What does denial code CO-119 mean?

CO-119 means the patient has reached the maximum benefit allowed for this type of service during the current benefit period. Common examples: a plan that covers 20 physical therapy visits per year, or a plan with a $2,000 annual chiropractic dollar maximum, or a Medicare plan that has a visit limit for outpatient mental health. Once the maximum is hit, the payer stops paying — the question becomes whether the patient can be billed and whether the payer's count is accurate.

Can I bill the patient for a CO-119 denial?

It depends on whether the patient was notified in advance. If you had the patient sign a financial consent form or ABN-equivalent notice acknowledging that their benefit was exhausted and they agreed to continue as self-pay, you can bill them. If you did not notify them before providing the service, most payer contracts prohibit billing the patient — the balance is a write-off. This is why real-time benefit tracking and proactive patient notification at the 80% mark is critical.

Does MHPAEA parity law eliminate visit caps on mental health benefits?

MHPAEA prohibits group health plans from imposing treatment limitations (visit caps, dollar limits, prior auth requirements) on mental health/SUD benefits that are more restrictive than comparable medical/surgical benefits. If a plan has unlimited outpatient medical visits but caps outpatient behavioral health at 30 visits per year, that cap likely violates MHPAEA. File a parity complaint with the Department of Labor (for ERISA employer plans) or your state insurance commissioner (for fully-insured plans). Note: MHPAEA applies to group plans with 51+ employees and most individual market ACA plans, but not to grandfathered plans or small self-funded employer plans under 50 lives.

What is the difference between CO-119 and CO-151?

CO-119 means the patient has reached the total benefit maximum for the period — the overall cap (e.g., 30 visits per year) is exhausted. CO-151 means the units or frequency claimed on a specific claim exceed what the payer allows — a per-claim frequency edit (Medically Unlikely Edit / MUE) rather than an annual cap. CO-119 is a period issue; CO-151 is a per-claim frequency issue.

How do I verify whether the payer's visit count is correct?

Call the payer's provider services line and ask for a list of all dates of service they have counted toward this benefit for this patient in the current benefit period. Compare that list to your submission records and to remittances showing payment. Look for: dates you didn't submit, duplicate dates, claims from a different provider (the payer may be counting visits across all providers toward the same limit), or claims that were subsequently denied or reversed that are still being counted. Payer tracking errors are common, especially for therapy benefits.

How do I prevent CO-119 denials?

Prevention requires real-time benefit tracking in your PM system. At eligibility verification, capture the benefit maximum (visit count, dollar limit, unit limit) and the current used count. Update the used count after each billed visit. Set an alert at 80% of the benefit maximum to trigger a patient notification and financial consent workflow. For therapy practices, this should be a standard intake and ongoing tracking process — CO-119 should never surprise you or the patient.

What happens when the benefit period resets?

Most benefit periods are calendar year (January 1) or plan year (varies by employer). Once the benefit period resets, the patient's visit count returns to zero and they are eligible for the full benefit again. If a patient hit their cap late in the year, it is worth delaying elective continuation of care until the new benefit period begins so the payer will cover the visits. Document in the patient record when their benefit period resets so you can plan ahead.

CO-119 Denial Code: Benefit Maximum Reached — Visit Caps, Dollar Limits & Fix Guide 2026

CO-119 in plain English

CO-119 means the patient has used up their allowed benefit for this type of service this year. Before accepting the denial: (1) verify the payer's visit count against your records — payer tracking errors are common; (2) check whether MHPAEA parity law prohibits this cap for behavioral health; (3) determine whether the patient was pre-notified, which determines whether you can bill them. Real-time benefit tracking is the only reliable prevention.

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Do not bill the patient without verifying pre-notification first

CO-119 is a CO (Contractual Obligation) denial. Billing the patient requires that you notified them in advance that their benefit was exhausted and obtained their agreement to continue as self-pay. Without documented pre-notification, most payer contracts prohibit billing the patient for the CO-119 balance — it is a provider write-off. Check your documentation before sending a patient statement.

Types of Benefit Maximums

How CO-119 applies across different benefit categories

CO-119 can appear for any benefit with a maximum limit. The table below covers the most common benefit types and their typical cap structures — always verify the specific limit in the patient's EOB or by calling the payer.

Benefit Type	Cap Type	Typical Limit Range	Parity Law Applies?	Key Verification Step
Physical Therapy (PT)	Visit	20–60 visits/year (commercial); Medicare uses Therapy Cap with exceptions	No — PT is not a mental health benefit	Request payer's visit count by DOS; compare to your claims. Verify Medicare KX modifier was appended when above threshold.
Occupational Therapy (OT)	Visit	20–60 visits/year; often shared pool with PT	No	Verify whether PT and OT visits are counted in a combined pool or separately. Many plans use a shared visit bank.
Speech-Language Therapy (ST)	Visit	20–40 visits/year; sometimes combined with PT/OT pool	No	Same as PT/OT — verify whether pool is shared or separate. Speech therapy for swallowing disorders may be billed under a different benefit category.
Chiropractic / Spinal Manipulation	Visit or Dollar	12–52 visits/year or $500–$1,500 dollar limit	No	Verify whether the cap is visit-based or dollar-based. Some plans have both. Chiropractic is excluded from Medicare unless medically necessary active care (maintenance excluded).
Outpatient Mental Health / BH	Visit or Dollar	Varies — but MHPAEA may prohibit limits more restrictive than medical/surgical	Yes — MHPAEA applies	Compare to outpatient medical/surgical visit limits. If medical/surgical has unlimited visits but BH is capped, file a parity complaint. See MHPAEA section below.
Substance Use Disorder (SUD)	Visit or Day	Varies — MHPAEA applies; ACA requires SUD coverage	Yes — MHPAEA applies	SUD benefits are often more restricted in practice than on paper. MHPAEA compliance is frequently litigated. Prior auth requirements that exceed medical/surgical requirements may also violate parity.
DME / Home Health Equipment	Dollar or Unit	Annual dollar maximum varies widely; some plans have per-item limits	No	Verify whether the cap applies per-item or to the total DME benefit pool. Some plans cap specific items (e.g., $2,000 annual oxygen equipment maximum).
Vision Care	Dollar or Unit	Typically 1 exam + allowance for frames/lenses per year; some plans every 2 years	No (vision is a separate benefit)	Verify whether vision is managed by the main plan or a vision carve-out (VSP, EyeMed, Davis Vision). CO-109 (wrong payer) and CO-119 can co-occur for vision claims.
Skilled Nursing Facility (SNF)	Day	Medicare: 100 days per benefit period (days 21–100 require copay); commercial varies	No	For Medicare SNF, verify the benefit period start date and days used. A new benefit period begins after a 60-day gap from a prior hospital/SNF stay.
Home Health Visits	Visit	Varies by plan; Medicare has no hard visit cap but requires homebound status	No	Medicare home health denials are usually medical necessity (homebound status, skilled care requirement) rather than CO-119. Commercial plans may have explicit visit limits.

MHPAEA Mental Health Parity

When federal parity law overrides a CO-119 on behavioral health claims

The Mental Health Parity and Addiction Equity Act (MHPAEA) prohibits group health plans from imposing more restrictive limits on mental health/SUD benefits than on comparable medical/surgical benefits. A visit cap on behavioral health that doesn't exist for medical/surgical may violate federal law.

MHPAEA applies to these plan types

Employer-sponsored group health plans with 51+ employees
Fully-insured plans sold in the individual and small group market (ACA plans)
CHIP (Children's Health Insurance Program)
Medicaid managed care plans
Federal Employee Health Benefits (FEHB) plans

MHPAEA does NOT apply to

Employer-sponsored plans with fewer than 50 employees (small employer exemption)
Grandfathered health plans (pre-ACA)
Retiree-only plans
Plans that do not cover mental health at all (rare but still permissible for small employers)
Standalone dental or vision plans

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How to file a MHPAEA parity complaint

If you believe a CO-119 on a behavioral health or SUD claim reflects a parity violation: (1) Document the plan's BH visit limit; (2) Obtain the plan's medical/surgical outpatient visit limit (request the plan's comparative analysis — plans must provide this under the Consolidated Appropriations Act 2021); (3) If BH is more restricted, file a complaint with the Department of Labor (EBSA) at dol.gov for ERISA employer plans, or with your state insurance commissioner for fully-insured plans. Providers can also file on behalf of patients.

Step-by-Step Response

What to do when you see CO-119

Verify the payer's visit count — do not accept it without checking
Call provider services and ask for the complete list of dates of service they have counted toward this benefit category for this patient in the current benefit period. Compare to your own claim records. Look for: duplicate dates, dates you didn't bill, claims from another provider that are being pooled against this limit, or claims that were denied/reversed but still counting in the payer's tally. Payer tracking errors are common — especially when visits are shared across PT/OT/ST benefit pools.
Check for MHPAEA parity issues if the benefit is behavioral health or SUD
If CO-119 is on a mental health or substance use disorder claim, compare the plan's BH visit limit to its medical/surgical outpatient visit limit. Request the plan's MHPAEA comparative analysis (required by law). If the BH limit is more restrictive, file a parity complaint and appeal the denial with the parity argument. Do not write off BH CO-119 denials without checking parity compliance — this is frequently litigated and increasingly enforced.
Check your pre-notification documentation before deciding whether to bill the patient
Review the patient record for a signed financial consent, ABN-equivalent, or written notice that was given before the services were rendered after the benefit was exhausted. If documentation exists, you may bill the patient. If not, the balance is a provider write-off under most payer contracts. Do not send a patient statement for a CO-119 balance without confirmed pre-notification documentation in the chart.
Notify the patient and discuss their options
Contact the patient proactively. Explain the benefit has been exhausted and offer their options: self-pay at your rate, waiting for the benefit period to reset, secondary insurance coverage, or a medical necessity exception appeal if the plan allows. Patients who receive this notification in a structured conversation are far more likely to continue care and pay their balance than patients who receive an unexpected bill.
Update benefit tracking and set the 80% alert for this and future patients
Update this patient's benefit tracking record. Then check whether similar patients in your practice are approaching their benefit cap — run a report on active therapy patients showing visits used vs. allowed this period. Set an 80% threshold alert in your PM system going forward. Every CO-119 should trigger a system improvement so the next occurrence is caught before services are rendered, not after.

Real-Time Benefit Tracking

The 80% alert system — how to catch CO-119 before it happens

At Eligibility Verification (Day 1)

Capture benefit maximum: number of visits or dollar limit
Capture benefit period: calendar year vs. plan year (and reset date)
Capture visits/dollars already used if mid-period
Note whether PT, OT, ST share one pool or are separate
Record in PM system and on patient chart

Ongoing (Each Visit)

Decrement the visit counter after each billed date of service
PM system flags when patient reaches 80% of benefit
Clinical team notified: "X visits remain under insurance"
Patient notified and financial consent obtained for continuation
Document consent in chart before visit #[cap] is billed

At Benefit Reset

Reset visit counter at start of new benefit period
Re-verify benefit structure (caps can change annually)
Update PM system with new-year benefit information
Notify active patients their benefit has reset if they paused care

When CO-119 Is Received

Reconcile payer count vs. your records immediately
Dispute discrepancies before billing patient
Document root cause: were we tracking correctly?
Update PM system tracking if there was an error
Add this patient to the correction queue

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Medicare therapy cap: use Modifier KX when medically necessary above threshold

Medicare uses a financial limitation for outpatient therapy (PT+ST combined, and OT separate) — currently ~$2,230 per category annually as of 2026 (adjusted annually). Above the threshold, claims require Modifier KX to attest that the services are medically necessary. Claims above the threshold without KX will deny — not as CO-119 but as CO-50 (not medically necessary). KX documentation requirements must be met: a Plan of Care documenting medical necessity and functional goals must be in the record.

Prevention

How to prevent CO-119 from surprising patients or billing staff

Capture visit limits at initial eligibility verification and load them into your PM system as a trackable field. This is step one — you cannot track against a cap you haven't recorded. Ask the payer for the exact limit, benefit period, and current used count at the start of every new patient relationship and at the start of each new benefit year.
Set an 80% alert in your PM system that triggers a patient notification workflow. When a patient reaches 80% of their allowed visits, a task should be automatically created for the billing team to contact the patient, explain remaining benefits, and obtain a signed financial consent for self-pay continuation. This converts a surprise denial into a planned patient conversation.
Re-verify benefit maximums at the start of every plan year — they change. Employers change plan designs annually. A patient who had 30 PT visits last year may have 20 this year. Do not carry over benefit limit information from the prior year without verifying it is still correct for the current plan year.
Track PT, OT, and ST visit pools separately vs. combined. Many plans share PT, OT, and ST visits in a single combined pool. If you track each discipline separately without knowing they share a pool, you will over-count remaining benefits and under-prepare the patient. Always ask the payer: "Are PT, OT, and ST visits counted in a combined pool or separately?"
For behavioral health practices, perform a MHPAEA parity check on every new payer you credential with. Before accepting a new insurance plan, compare its BH visit/dollar limits to its medical/surgical limits. If the BH benefit is less generous, consult with your compliance officer or healthcare attorney before signing the contract — or before billing and absorbing CO-119 write-offs that may be legally challengeable.

Frequently Asked Questions: CO-119

CO-119 means the patient has reached the maximum benefit allowed for this type of service in the current benefit period — visit cap, dollar limit, or unit limit is exhausted. Common in PT/OT/ST, chiropractic, behavioral health, and DME. Steps: verify the payer's count, check MHPAEA parity for BH claims, confirm pre-notification before billing patient.

Only if you notified the patient before rendering the service that their benefit was exhausted and obtained their agreement to continue as self-pay. Without documented pre-notification, most payer contracts prohibit billing the patient — the balance is a provider write-off. Always check your documentation before sending a patient statement for a CO-119 balance.

MHPAEA prohibits group health plans from imposing visit caps or dollar limits on mental health/SUD benefits that are more restrictive than comparable medical/surgical benefits. If a plan has unlimited outpatient medical visits but caps behavioral health at 30/year, that cap likely violates MHPAEA. File a complaint with the DOL (for ERISA plans) or state insurance commissioner. MHPAEA applies to group plans with 51+ employees, ACA marketplace plans, CHIP, and Medicaid managed care.

CO-119 means the patient's total benefit maximum for the period is exhausted (e.g., 30 visits/year used up). CO-151 means the units or frequency on a specific claim exceed what the payer allows per claim or per time period (a Medically Unlikely Edit or frequency limit). CO-119 is a period/annual cap issue; CO-151 is a per-claim or per-episode frequency issue.

Call the payer and ask for the complete list of DOS they have counted toward this benefit for this patient in the current period. Compare to your records. Look for: duplicates, dates you didn't bill, another provider's visits counting in your pool, or reversed claims still being counted. Payer tracking errors are common — especially for therapy benefits that pool PT/OT/ST or cross multiple providers.

Capture visit limits at initial eligibility verification and load them into your PM system as a trackable field. Set an 80% alert to trigger a patient notification and financial consent workflow. Re-verify limits at the start of every plan year. Track combined PT/OT/ST pool vs. separate pools. This converts CO-119 from a surprise denial into a planned patient conversation.

Most benefit periods reset on January 1 (calendar year) or on the plan anniversary date (plan year). At reset, the visit count returns to zero and the patient is eligible for the full benefit again. Notify patients whose care was interrupted by a CO-119 that their benefit has reset and they can resume covered visits. Update your PM system with the new-year benefit information — plan designs can change annually, so re-verify the limit, not just reset the counter.

Related Codes

Benefit Maximum Reached for This Period