From Contract to Clean Claim: Navigating the OMH/OASAS Revenue Cycle 

By Olga Khabinskay, Director of Operations, WCH 

For behavioral health providers working with OMH (Office of Mental Health) and OASAS (Office of Addiction Services and Supports) licensed facilities, the path to clean claims and consistent revenue is fraught with obstacles. After years of working with outpatient providers across New York and beyond, I’ve witnessed firsthand how credentialing delays, unclear contract terms, and ever-changing payer rules create revenue cycle bottlenecks that can stall practices for months. 

The Real Challenge Isn’t Just Billing 

When providers think about revenue cycle management, they often focus on claim submission. But the truth is, most billing problems start long before that first claim goes out. The real challenge begins with credentialing, contracts, and understanding the complex web of payer requirements that govern OMH/OASAS reimbursement. 

Over the past few years, insurance companies have fundamentally changed how they interact with providers. Communication channels have narrowed, documentation requirements have become opaque, and the support that providers once relied upon has diminished. This shift means that practices must become more proactive and strategic in how they approach every stage of the revenue cycle. 

Credentialing: The Foundation of Clean Claims 

Credentialing delays remain one of the most significant barriers to timely revenue. What used to be a 90-day process can now stretch to six months or longer, especially with commercial insurers. The process has become less defined, with unclear submission requirements and limited visibility into application status. 

To accelerate credentialing, providers need to implement standardized processes from the moment they hire a new clinician. This means creating comprehensive onboarding packets that capture all essential information upfront: CAQH user credentials, NPI details, taxonomy codes, malpractice insurance, and service location information. Every field matters because insurance companies rely on this data for their internal credentialing systems. 

One critical step that’s often overlooked is verifying that the clinician’s CAQH profile reflects your facility’s location and tax ID information. This alignment is essential for smooth credentialing, yet it’s frequently missed during the hiring process. 

Equally important is implementing checkpoint workflows—roadmaps that track where each provider is in the credentialing journey. Weekly monitoring of application submissions, follow-ups, and effective date confirmations creates accountability and prevents providers from falling through the cracks. 

The Revalidation Trap 

Credentialing isn’t a one-time event. Revalidation and re-attestation requirements create ongoing risks. I’ve seen providers suddenly disappear from networks because they failed to revalidate their Medicare enrollment or update their CAQH profile. Major payers like Carelon and EmblemHealth have been particularly aggressive in removing providers who miss these deadlines. 

The solution is systematic tracking. Whether you use credentialing software or a well-maintained Excel spreadsheet, you need automated reminders for Medicare revalidation, Medicaid validation, and CAQH attestation dates. When all three elements are current, you can confidently submit rosters and maintain network participation. 

Understanding APG vs. Fee-for-Service Methodologies 

Contract management adds another layer of complexity. Different payers apply different methodologies—some use APG (Ambulatory Patient Groups) rates, others use fee-for-service models, and some default to Medicare rates. Providers must clearly understand which methodology applies to each payer and ensure their billing systems are configured accordingly. 

I recommend mapping every CPT code to its appropriate rate schedule in your system. This enables real-time analysis of denials and underpayments by comparing what you’re actually receiving against your contracted rates. Many modern billing platforms now incorporate AI tools that can automate this reconciliation process, flagging discrepancies that warrant investigation. 

Remember: as a participating provider, you have the right to renegotiate your contract every three years. Based on your patient volume, case mix, and practice growth, there’s often room for rate increases. Don’t leave money on the table by accepting outdated fee schedules signed years ago. 

Building Payer Relationships 

One of the most valuable lessons I’ve learned is the importance of establishing direct relationships with payer representatives. Knowing your regional territory manager by name—and maintaining regular communication with them—can transform how quickly issues get resolved. 

These representatives need to understand your clinic’s size, scope, and role in the community. Regular updates about your provider rosters, patient volumes, and service lines help them prioritize your concerns when problems arise. And problems will arise—credentialing delays, claim denials, rate discrepancies. Having an established relationship means you have a direct line to someone who can actually help. 

Several payers have started offering new communication channels. Optum, for example, recently launched a chat function for resolving claims issues in real time. These tools can significantly reduce the time spent on hold with customer service departments. 

Strategic Denial Management 

When denial patterns emerge, the key is identifying whether they’re isolated incidents or systemic issues. Categorize denials by payer, plan type (HMO, PPO, EPO), procedure code, and provider specialty. This analysis often reveals patterns that point to technical errors in payer systems or misunderstood billing requirements. 

For systemic errors affecting multiple claims, don’t request individual reprocessing. Instead, document the pattern and request a “special claims project”—a batch review and correction. This approach is far more efficient and demonstrates to the payer that they have a technical issue requiring their attention. 

If a payer consistently ignores your appeals or fails to respond within reasonable timeframes, it’s time to escalate to your state’s Department of Financial Services. In New York, DFS intervention has proven effective in resolving disputes that insurers have delayed for 90 days or longer. The key is documenting everything: who you spoke with, what issues you raised, how long they’ve persisted, and how they’re disrupting patient care. 

Real-World Denial Scenarios 

Let me share a few specific examples that many providers encounter: 

Healthfirst Telehealth Denials: Healthfirst Medicare plans require modifier 95 for telehealth services, while Healthfirst Medicaid plans require modifier GT. Mixing these up leads to automatic denials. The plan ID structure provides a clue: Medicaid plans include letters (like ABC12345DE), while Medicare plans are all digits (like 800000000). 

1199 SEIU Coding Requirements: Unlike most payers, 1199 requires CPT codes rather than HCPCS codes for institutional claims. For example, use 90853 instead of H0005 for group counseling, and 90834 instead of G0397 for individual therapy. The Substance Abuse Billing Manual provides a complete conversion table. 

Medicaid Coordination of Benefits Issues: When Medicaid shows an old third-party insurer as active, claims are denied even though the coverage was terminated years ago. Updating COB can take months. The workaround: bill the outdated plan first to obtain a denial, then resubmit through ePACES with the denial information in the “Other Payer” fields, using PR in the Claim Adjustment Group and code 27 (indicating coverage termination) in the Reason Code field. 

MetroPlus Underpayments: Some MetroPlus commercial plans pay below Medicaid rates, despite Part AA of Chapter 57 of the Laws of 2024 requiring commercial plans to reimburse OMH/OASAS services at minimum Medicaid APG rates. These underpayments can be disputed through the MetroPlus provider portal by referencing this statute. 

Success in OMH/OASAS billing requires a proactive approach to every stage of the revenue cycle. Clean claims start with a clean setup—proper credentialing, accurate contract loading, and a thorough understanding of payer-specific requirements. But beyond technical accuracy, success requires relationship-building, persistent communication, and strategic escalation when needed. 

Insurance companies will continue changing their processes, often in ways that create new challenges for providers. Our job is to stay informed, document everything, and advocate firmly for fair reimbursement. When done correctly, these practices bring order, visibility, and predictability to your revenue cycle.