Mental Health AR Days: BH Revenue Cycle Benchmarks for 2026

We work with roughly 50 behavioral health practices across outpatient mental health, ABA, and SUD settings, and the number we get asked about most often is not collections rate or denial rate. It is AR days. Specifically: “Is our beginning-of-month AR normal, or are we bleeding somewhere we cannot see?” The honest answer is that most BH practices are sitting 15 to 22 days above where they should be, and the gap is almost never one catastrophic problem. It is four or five compounding ones.

This post gives you the actual benchmarks we track at the CPT-code and payer-level, what drives deviation from those benchmarks, and where the recoverable dollars are hiding for practices ranging from $1.5M to $12M in annual collections. If you are a CFO or RCM director reviewing your July or August BOM AR report right now, this should give you something concrete to act on today.

What Benchmark AR Days Actually Look Like in Behavioral Health

The widely cited “under 40 days” benchmark for medical practices does not apply cleanly to behavioral health. Because BH payers routinely impose additional medical necessity review steps, concurrent review requirements, and authorization ladders that do not exist in primary care, we benchmark differently by payer class:

• Commercial/managed care (non-Medicaid): 38 to 45 days is acceptable. Above 52 days signals a systemic problem.
• Medicaid fee-for-service: 45 to 55 days is normal due to processing cycles. Above 65 days warrants a payer-level audit.
• Medicaid managed care organizations (MCOs): 50 to 60 days. MCO BH carve-outs frequently run slower than medical counterparts.
• Medicare (including Advantage): 28 to 35 days for clean claims. Above 42 days almost always points to a credentialing or taxonomy mismatch.

When we pull a BOM AR aging snapshot for a new client, the first filter we apply is percentage of AR over 90 days. For a healthy behavioral health practice, that number should be at or below 12 percent of total outstanding. We regularly see new clients coming in at 22 to 31 percent over 90 days. At a $3M annual collections practice, every 10-point increase in that over-90 percentage represents roughly $75,000 to $90,000 in collectible claims that are aging toward write-off.

The CPT Codes Where AR Days Are Longest in Mental Health Billing

Not all codes age equally. Here is what we observe consistently across our client base for codes that pull AR days up disproportionately:

• 90837 (60-minute psychotherapy): This is the highest-volume code in outpatient mental health, and it is also the most frequently flagged for medical necessity review by commercial payers. Average days to payment on 90837 when authorization is not pre-secured runs 58 to 72 days versus 31 to 38 days on clean authorized claims.
• H0004 (behavioral health counseling, per 15 minutes): Common in SUD settings and community mental health. Modifier and POS mismatches here are chronic. We see POS 11 (office) billed when the service was delivered in POS 57 (non-hospital residential) or POS 53 (urgent care), resulting in automatic downcoding or denial on about 18 percent of claims at practices that have not audited their superbills recently.
• 90847 (family psychotherapy with patient): This code triggers coordination-of-benefits disputes at a higher rate than almost any other BH code. Average AR days on disputed 90847 claims: 68 to 84 days.
• 97153 and 97155 (ABA direct therapy and protocol modification): These two codes account for the majority of ABA revenue and carry the longest authorization chains. We benchmark clean AR days at 42 to 50 days for 97153 with valid auth on file. Without auth, that jumps to 75 plus days and denial rates hit 34 to 40 percent on first submission.

Modifier Errors That Inflate AR Days Silently

Modifier misuse is the single most underdiagnosed driver of extended AR days in the practices we audit. The errors are not random. They cluster around three patterns:

First, the GT modifier (telehealth via interactive audio and video) is still being applied to synchronous telehealth claims that should now carry the 95 modifier for most commercial payers and Medicare Advantage plans as of 2024 forward. GT on a commercial plan that requires 95 triggers a soft denial that often sits in a payer-side queue for 25 to 40 days before the practice even sees a remittance.

Second, HO and HN modifier stacking in SUD and CCBHC billing is frequently incorrect relative to the credential level of the rendering provider. A claim billed with HN (bachelor’s level) for a service delivered by a licensed professional counselor should carry HO (master’s level). Payers that credential-check against the NPI taxonomy record will auto-deny or reduce payment, and the ERA often does not provide a remark code that makes the root cause obvious.

Third, for outpatient mental health billed under POS 11, missing or incorrect Place of Service 02 (telehealth, patient at home) versus POS 10 (telehealth, patient in health professional shortage area) continues to generate delays in 2026 as payers enforce geographic eligibility requirements more strictly post-PHE.

MHPAEA Denials Are a Hidden AR Days Driver Most Practices Ignore

One pattern we track that does not appear in standard AR aging reports is the volume of denials rooted in parity violations. When a commercial payer applies a treatment limitation to a BH service that it would not apply to a comparable medical or surgical service, that is a potential MHPAEA violation, and those denials are recoverable. We have seen practices collect between 60 and 78 percent of overturned MHPAEA-based denials on appeal when the appeal is constructed correctly with comparative benefit analysis documentation.

For a $5M behavioral health practice with a 14 percent commercial denial rate, even a conservative assumption that 20 percent of those denials are parity-based represents $140,000 in annual recoverable revenue that is currently sitting in or beyond the 90-day AR bucket. If your team does not have a structured process for identifying and appealing these claims, that money is likely heading toward write-off. We cover the appeal mechanics in detail in our post on MHPAEA parity appeals and how behavioral health practices are leaving money on the table.

What to Audit First When Your BOM AR Days Are Above Benchmark

When we take on a new behavioral health client who comes in above benchmark, the first 30 days of our engagement follow a consistent sequence. We start with the over-90-day commercial bucket and pull denial reason codes by frequency. In virtually every practice we have audited, three to five reason codes account for 60 to 70 percent of the dollar volume in that bucket. The work is not distributed evenly across dozens of denial types. It concentrates.

For SUD practices specifically, drug screen coding is almost always part of that concentration. Practices billing G0480 or G0483 for definitive drug testing frequently under-code the number of drug classes tested, which means they are collecting $38 to $52 per test when the correct coding would support $160 to $280 depending on payer and panel size. That is not an AR days problem in the traditional sense, but it inflates the effective cost of your AR by reducing the revenue base. We have documented this specific pattern in our piece on G0480-G0483 drug screen coding and the 4-5x revenue gap most SUD practices are leaving behind.

After the over-90 commercial review, we move to the 60-to-90-day Medicaid MCO bucket, then to a credentialing cross-check against active claims to identify any NPI or taxonomy issues silently blocking payment. In most practices, this three-step sequence surfaces 80 percent of the recoverable AR within the first two weeks.

Practice-Size Benchmarks for Recovery Expectations

Recovery potential from a structured AR remediation effort varies by practice size, but here are the ranges we see consistently:

• $1.5M to $3M annual collections: Recoverable AR from a 90-day remediation effort typically runs $45,000 to $110,000, with the largest portion in commercial over-90-day claims.
• $3M to $6M annual collections: Recoverable range of $120,000 to $280,000. At this size, parity-based appeal recovery and modifier correction are the two largest levers.
• $6M to $12M annual collections: $300,000 to $650,000 is achievable within 90 to 120 days when the practice has not had a formal denial management workflow in place. The over-90-day MCO Medicaid bucket is often the single largest recovery source at this volume.

These are not projections. They are ranges drawn from actual remediation outcomes across our client base, and they assume a practice that is actively billing but has not had a structured denial and AR management process running consistently.

If your BOM AR days are running above the benchmarks in this post, or you want to know exactly which denial codes are driving your over-90-day balance, we offer a free 30-day denial audit with no obligation. You will come out of it knowing your top five denial drivers by dollar volume, your recoverable AR estimate by payer class, and the specific coding or process corrections that will move the needle fastest. Book a time on our calendar here and we will get started within one business day.