Severance appropriate

Joinder and Severance in No-Fault Insurance Litigation

Medical providers frequently consolidate no-fault claims arising from multiple assignors into single lawsuits seeking to achieve litigation efficiency and reduce filing costs. While CPLR 601 permits joinder of claims involving “common questions of law or fact,” CPLR 603 authorizes courts to sever improperly joined claims when consolidation prejudices defendants or creates confusion. This tension between plaintiff efficiency and defendant fairness generates substantial motion practice in New York’s no-fault insurance litigation.

Healthcare providers argue that consolidating claims involving the same insurance carrier serves judicial economy by avoiding repetitive litigation over common defenses like fee schedule reductions or standardized denial reasons. Insurance carriers counter that multi-assignor cases burden defendants with disparate factual scenarios, different coverage periods, and unique defenses applicable to individual assignors. The Austin Diagnostic Med. decision addresses the circumstances warranting severance when a provider joins claims from separate motor vehicle accidents.

Understanding severance standards has practical significance for both providers and carriers. Providers must evaluate whether consolidating multiple assignor claims creates severance vulnerabilities that ultimately increase litigation costs rather than reducing them. Carriers must determine when to seek severance and what showing suffices to obtain relief under CPLR 603. The Appellate Term’s guidance establishes relatively lenient standards favoring severance when claims arise from different accidents.

Case Background: Multiple Assignors from Different Accidents

Austin Diagnostic Med., P.C. v Mercury Cas. Co., 2015 NY Slip Op 51680(U)(App. Term 2d Dept. 2015)

(1)“Plaintiff commenced this action to recover first-party no-fault benefits as assignee of nine individuals. The complaint alleged separate causes of action for each assignor. Defendant moved, pursuant to CPLR 603, to sever the second through ninth causes of action into separate actions, arguing that the nine causes of action arose out of six separate motor vehicle accidents and that each of the nine causes of action involves different questions of fact and law. By order entered May 29, 2013, the Civil Court denied defendant’s motion.”

(2) “Plaintiff commenced this action to recover first-party no-fault benefits as assignee of nine individuals. The complaint alleged separate causes of action for each assignor. Defendant moved, pursuant to CPLR 603, to sever the second through ninth causes of action into separate actions, arguing that the nine causes of action arose out of six separate motor vehicle accidents and that each of the nine causes of action involves different questions of fact and law. By order entered May 29, 2013, the Civil Court denied defendant’s motion.”

(3) “defendant’s motion to sever the second through ninth causes of action into separate actions is granted”

Jason Tenenbaum’s Analysis:

All that is necessary is to assert through the answer that there is a different defenses and that is it. There is no need to attach denials or to present proof that the matters involves different defenses. But let us assume a defense moves to serve. A Plaintiff can probably defeat the motion by attaching proof that the claim involves the same fee schedule issue or same medical necessity defense. However, standing moot will not defeat the motion.

Legal Significance: Minimal Showing Required for Severance

The Appellate Term’s reversal of the Civil Court’s denial establishes that insurance carriers need not make extensive evidentiary showings to obtain severance in multi-assignor no-fault cases. The defendant satisfied its burden by identifying in its answer that different defenses applied to the various causes of action and explaining that claims arose from separate motor vehicle accidents involving different factual and legal questions. This minimal showing shifted the burden to the plaintiff to demonstrate sufficient commonality to justify continued joinder.

The decision reflects judicial recognition that consolidating claims from different motor vehicle accidents creates practical litigation difficulties for defendants. Each assignor may have different coverage issues, accident circumstances, treatment patterns, and applicable defenses. Requiring defendants to defend consolidated claims involving disparate accidents and assignors in a single action creates confusion and potential prejudice, particularly during discovery and at trial when evidence regarding different assignors and accidents risks conflation.

CPLR 603 grants courts broad discretion to sever claims “in furtherance of convenience or to avoid prejudice.” The Austin Diagnostic Med. decision demonstrates that this discretion tilts toward severance when claims arise from separate motor vehicle accidents, even when the same insurance carrier is involved and similar defenses might apply. Courts recognize that whatever efficiency gains result from consolidation pale compared to the organizational complexity and prejudice risks defendants face when forced to defend multiple unrelated accident claims in unified proceedings.

Practical Implications: Strategic Considerations for Providers and Carriers

For medical providers, the Austin Diagnostic Med. decision underscores the risks of joining claims from multiple assignors involved in different motor vehicle accidents. While consolidation may appear efficient initially, severance motions can fragment cases, multiplying filing fees, motion costs, and trial appearances. Providers should carefully evaluate whether claimed efficiencies justify joinder given the high probability that defendants will successfully move for severance.

Jason Tenenbaum’s analysis identifies potential strategies for providers opposing severance. Attaching proof that claims involve identical fee schedule defenses or medical necessity challenges affecting all assignors might demonstrate sufficient commonality to defeat severance. If the carrier applied uniform policies resulting in identical denial reasons across all assignors, providers can argue that judicial economy favors consolidated treatment. However, as Tenenbaum notes, asserting that the carrier’s standing has been mooted through settlement or payment will not defeat severance motions, as standing issues do not establish common questions warranting consolidation.

For insurance carriers, the decision confirms that severance motions require minimal evidentiary support. Carriers need not attach denial letters or detailed proof of different defenses. Simply asserting in the answer that different defenses apply to various causes of action and identifying that claims arose from separate accidents suffices to establish prima facie entitlement to severance. This low threshold encourages carriers to seek severance routinely when providers consolidate multi-assignor claims from different accidents.

The decision also impacts fee considerations. When severance motions succeed after substantial litigation activity, filing fees multiply and providers face increased costs defending what become separate actions. Carriers should move for severance early in litigation before significant motion practice or discovery occurs, maximizing the cost burden on providers and potentially encouraging settlement. Providers must factor potential severance costs into case valuation when deciding whether to consolidate claims.

Key Takeaway

The Appellate Term’s decision in Austin Diagnostic Med. establishes that insurance carriers obtain severance in multi-assignor no-fault cases through minimal showings that claims arise from different motor vehicle accidents and involve different factual and legal questions. Carriers need not attach denial letters or detailed proof of disparate defenses; assertions in the answer that different defenses apply suffice. While providers might defeat severance by demonstrating identical fee schedule or medical necessity issues affecting all assignors, such commonality rarely exists when claims derive from separate accidents with different coverage periods and treatment patterns. The decision’s practical effect discourages providers from consolidating assignors from different accidents, as severance vulnerability often eliminates efficiency gains and multiplies litigation costs.

Related Articles

• Understanding when severance is appropriate in no-fault cases with multiple assignors
• Court rules on severance requirements for multiple assignor claims
• Severance denied in multi-assignor no-fault case
• Requirements for NF-10s in severance proceedings
• Reality of severance challenges in no-fault litigation

Legal Update (February 2026): Since this 2015 decision, New York’s no-fault fee schedules and reimbursement rates have undergone multiple regulatory updates, and procedural requirements for severance motions in no-fault cases may have evolved through subsequent appellate decisions and regulatory amendments. Practitioners should verify current fee schedule provisions under 11 NYCRR Part 65 and review recent case law regarding joinder and severance standards in no-fault collection actions.