Why Timely Filing Denials Are Bleeding Behavioral Health Practices in 2026

Across the roughly 50 behavioral health practices we work with at Revenant Care Group, timely filing denials account for somewhere between 6% and 11% of total claim volume depending on payer mix. That is not a rounding error. For a mid-sized outpatient mental health group billing $2.5 million annually, that range translates to $150,000 to $275,000 in claims that hit a wall before a single clinical note is ever reviewed. The frustrating part is that nearly all of it is preventable with the right operational controls and a clear picture of what each payer actually allows.

The pattern we are seeing most often: practices apply a blanket 90-day assumption across all payers, which works fine for Medicare but quietly fails them on commercial Medicaid managed care plans and certain Blues affiliates that run tighter windows. This post lays out the actual limits we track, the CPT codes most frequently caught in timely filing traps, and what you can realistically recover when you fight back correctly.

Timely Filing Limits by Major Payer: The Reference Chart You Actually Need

The table below reflects 2026 payer guidelines as we currently work with them. Always verify against each payer’s most recent provider manual, because these windows do shift with contract renewals.

• Medicare (traditional Part B): 12 months from date of service. This applies to all Part B mental health claims including 90837, 90834, 90832, 90791, and 96130-96133 for psychological testing.
• Medicaid (fee-for-service, varies by state): Typically 90 days to 12 months. See state breakdown below.
• Anthem / Elevance Health (commercial): 90 to 180 days depending on state and group contract. California Anthem commercial is commonly 180 days; Indiana is 90 days.
• UnitedHealthcare (commercial and UHC Community Plan): 90 days standard on commercial; UHC Community Plan (Medicaid) can be as tight as 90 days from date of service in several states.
• Aetna / CVS Health: 180 days from date of service on most commercial group plans. Some self-funded ASO arrangements specify 90 days in the plan document.
• Cigna / Evernorth: 90 days standard on commercial plans. Behavioral health carved-out plans managed through Evernorth may follow a separate timeline stated in the sub-contract.
• TRICARE: 365 days from date of service for most mental health outpatient codes.
• Humana (commercial): 180 days from date of service. Humana Medicare Advantage plans follow the 365-day Medicare window.
• Blue Cross Blue Shield (varies by licensee): BCBS plans are independently operated. The most restrictive we track is BCBS of Mississippi at 90 days. BCBS of Illinois runs 365 days on most commercial products. Always pull the provider manual for the specific BCBS affiliate.

State Medicaid Timely Filing Windows: What the Managed Care Plans Frequently Override

This is where we see the most confusion. State Medicaid fee-for-service may publish one window, but the managed care organizations (MCOs) contracted in that state often apply a shorter window defined in their own provider agreements. Here are the state Medicaid fee-for-service baselines we commonly reference:

• California (Medi-Cal): 12 months from date of service for most BH codes including 90837 and H0004.
• Texas (Texas Medicaid): 95 days from date of service. This is one of the tightest state FFS windows in the country and it catches practices off guard constantly.
• Florida (Florida Medicaid): 12 months from date of service for outpatient mental health.
• New York (NY Medicaid): 90 days for most outpatient behavioral health claims. OMH-licensed clinics have historically been held to this 90-day window under MAPP.
• Ohio (Ohio Medicaid): 12 months from date of service.
• Illinois (Illinois Medicaid): 180 days from date of service.
• Pennsylvania (PA Medicaid): 180 days from date of service.
• Georgia (Georgia Medicaid): 12 months from date of service.
• Michigan (MI Medicaid): 12 months from date of service for fee-for-service; MDHHS-contracted Medicaid health plans vary by contract and are commonly 90 to 180 days.

The critical operational note here: when a patient is enrolled in a Medicaid MCO rather than straight fee-for-service, your timely filing clock runs under the MCO contract, not the state Medicaid manual. We have seen practices lose legitimate Texas Medicaid managed care claims because they assumed the 95-day FFS window was their only constraint, not realizing the MCO had a separate 60-day window buried in page 47 of their provider agreement.

The CPT Codes Getting Caught Most Often and Why

Not all codes carry equal timely filing risk. The codes we see denied for timely filing most frequently in behavioral health billing are:

• 90837 (60-minute individual therapy): High volume, and often entered in batches at the end of a clinician’s week. That lag at the point of documentation entry is where 10 to 14 days can silently disappear before a claim is even created.
• 90853 (group psychotherapy): Multi-patient claims often require authorization verification across several member IDs before billing. The administrative hold-up frequently pushes these past tight commercial windows.
• H0004 (behavioral health counseling, non-physician): Common on Medicaid MCO plans. The code itself is straightforward but the authorization dependency adds lag.
• 96130 and 96131 (psychological testing, examiner time): Testing episodes can span multiple dates, and the practice often waits until the written report is finalized before billing, which can add three to six weeks to the billing lag from the first date of service.
• 90791 (psychiatric diagnostic evaluation): Initial evaluations are frequently delayed in billing because practices are waiting for the clinician to complete intake documentation. If your window is 90 days and your documentation turnaround is 30 days, you have left yourself a narrow margin for any correction cycle.

Place of service codes also factor in. Claims billed under POS 02 (telehealth, patient home) have had additional payer-specific policy overlays post-2023 that can affect whether a payer even processes the claim under the same timely filing rules as POS 11 (office). We have seen UHC and Cigna apply different adjudication paths based on POS, which occasionally triggers a timely filing denial on a resubmitted corrected claim that was originally denied for a different reason entirely.

How to Actually Recover Timely Filing Denials (And What the Recovery Rate Looks Like)

Timely filing denials carry a reputation for being unwinnable, but that is not accurate in our experience. The recovery rate on timely filing appeals where the practice can demonstrate internal system error, clearinghouse rejection documentation, or payer-side acknowledgment of receipt is typically 40% to 65% of appealed claim value when the documentation package is complete.

What constitutes a strong appeal package for a timely filing denial:

• Clearinghouse transmission report showing the date the claim was sent to the payer within the filing window
• ERA or EOP documentation showing the claim was initially denied for a different reason (eligibility, authorization), which legally tolls the timely filing clock with most payers
• State insurance department complaint letter, which carries significant weight with commercial payers particularly on mental health parity grounds when the denial pattern shows BH claims being processed differently than equivalent medical claims
• Written provider agreement language confirming the timely filing window the payer is claiming to enforce

For a practice billing $1 million annually with a 6% timely filing denial rate, that is $60,000 in denied claims. If 50% of those are recoverable with a proper appeal process, you are looking at $30,000 in recoverable revenue that most practices simply write off. At $2.5 million billing volume the math becomes $75,000 in recoverable revenue per year from this denial category alone.

Prevention Is Cheaper Than Recovery: Operational Controls That Actually Work

The practices in our network that hold timely filing denials below 2% of claim volume share a few common operational features:

• Payer-specific billing lag thresholds in their practice management system: Rather than relying on a single global rule, they configure alerts at 30 days, 60 days, and 80% of each payer’s specific window. For a 90-day payer, that means an alert fires at 72 days, leaving time for a correction cycle before the hard wall.
• Daily claim creation rather than weekly batching: Clinician documentation completed within 24 to 48 hours of service, with claims dropping daily. This eliminates the batch-lag problem that inflates effective billing lag by 5 to 12 days on average.
• Authorization expiration monitoring linked to billing workflow: Expired authorizations are one of the most common reasons a claim gets held in a worklist past the timely filing window. If your auth management and your billing queue are not talking to each other, you will bleed denials.
• Systematic tracking of corrected claim submission dates: When a claim is corrected and resubmitted, the timely filing window for the corrected claim can differ from the original. Some payers restart the clock from the corrected claim date; others hold you to the original date of service. Knowing which payer does which is non-negotiable.

SUD practices using drug screen billing codes like G0480 through G0483 face additional complexity here, because those claims sometimes travel through a different adjudication pathway. If you are billing definitive drug screens and seeing inconsistent timely filing behavior, the G0480-G0483 coding and reimbursement guidance we have published covers how to structure those claims to minimize adjudication delays.

Take Action on Your Timely Filing Exposure This Month

If you do not have a clean picture of your timely filing denial rate by payer right now, you are almost certainly underestimating the revenue exposure. The practices that reach out to us after a denial audit almost always find that timely filing losses are two to three times larger than their internal reporting suggested, because write-offs in this category frequently get coded as administrative rather than tracked as appealable denials. We offer a free 30-day denial audit specifically designed to quantify this exposure and build a recovery plan around what is actually salvageable. If you want to see the real number for your practice, schedule a time with our team here and we will get started within the week.