Why Are My Insurance Claims Stuck in Pending?

Danielle Wagar
3 days ago
6 min read

You submit a batch of claims through your clearinghouse, check your dashboard a week later, and notice a handful are marked as pending. Another week passes, then a month, and nothing moves. The money sits in administrative limbo while your practice overhead keeps running. For solo and small group mental health, physical therapy, occupational therapy, and speech-language pathology practices, watching revenue freeze behind an insurance wall is one of the more demoralizing parts of running a private practice.

When a claim sits in pending status with commercial payers like Aetna, Optum, Blue Cross Blue Shield, or Cigna, it means the insurance company has received the electronic file but paused the automated adjudication process. The claim has not been approved and has not been officially denied, which leaves you with no rejection code to work from.

Understanding why these claims stall is the first step, but in most cases, the fix is not as simple as checking a box.

The Hidden Credentialing Gaps That Stall Claims

The most common reason a pending insurance claim stalls indefinitely is an underlying provider enrollment issue. Many practice owners assume that because they received a welcome letter or can see their profile in CAQH ProView, they are fully cleared to bill. CAQH is a digital storage locker for your professional information, not an active insurance contract, and the two are not always in sync.

If you recently completed your credentialing or transitioned away from a managed care billing platform like Headway or Alma, a payer may still be building your contract configuration in their internal system. When a claim arrives before that update is complete, the automated process routes it to a holding queue rather than rejecting it outright. This happens frequently with Blue Cross Blue Shield local plans, where individual state networks process paperwork on vastly different timelines. A CAQH profile that has not been re-attested recently compounds the problem significantly. If your CAQH profile needs a full audit, our CAQH Setup and Mastery Guide walks you through exactly what payers are checking.

Group practices face a similar bottleneck when adding new staff. If you have an aggregate group contract but have not completed the linked provider enrollment process for a newly hired therapist, the claim will sit in pending. The insurance company recognizes your group tax identification number, but the rendering provider NPI triggers an internal mismatch that requires a human reviewer, and those queues move slowly.

Taxonomy Codes and NPI Mismatches

Payer validation systems have become significantly more rigid about national provider identifier details. Optum Behavioral Health now requires both the billing and rendering provider NPI numbers, alongside matching taxonomy codes, to pass automated clearinghouse edits. If your clearinghouse lets a claim through with a missing or generic taxonomy code, the payer system will often freeze it during the validation phase, sometimes without any notification to you.

For rehab therapists and mental health professionals, taxonomy precision matters across every single claim. An individual licensed clinical social worker requires a specific behavioral health taxonomy code, while a physical therapist needs a distinct code matching their licensure. If you operate a small group practice and use your Type 2 group NPI in the billing loop but mistakenly repeat it in the rendering provider box, the claim enters a processing loop it cannot exit without manual intervention. These errors are easy to miss and time-consuming to untangle once they compound across a billing cycle.

Missing Modifiers and Telehealth Coding Shifts

Coding discrepancies are another significant source of administrative delays, particularly for practices that expanded into telehealth and have not had their billing audited since. Since the introduction of distinct place of service codes for virtual care, commercial payers have updated their adjudication algorithms to scrutinize telehealth claims with considerably more precision than they did a few years ago.

Mental health sessions billed via telehealth must carry the correct place of service code alongside the appropriate modifier to verify the synchronous nature of the visit. Rehabilitation therapists face similar requirements with therapy-specific modifiers that denote the applicable plan of care. When these are missing or placed on the wrong service line, the payer system halts processing entirely. What looks like a simple omission on the front end can translate to weeks or months of delay, and by the time you identify the pattern, you may have an entire billing period with the same error running through it. If you are also trying to benchmark what these sessions should be reimbursing, our breakdown of CPT 90837, 90834, and 90832 rates for 2026 is a useful reference point.

Payer Portal Delays and Internal Backlogs

Sometimes a pending claim has nothing to do with your data. Internal insurance backlogs and clearinghouse routing errors routinely delay processing, and when a major commercial payer migrates their internal systems, claims can land in temporary holding queues without any notice to the provider.

These delays rarely appear on your standard electronic remittance advice right away. Logging directly into individual payer portals often reveals that a claim is waiting on coordination of benefits documentation from the patient, a detail that will not surface in your EHR dashboard. When an insurance company requires a subscriber to update their other insurance information, all incoming claims go into pending until the member responds. The payer will not issue a formal denial to the practice in the meantime, and they are not required to alert you.

When to Stop Waiting and Get Help

There is a reasonable amount of follow-up any practice owner can do on their own: checking clearinghouse acceptance reports, logging into payer portals, and verifying that CAQH is current. Beyond that, the process requires payer-specific knowledge, provider relations contacts, and the kind of documentation trail that takes time most clinicians do not have. When claims have been sitting for more than forty-five days without a clear explanation, or when you are seeing the same pending pattern repeat across multiple patients or payers, that is typically a sign of a systemic enrollment or billing configuration issue that needs expert eyes.

Untangling those issues while simultaneously keeping up with new claim submissions is the part that tends to push practices into a deeper revenue hole before things improve. If you want to understand how a clean billing workflow prevents these problems from developing in the first place, Intake to Income covers the full billing cycle for therapy practices.

Frequently Asked Questions

How long can an insurance company legally leave a claim in pending status?

Most states have clean claim laws requiring commercial payers to pay or deny an electronic claim within thirty to forty-five days of receipt. If a payer places a claim in pending because they require additional information from the provider or patient, that clock stops until the information is submitted.

What is the difference between a rejected claim and a pending claim?

A rejected claim failed front-end validation at the clearinghouse or payer entry point and was never accepted into the system. A pending claim entered the insurance system successfully but has been paused during internal review. The two require completely different resolution paths, which is why it matters to know which one you are dealing with before you start making calls.

Why does Optum show my claims as pending for weeks?

Optum frequently holds pending insurance claims when there is a mismatch between the rendering provider NPI and the billing provider tax identification number in their system. This often traces back to credentialing paperwork that is still processing or mandatory EDI and ERA enrollment forms that were not completed at the time of contracting.

Can I submit a corrected claim while the original is still pending?

This is not recommended. Submitting a corrected claim while the original is still active often creates a duplicate claim error that extends your reimbursement timeline further. The original needs to finalize or be withdrawn through the provider line before a corrected version can be submitted cleanly.

Take Control of Your Practice Revenue

Watching earned revenue sit in pending while an insurance company works through its internal backlog is not a sustainable way to run a practice. The follow-up process is detailed, payer-specific, and unforgiving of gaps in documentation.

Upstate Healthcare Administration handles insurance billing and credentialing for mental health and rehabilitation therapy practices, including the claim follow-up, enrollment troubleshooting, and payer escalations that keep revenue moving. If your claims are stuck and you are not sure why, that is exactly the conversation we should have.