Modifier 96 and Modifier 97: Documentation Rules That Reduce Audit Risk

Accurate use of CPT modifiers plays a direct role in coding clarity, reimbursement, and audit readiness. Among the modifiers tied to therapy services, modifier 96 and modifier 97 are often misunderstood or inconsistently applied.

Both relate to habilitative and rehabilitative therapy, yet their clinical intent, documentation requirements, and payer interpretation differ in meaningful ways. For organizations delivering therapy across outpatient, pediatric, home health, and interdisciplinary settings, distinguishing between habilitation and rehabilitation directly affects claims submission, medical necessity documentation, and compliance alignment.

Understanding the intent of modifier 96 and modifier 97

Modifier 96: habilitative services

Modifier 96 is appended to CPT codes to indicate that the therapy service provided is habilitative in nature.

Habilitation focuses on helping an individual develop, learn, or improve skills and functioning that they have not yet acquired. This typically applies to congenital conditions, developmental delays, or early-onset diagnoses. The goal is skill acquisition rather than restoration of prior function.

Habilitative therapy commonly serves pediatric patients with developmental delay, individuals with autism spectrum disorder, patients with cerebral palsy, and those with genetic or neuromuscular conditions present from birth.

For example, speech therapy that supports expressive language development in a child who has not yet acquired communication skills would be considered habilitative care.

Although habilitative services are most commonly associated with pediatric care, they may also apply to adults with congenital or lifelong conditions who have never developed certain functional abilities.

Modifier 97: rehabilitative services

Modifier 97 identifies therapy services as rehabilitative in nature.

Rehabilitation focuses on restoring or improving skills that were previously present but lost or impaired due to illness, injury, surgery, or medical events.

Rehabilitative therapy commonly applies in post-operative orthopedic care, stroke recovery, traumatic brain injury rehabilitation, and post-acute mobility retraining.

Modifier 96 vs modifier 97: what’s the difference?

Although both modifiers apply to therapy CPT codes, the distinction centers on prior level of function and treatment intent.

While the CPT procedure code may remain unchanged, modifier selection determines how the service is categorized and reviewed by payers.

When and how to apply modifier 96

Appropriate clinical scenarios

Modifier 96 should be appended when therapy is directed at building new functional capacity rather than restoring prior function.

Examples include occupational therapy teaching fine motor grasp patterns in a child with Down syndrome, physical therapy supporting gait development in a toddler with spina bifida, or speech therapy addressing receptive language acquisition delays.

In each case, the targeted skill has not previously been acquired.

Documentation expectations

To support modifier 96 use, documentation should clearly establish the presence of a developmental or congenital diagnosis, confirm that the targeted skill has not previously been acquired, and describe the patient’s functional baseline in relation to age norms. Treatment goals should emphasize skill acquisition and developmental progression rather than restoration of prior abilities.

Example documentation framing: “Patient demonstrates delayed bilateral coordination and has not achieved age-appropriate utensil use. Treatment focuses on skill acquisition to support self-feeding independence.”

Plan of care considerations

Plans of care reflecting habilitative intent often incorporate developmental milestone benchmarks, caregiver education and training, environmental modification strategies, and coordination with school systems or early intervention programs.

These elements reinforce that the focus is developmental progression rather than recovery of lost function.

When and how to apply modifier 97

Appropriate clinical scenarios

Modifier 97 applies when therapy is directed at restoring function that was previously present but lost due to injury, illness, surgery, or medical events.

Examples include physical therapy following total knee arthroplasty, occupational therapy after hand fracture, or speech therapy addressing aphasia after stroke.

In each scenario, the patient previously demonstrated the targeted skill prior to the event or condition.

Documentation expectations

To support modifier 97 use, records should clearly establish the patient’s prior level of function, identify the date and cause of functional decline, and document measurable deficits compared to baseline. Treatment goals should be framed around restoration of previously demonstrated abilities and functional recovery tied to that prior baseline.

Example documentation framing: “Patient previously independent with stair negotiation. Following CVA, now requires moderate assistance. Therapy targets restoration of pre-morbid mobility.”

Outcome tracking

Rehabilitative services often incorporate measurable progress toward prior function through functional outcome measures, strength and range-of-motion metrics, mobility, and activities of daily living (ADL) performance scales, and discharge comparison to baseline.

Do Medicare plans require modifier 96 or 97?

Many commercial payers require modifier 96 and modifier 97 to distinguish habilitative from rehabilitative services for benefit tracking and claims processing.

Medicare Part B does not universally require these modifiers for outpatient therapy claims. Providers billing Medicare should verify current CMS guidance and confirm requirements with their Medicare Administrative Contractor (MAC) or payer-specific policies before applying these modifiers.

Always confirm modifier requirements at the payer level.

Payer policy and benefit design implications

Under the Affordable Care Act (ACA), rehabilitative and habilitative services and devices are included as one of the essential health benefit (EHB) categories for non-grandfathered individual and small group plans.¹ However, states define their EHB benchmark plans, and benefit structures may vary.

Many commercial plans differentiate habilitative and rehabilitative therapy benefits through visit limits, authorization requirements, and cost-sharing structures. Some plans assign separate visit caps to each category.

Incorrect modifier use may lead to premature benefit exhaustion, denials tied to benefit classification, or reprocessing delays.

Coding workflow integration

Modifier accuracy requires alignment across intake, clinical documentation, and billing processes. Inconsistent application of modifier 96 and modifier 97 often stems from breakdowns between these functions.

Establishing clear workflows across teams reduces denial risk, prevents benefit misclassification, and strengthens audit defensibility.

Front-end intake alignment

Accurate modifier selection frequently begins at intake. The information gathered during initial registration and evaluation informs whether services are habilitative or rehabilitative.

Intake workflows should capture:

• Developmental history

• Onset timing of impairment

• Prior functional independence

• Surgical or injury history

• School or early intervention involvement (when applicable)

Without this context, clinicians may lack the documentation foundation needed to support correct modifier classification.

Clinician documentation training

Clinicians establish modifier intent through evaluation findings and goal-writing.

Organizations should provide education on:

• The distinction between skill acquisition and skill restoration

• How to document absence of prior skill development

• How to clearly establish prior level of function

• How payer terminology may differ across plans

Standardized EMR templates and documentation prompts can reinforce consistent framing aligned with modifier intent.

Coding and billing review

Revenue cycle teams serve as the final checkpoint before claim submission.

Billing workflows should verify:

• Modifier presence when required by payer

• Alignment between diagnosis and modifier classification

• Authorization category (habilitative vs. rehabilitative)

• Visit tracking within the correct benefit structure

Cross-functional communication between clinical and billing teams reduces misclassification risk.

How modifier selection plays out in practice

Scenario 1: pediatric occupational therapy (habilitative)

A 5-year-old child with autism spectrum disorder presents for evaluation due to delayed fine motor development. The child has never independently manipulated fasteners or demonstrated age-appropriate bilateral coordination.

The therapy plan focuses on developing foundational motor skills and supporting self-feeding independence.

Coding: CPT 97530 with modifier 96

Rationale: The targeted skills have not previously been acquired. The service is habilitative.

Scenario 2: post-surgical physical therapy (rehabilitative)

A 62-year-old patient undergoes rotator cuff repair following a fall. Prior to injury, the patient was independent with overhead reaching and daily activities.

The therapy plan targets restoration of shoulder mobility and return to prior functional tasks.

Coding: CPT 97110 with modifier 97

Rationale: The therapy aims to restore previously established function. The service is rehabilitative.

Scenario 3: same CPT code, different modifier

Two patients receive speech therapy using the same CPT code.

Patient A is a child with congenital apraxia of speech who has never developed consistent articulation patterns. Patient B is an adult who experienced a traumatic brain injury and lost previously established speech clarity.

The procedure code may be identical, but modifier selection is determined by functional history and treatment intent.

Coding: CPT 92507, with modifier 96 for patient A and modifier 97 for patient B

Rationale: Although the procedure code is identical, modifier selection reflects whether therapy is directed at acquiring a skill that was never developed (habilitation) or restoring a skill that was previously present and lost (rehabilitation). Functional history and treatment intent determine correct classification.

Compliance and audit considerations

Modifier selection doesn’t just signal clinical intent—it determines how payers interpret the entire episode of care. When habilitative and rehabilitative services are misclassified, the consequences often surface during audit or denial review.

Audit exposure most commonly arises in a few predictable situations:

• Modifiers are omitted when required

• Habilitative services are billed as rehabilitation

• Documentation lacks developmental or functional context

• Goals do not align with the modifier classification

To strengthen audit defensibility, documentation should clearly demonstrate:

• Whether the diagnosis reflects a congenital/developmental or acquired condition

• Whether the evaluation establishes a developmental baseline or prior level of function

• That goals reflect acquisition (modifier 96) or restoration (modifier 97)

• That progress notes reinforce the original treatment intent

Technology and reporting implications

Modifier accuracy shouldn’t depend on memory or habit. It should be reinforced by the systems clinicians and billing teams use every day.

When EHRs clearly distinguish habilitative from rehabilitative visits and align authorizations with benefit categories, classification becomes consistent. When reporting tools allow organizations to see how visits are being categorized in real time, denial risk becomes easier to manage.

Without that visibility, errors often surface only after payer review. When correction is more time-consuming and financially disruptive.

Technology, when configured well, acts as a safeguard rather than a passive recordkeeper.

Operational impact across care settings

Modifier 96 and modifier 97 apply across pediatric outpatient clinics, school-based therapy programs, home health agencies, and hospital outpatient departments. Organizations that treat both congenital and acquired conditions may apply both modifiers within the same billing cycle.

In multi-site or interdisciplinary practices, inconsistency can emerge when clinicians interpret habilitation and rehabilitation differently. Standardized documentation guidance and shared terminology reduce variability across disciplines and locations.

As practices expand service lines or geographic reach, workflow clarity becomes increasingly important to maintain compliance alignment and revenue stability.

Why modifier 96 and modifier 97 accuracy matters

The distinction between habilitative and rehabilitative therapy is not theoretical. It directly influences how services are reviewed, how benefits are applied, and how claims are processed.

Modifier 96 and modifier 97 translate clinical intent into billing language. When documentation clearly supports whether therapy is building a skill for the first time or restoring one that was lost, claims are easier to defend and benefit usage remains appropriate.

Organizations that align intake, evaluation, and billing practices create consistency across the episode of care. That consistency reduces denial risk, strengthens audit readiness, and supports sustainable therapy reimbursement.

Accurate modifier selection ultimately reflects more than coding precision. It reflects clarity in how therapy services are defined, delivered, and supported.

Disclaimer: The information provided in this article is for informational and educational purposes only and does not constitute legal, billing, or reimbursement advice. Coding requirements, payer policies, and regulatory guidance may vary by jurisdiction, payer contract, and care setting. Organizations and clinicians are responsible for verifying modifier usage, documentation standards, and billing practices with current CPT guidance, the Centers for Medicare & Medicaid Services (CMS), and applicable commercial payer policies. Always consult qualified coding, compliance, or legal professionals for organization-specific interpretation and implementation.

References

1. Centers for Medicare & Medicaid Services. (n.d.). Information on essential health benefits (EHB) benchmark plans. https://www.cms.gov/cciio/resources/data-resources/ehb