 open to retrospective denial. Track the window at the patient level and set an alert at day 21.

Telehealth Billing for CPT 97165 in 2026

The Consolidated Appropriations Act, 2026, signed February 3, 2026, extended Medicare telehealth eligibility for occupational therapists through December 31, 2027. 97165 bills via telehealth under Medicare Part B through that date.

The GO modifier still rides on every telehealth 97165 claim. Use place of service 02 when the patient is not at home and 10 when the patient is at home. These 2026 Medicare occupational therapy coverage requirements leave documentation untouched, so the same four components apply.

Starting January 1, 2028, occupational therapists lose Medicare telehealth billing unless Congress acts again.

The 2026 Efficiency Adjustment and What It Costs Your OT Practice

CMS finalized a permanent 2.5% efficiency adjustment to work relative value units for non-time-based services, effective January 1, 2026. CPT code 97165 is untimed, so it takes the cut.

97165 cpt code reimbursement drops with it. The non-facility rate moves from roughly $100.60 in 2025 to about $98.08 in 2026, near $2.52 per evaluation. At 80 evaluations a month, that runs about $201.60 monthly and roughly $2,419.20 a year from this one code.

The reduction is permanent, and there’s no appeal. The offset is clean billing on the timed treatment codes in the same session.

Representative 2026 commercial averages from price-transparency data land near $93.89 (BCBS), $91.90 (UnitedHealthcare), $93.82 (Aetna), and $110.36 (Cigna). Contracted rates swing by plan and market, so treat these as directional. Even so, Medicare’s $98.08 holds up against several commercial averages for this code.

Holding POC deadlines, KX accumulation, and GO modifier discipline together across a live OT caseload is real operational work that grows with volume. The OT medical billing service team folds it into a standard pre-submission workflow instead of chasing it after the denial.

CPT 97165 Modifier Rules: GO, KX, CO, GY, and 59

What Is the GO Modifier for CPT 97165, and Why Does Missing It Cause Rejection?

The correct modifier for CPT 97165 under Medicare Part B is GO, not GP. Every CPT code 97165 claim billed to Medicare carries it.

GO marks a service delivered under an outpatient occupational therapy plan of care. Medicare expects the go modifier for occupational therapy on every OT line, 97165 included. A 97165 claim sent without GO doesn’t reach adjudication; it bounces at the clearinghouse first.

Modifier	Discipline	Meaning
GO	Occupational therapy	Services under an outpatient OT plan of care
GP	Physical therapy	Services under an outpatient PT plan of care
GN	Speech-language pathology	Services under an outpatient SLP plan of care

Appending GP to a 97165 claim isn’t a small slip. It tells Medicare the service was physical therapy, and the claim rejects because the rendering NPI is enrolled as an occupational therapist. The system catches it at the transaction level, before adjudication.

A GO-missing rejection comes back as an X12 277CA rejection, not a CARC code on an 835 remittance. The fix is correction and resubmission, not an appeal. Route it to the appeals queue, and staff lose days on a claim that needed a two-second edit.

GO rides every OT line on the date, not only the evaluation. When treatment codes follow in the same session, each one carries GO. The CPT 97140 GO modifier rules guide walks the rejection pattern when GO drops off a treatment line after the evaluation line had it right.

What Is the Correct Modifier for CPT 97165: GO, GP, or GN?

The correct modifier for the 97165 cpt code is GO. GO designates occupational therapy services under an outpatient OT plan of care under Medicare Part B. GP is the physical therapy modifier and GN is the speech-language pathology modifier, and neither belongs on 97165.

KX Modifier for CPT 97165: The 2026 Threshold and Auto-Denial Rule

The 2026 KX modifier threshold for occupational therapy under Medicare Part B is $2,480. OT carries its own threshold, separate from the combined PT and SLP threshold, which also sits at $2,480.

Once a Medicare patient’s OT charges reach $2,480 in a calendar year, KX goes on every later OT line for that patient. KX attests that care above the threshold stays medically necessary and is backed by the chart.

Claims above $2,480 without KX deny on the edit, no matter how strong the note. The clearinghouse passes them through, since it can’t track a patient’s annual accumulation, so the payer’s system catches them. By the time the denial lands, 30 days of collection timeline are gone.

Past $3,000 in OT charges, CMS’s targeted medical review can pull the chart. Documentation above that point has to show skilled need, measurable progress, and why skilled OT, rather than unskilled help, reaches the goals. That $3,000 threshold holds through 2027.

CO Modifier: Billing CPT 97165 When an OTA Is Involved

CO marks outpatient occupational therapy delivered in whole or in part by an occupational therapy assistant. Medicare pays those services at 85%, so a 97165 billed with CO would land near $83.37 instead of $98.08 in 2026.

The catch sits in who performs the evaluation. A licensed occupational therapist, not an assistant, performs the initial evaluation under Medicare. CO on a 97165 line signals OTA involvement in a service Medicare expects from the therapist, which puts the claim at risk. CO belongs on treatment codes, not on the evaluation.

Modifier 59 and GY for CPT 97165

Modifier 59 marks 97165 as separate and distinct when it’s billed alongside a service that would otherwise bundle, and only when the record backs that up. The CMS NCCI Policy Manual is blunt: 59 never exists to dodge an edit the clinical picture doesn’t justify. It’s the most-audited modifier in outpatient therapy.

GY marks 97165 as a statutorily excluded service, say a wellness screen with no skilled need. It shifts liability to the patient and clears the practice to bill directly. GY doesn’t make the service covered.

2026 Medicare Reimbursement Rate for CPT Code 97165

What Is the 2026 Medicare Non-Facility Rate for CPT 97165?

The 2026 Medicare non-facility rate for 97165 is approximately $98.08, set in the CMS CY 2026 Physician Fee Schedule Final Rule (CMS-1832-F) and adjusted by GPCI for your locality.

2026 brings two conversion factors for the first time. Qualifying APM participants get $33.57; everyone else gets $33.40. Most outpatient OT practices sit on the non-qualifying side, and the $98.08 figure reflects that $33.40 factor applied to the 97165 work RVU and geographic inputs.

National numbers are a starting point. Your allowed amount tracks your Medicare Administrative Contractor locality, so confirm it on the CMS Physician Fee Schedule lookup tool before you quote a rate.

Commercial Payer Rates for CPT 97165 in 2026

Payer	Representative 2026 Average for 97165
BCBS	$93.89
UnitedHealthcare	$91.90
Aetna	$93.82
Cigna	$110.36

Representative national averages from 2026 price-transparency data. Provider-level rates vary by contract, NPI, and market.

Medicare’s $98.08 holds up against several of these averages, which is unusual for an evaluation code. That matters when you sit down to renegotiate a commercial contract.

Why All Three OT Evaluation Codes Pay the Same Rate in 2026

97165, 97166, and 97167 all pay about $98.08 under 2026 Medicare non-facility rates. Picking 97165 for a patient who documents three to five deficits doesn’t trim your rate; it builds audit liability with no upside. Code to the documented complexity, not to the level that feels safest.

What Documentation Is Required for a CPT 97165 Evaluation?

The Four Required Documentation Elements for CPT 97165

For cpt 97165, the AMA and AOTA framework expect four elements, and each one carries a billing consequence when it’s thin.

1. Occupational profile and history. Cover the patient’s roles, routines, daily occupations, and concerns, tied to the presenting problem. Leave it out, and the payer denies under medical necessity, usually CARC 50, since nothing grounds the evaluation.
2. Assessment of 1 to 3 performance deficits. Name each deficit and connect it to an activity limitation; “difficulty with ADLs” names neither. Vague deficits cost the low-complexity tier and stall the line for insufficient documentation.
3. Low-complexity clinical decision-making. Show the profile analysis, the data reviewed, and the limited treatment options weighed. Skip the rationale, and the complexity choice sits first for a downcode on audit.
4. Plan of care. Tie it to the deficits and complexity, with measurable, functional goals plus frequency, duration, and skilled-need rationale. A plan that only promises “improved ADL function” is a denial waiting on the shelf.

The cpt code 97165 description from AOTA lines up with these four elements and the AMA’s 2026 complexity framework.

What Cloned Notes Do to CPT 97165 Claims

A cloned note repeats the same 97165 language for every patient, swapping only the name and date. CMS targeted probe and educate reviewers read that as a pattern. Once they spot identical deficits, goals, and reasoning across patients, recoupment can reach the whole date range, not one claim.

ICD-10 Codes Most Commonly Used With CPT 97165

These occupational therapy ICD-10 codes show up most often on 97165 claims.

ICD-10 Code	Description	Common OT Context
S52.501A	Unspecified fracture of lower end of right radius, initial encounter	Wrist fracture OT evaluation
M79.641	Pain in right hand	Post-injury hand therapy evaluation
G81.10	Spastic hemiplegia affecting unspecified side	Post-stroke ADL evaluation
F84.0	Autistic disorder	Pediatric sensory and ADL evaluation
Z96.641	Presence of right artificial hip joint	Post-op hip ADL evaluation
M54.50	Low back pain, unspecified	Work-injury functional evaluation

Code to the highest specificity the record supports. Pairing 97165 with a vague code like Z99.89 instead of a specific diagnosis invites a medical-necessity mismatch and a CARC 50 denial. The diagnosis has to support the functional deficit documented in the evaluation.

What Happens When the 97165 Note Doesn’t Match the Complexity Tier

Bill 97165 while the note documents four deficits, and the record describes moderate complexity. Payers running complexity audits catch the gap. The common outcome is a downcode with a demand for documentation that justifies the level; the next is a denial for documentation that doesn’t support the billed complexity, often CARC 50.

Medicare’s Recovery Audit Contractor program can pull records and claw back payment up to three years out for coding errors. A mismatch that feels minor at billing time turns into a multi-year liability once volume climbs.

CPT 97165 Billing Errors, Denial Triggers, and CARC Codes

These are the seven most common billing errors on CPT code 97165 claims, with the code the payer sends back and the fix.

Error	CARC	Payer Action	Root Cause	Fix
GO modifier missing on a Medicare claim	None (clearinghouse rejection)	Rejected before adjudication	Modifier template not set for OT	Add GO to every OT template and check before submission
KX missing above the $2,480 threshold	CARC 50	Denied	No per-patient threshold tracking	Alert at $2,000 and $2,480 per OT patient
97530 billed same day as 97165 under an active edit	CARC 97	97530 line denied as bundled	NCCI edit not loaded	Move 97530 off the eval date or support modifier 59
Multiple units of an untimed 97165	CARC 151	Units denied	8-Minute Rule applied to an untimed code	Bill one unit per evaluation episode
Note supports 97166 but 97165 billed	CARC 50 or downcode	Denied or downcoded	Level chosen without reading the note	Code from the documented deficit count
OTA involved in the initial eval, CO applied	CARC 50	Denied	CO applied to all OT lines	Keep CO off 97165; bill the eval under the OT
Plan of care not certified within 30 days	CARC 50	Claims under the unsigned plan denied	No certification tracking	Alert at day 21 from the evaluation date

Every code here is exact. The GO-missing row says clearinghouse rejection, not a CARC, because those claims never reach adjudication. That single distinction routes the fix the right way.

Can You Bill CPT 97165 and CPT 97530 on the Same Date of Service?

A 97165 cpt code claim and a same-day 97530 line raise the edit question first. When the NCCI procedure-to-procedure edit pairs 97530 with the OT evaluation codes, the evaluation pays and 97530 denies as bundled, CARC 97, unless modifier 59 is supported.

NCCI has changed this pairing more than once since 2020, so the safe move is to check the current quarter’s edit file before billing the two together. The CMS NCCI Policy Manual sets the modifier-59 standard: a separately identifiable activity, distinct in time, purpose, and documentation from the evaluation.

Payer-Specific Denial Patterns for CPT 97165

Payers layer their own rules on top of Medicare, and three show up often:

1. Cigna. Often denies a re-evaluation (97168) billed within 30 days of the initial 97165, 97166, or 97167, with CARC 50. The appeal has to show a real change in functional status inside that window.
2. Anthem. Through its medical benefits management program, requires prior authorization for initial OT evaluations on many plans. A claim without a valid authorization number typically denies with no retroactive path, so the authorization comes before the visit.
3. UnitedHealthcare. Leans on documented, measurable progress and often quantifies baseline function with a validated tool. Requirements vary by plan, so verify before the visit.

When 97165 denials climb past a few percent, the cause is usually a workflow gap, not stray errors. The denial management services team runs root-cause analysis by category, finds the upstream break, and closes it across active claims.

GO Modifier Rejection vs CARC 50 Denial: Different Fix

A missing GO modifier throws a clearinghouse rejection. The claim never reaches the payer, and correction and resubmission clear it in hours.

A CARC 50 medical-necessity denial is different. It lands after adjudication and needs a written appeal with documentation, which takes days. Routing a go modifier for occupational therapy rejection to the appeals queue burns appeal time on a two-minute fix. The clearinghouse rejections billing guide maps the workflow for each.

Frequently Asked Questions About CPT 97165 Billing

What Is CPT Code 97165?

It’s the occupational therapy evaluation code for low-complexity initial visits. It fits a patient with 1 to 3 performance deficits across physical, cognitive, or psychosocial skills, no comorbidities affecting occupational performance, and an assessment finished without task modification or assistance. You bill it once per episode, it’s untimed, and it carries the GO modifier on every Medicare Part B claim.

What Is the Difference Between CPT 97165 and CPT 97166?

The cpt 97165 criteria sit at the low end: 1 to 3 deficits, no comorbidities, and no task modification. CPT 97166 covers moderate complexity: 3 to 5 deficits, comorbidities that may be present, and minimal to moderate modification. Both pay about $98.08 under Medicare in 2026, so the deficit count and decision-making level decide the code, not the rate.

What Is the Correct Modifier for CPT 97165: GO, GP, or GN?

The correct modifier is GO. GO marks occupational therapy under an outpatient OT plan of care, and Medicare requires it on every 97165 claim. GP is the physical therapy modifier; GN is the speech-language pathology modifier. Append GP and the claim rejects at the clearinghouse, since it declares physical therapy while the rendering NPI is an occupational therapist.

Can CPT 97165 and CPT 97530 Be Billed on the Same Date?

It depends on the active NCCI edit. When the edit pairs them, billing both pays only the evaluation and denies 97530 as bundled, CARC 97. Modifier 59 applies only when documentation supports a separate, distinct therapeutic activity, and the pairing has changed since 2020, so check the current edit file before billing them together.

Does Anthem Require Prior Authorization for CPT 97165?

Many Anthem plans require prior authorization for initial OT evaluations through the plan’s medical benefits management program, and a missing authorization usually denies with no retroactive path. UnitedHealthcare more often ties authorization to a visit threshold. BCBS requirements shift by affiliate and plan. The eligibility and prior authorization guide covers OT prior-auth rules by payer.

What Are the 7 Areas of Occupational Therapy?

The AOTA Occupational Therapy Practice Framework (OTPF-4) defines nine occupations, not seven: activities of daily living, instrumental activities of daily living, health management, rest and sleep, education, work, play, leisure, and social participation.

Older versions grouped them differently, which is where the “seven areas” phrasing comes from. CPT code 97165 most often applies when ADL and IADL deficits drive the evaluation, things like bathing, dressing, transfers, and meal preparation.

Keeping GO discipline, KX accumulation, POC timing, and complexity documentation aligned across a busy OT caseload takes a pre-submission audit layer, not a post-denial scramble. The medical billing specialists for OT practices handle it at the claim level, before submission.

97165 is one piece of the OT revenue cycle. ClaimMax RCM runs complete occupational therapy revenue cycle management for OT practices nationwide, from credentialing and payer enrollment through denial management, AR recovery, and payment posting. No long-term contracts, no setup fees.

For the full 2026 OT code set, from 97165 through 97530 and the RTM codes, the complete OT CPT code billing guide covers every category with 2026 CMS rates.

Sources

1. CMS, CY 2026 Medicare Physician Fee Schedule Final Rule (CMS-1832-F): cms.gov
2. CMS, Medicare Claims Processing Manual, Chapter 5: cms.gov
3. CMS, Therapy Services and the CY 2026 KX Modifier Threshold (MM14315): cms.gov
4. CMS, Physician Fee Schedule Search Tool: cms.gov
5. AOTA, Occupational Therapy Evaluation CPT Code Descriptors and Practice Framework: aota.org
6. CMS, National Correct Coding Initiative Policy Manual, 2026: cms.gov
7. CMS, Medicare Telehealth Coverage: cms.gov

Medicare rates are national non-facility averages. Confirm your MAC locality rate on the CMS Physician Fee Schedule Search Tool. This guide is educational and is not billing or legal advice.