51 JFK Parkway, Short Hills, NJ 07078
Diana Yastrovskaya, Partner at Health Law Alliance
Insights by

Diana Yastrovskaya

Partner

Partner at Health Law Alliance focused on healthcare defense and regulatory litigation. Defends companies and individuals nationwide in healthcare-related criminal, civil, and administrative proceedings.

  • Recognized as a "Rising Star" in healthcare litigation
  • Cardozo Law, magna cum laude
  • Cardozo Law Review editor
  • Defends matters before DOJ, State AGs, HHS-OIG, DEA, state MFCUs, and licensing boards
  • Fluent in Russian
44 articles published

Articles by Diana

Understanding UPIC Audits: A Guide for Healthcare Providers, Pharmacies, and Medical Practices
Healthcare Fraud Defense

Understanding UPIC Audits: A Guide for Healthcare Providers, Pharmacies, and Medical Practices

UPIC audits are serious government probes into suspected Medicare and Medicaid billing errors that can quickly turn from a simple…

May 24, 2026
PBM Member Denial Audit Findings: A Growing Threat to Pharmacies
PBM Audits & Defense

PBM Member Denial Audit Findings: A Growing Threat to Pharmacies

Pharmacies undergoing a Pharmacy Benefit Manager (PBM) audit are typically prepared to address inventory discrepancies and documen…

Apr 10, 2026
From Minor PBM Audit Finding to Major Liability: How Small Issues Trigger Big Consequences
PBM Audits & Defense

From Minor PBM Audit Finding to Major Liability: How Small Issues Trigger Big Consequences

Pharmacies often approach a PBM audit with the understanding that small discrepancies and modest recoupments are simply part of do…

Apr 10, 2026
HLA Wins Full Reversal of PBM Credentialing Denial for an Independent Pharmacy
PBM Audits & Defense

HLA Wins Full Reversal of PBM Credentialing Denial for an Independent Pharmacy

This week, Health Law Alliance achieved full reversal of a PBM credentialing denial for a New York pharmacy, mere weeks after it r…

Mar 19, 2026
Why Even Minor Documentation Errors Can Be Costly for Pharmacies Facing a PBM Audit
PBM Audits & Defense

Why Even Minor Documentation Errors Can Be Costly for Pharmacies Facing a PBM Audit

PBMs are using rigid documentation standards to recoup payments and pressure pharmacies. Minor clerical errors can now threaten re…

Jan 9, 2026
The Hidden PBM Threat Putting Pharmacies at Risk: Affiliation-Based Network Terminations
PBM Audits & Defense

The Hidden PBM Threat Putting Pharmacies at Risk: Affiliation-Based Network Terminations

PBMs are quietly expanding their power, terminating pharmacies based on affiliation rather than wrongdoing and putting entire busi…

Jan 9, 2026
Health Law Alliance Successfully Defends a New York Pharmacy in an Optum Audit
PBM Audits & Defense

Health Law Alliance Successfully Defends a New York Pharmacy in an Optum Audit

Facing an Optum PBM audit that threatened network participation, a New York pharmacy turned to Health Law Alliance for strategic l…

Jan 9, 2026
PBM Enforcement Trends Independent Pharmacies Must Prepare for in 2026
PBM Audits & Defense

PBM Enforcement Trends Independent Pharmacies Must Prepare for in 2026

Independent pharmacies are heading into 2026 under tighter PBM oversight, more aggressive audit practices, and evolving reimbursem…

Dec 16, 2025
PBM Audit Triggers: Understanding How Prescription Activity Is Evaluated
PBM Audits & Defense

PBM Audit Triggers: Understanding How Prescription Activity Is Evaluated

Pharmacy benefit managers (PBMs) increasingly use data analytics and algorithmic surveillance to identify “red flag” prescriptions…

Dec 11, 2025
Health Law Alliance Successfully Reverses OptumRx’s Network Termination for a Michigan Pharmacy
PBM Audits & Defense

Health Law Alliance Successfully Reverses OptumRx’s Network Termination for a Michigan Pharmacy

We are proud to announce that the Health Law Alliance has successfully reversed a network termination from OptumRx for a Michigan-…

Dec 7, 2025
When Inventory Discrepancies Become Audit Nightmares: Understanding One of the Most Common and Costly Audit Findings
PBM Audits & Defense

When Inventory Discrepancies Become Audit Nightmares: Understanding One of the Most Common and Costly Audit Findings

Inventory reconciliation is one of the most scrutinized areas in PBM and payer audits and even small discrepancies can trigger maj…

Nov 4, 2025
Collateral Consequences of PBM Audits: What Pharmacies Need to Know
PBM Audits & Defense

Collateral Consequences of PBM Audits: What Pharmacies Need to Know

PBM audits can quickly escalate from routine reviews into high-stakes enforcement actions with lasting financial, reputational, an…

Nov 4, 2025
Victory for an Independent Pharmacy:  Health Law Alliance Successfully Reverses Over $30,000 in PBM Inventory Discrepancy Findings
PBM Audits & Defense

Victory for an Independent Pharmacy: Health Law Alliance Successfully Reverses Over $30,000 in PBM Inventory Discrepancy Findings

Health Law Alliance successfully overturned more than $30,000 in alleged inventory discrepancy findings asserted by Express Script…

Nov 4, 2025
Navigating PBM Audits: A Legal Guide for New Pharmacy Owners
PBM Audits & Defense

Navigating PBM Audits: A Legal Guide for New Pharmacy Owners

New pharmacy owners face complex PBM audit requirements that demand strict documentation, accurate claims, and ongoing compliance.…

Oct 8, 2025
How Pharmacies Can Challenge Unfair PBM Audit Findings
PBM Audits & Defense

How Pharmacies Can Challenge Unfair PBM Audit Findings

PBM audits can leave pharmacies facing exaggerated findings, steep recoupments, and even network termination. With the right strat…

Sep 29, 2025
Top Red Flags That May Trigger a PBM Audit
PBM Audits & Defense

Top Red Flags That May Trigger a PBM Audit

PBM audits can be disruptive, costly, and often triggered by high prescription volumes, dispensing irregularities, or claim activi…

Sep 30, 2025
DME Supplier Defense Attorneys' Guide to the Different Types of Government Audits
DME Audit Defense

DME Supplier Defense Attorneys' Guide to the Different Types of Government Audits

For DME suppliers, a notice from CMS can be daunting, especially when you're trying to figure out the difference between a TPE, SM…

Sep 19, 2025
More Than a Records Request: The Threat of UPIC Audits for DME Suppliers
DME Audit Defense

More Than a Records Request: The Threat of UPIC Audits for DME Suppliers

For DME suppliers, a letter from a Unified Program Integrity Contractor (UPIC) is not a routine records request; it's a high-stake…

Oct 13, 2025
Building an Audit-Proof Documentation System for Your DME Supplier Business
DME Audit Defense

Building an Audit-Proof Documentation System for Your DME Supplier Business

In a CMS audit, your documentation is your only defense. A missing signature or an incomplete progress note can lead to a costly o…

Sep 11, 2025
By Appointment Only: How DME Suppliers Can Prevent Unexpected DME License Revocations
DME Audit Defense

By Appointment Only: How DME Suppliers Can Prevent Unexpected DME License Revocations

DME suppliers can prevent unexpected and costly license revocations by strategically applying with a "By Appointment Only" designa…

Aug 19, 2025
Resolving Prescription “Red Flags” Is No Longer Optional: Federal Scrutiny Tightens on Controlled-Substance Dispensing
DEA Investigations

Resolving Prescription “Red Flags” Is No Longer Optional: Federal Scrutiny Tightens on Controlled-Substance Dispensing

Pharmacists must resolve “red flags” under the Controlled Substances Act’s corresponding-responsibility requirements before dispen…

Aug 15, 2025
Collateral Consequences Mount Quickly After Adverse DEA Inspection
DEA Investigations

Collateral Consequences Mount Quickly After Adverse DEA Inspection

Adverse findings during a DEA inspection can trigger a chain reaction of serious consequences for pharmacies, including increasing…

Aug 13, 2025
Heath Law Alliance Secures Reversal of a Medicaid Payment Suspension
PBM Audits & Defense

Heath Law Alliance Secures Reversal of a Medicaid Payment Suspension

Health Law Alliance successfully secured a full reversal of a Medi-Cal payment suspension for a California pharmacy, overturning s…

Aug 13, 2025
How DME Suppliers Can Maintain Compliance with Medicare Enrollment Requirements
DME Audit Defense

How DME Suppliers Can Maintain Compliance with Medicare Enrollment Requirements

If you are a Durable Medical Equipment (DME) supplier and you are fearful of being scrutinized by CMS or the National Provider Enr…

Jul 24, 2025
HLA Attorney Anthony Mahajan Secures Major Victory Over Cardinal as Federal Court Dismisses Lawsuit Against Independent Pharmacies
Healthcare Fraud Defense

HLA Attorney Anthony Mahajan Secures Major Victory Over Cardinal as Federal Court Dismisses Lawsuit Against Independent Pharmacies

Health Law Alliance secured a major win for independent pharmacies with the dismissal of Cardinal Health’s lawsuit, exposing it as…

Jul 14, 2025
Health Law Alliance Earns Reinstatement for DME Supplier Whose Medicare Billing Privileges Were Unjustly Revoked
DME Audit Defense

Health Law Alliance Earns Reinstatement for DME Supplier Whose Medicare Billing Privileges Were Unjustly Revoked

Due to Health Law Alliance’s advocacy, a prominent DME vendor in Texas had their billing privileges reinstated this week, without…

Jun 16, 2025
DEA Registration Requirements for Healthcare Providers: How to Stay Compliant
DEA Investigations

DEA Registration Requirements for Healthcare Providers: How to Stay Compliant

Understanding DEA registration requirements is crucial for healthcare providers handling controlled substances. Compliance with st…

May 12, 2025
Should You Voluntarily Surrender Your DEA Registration? What Healthcare Professionals Need to Know
DEA Investigations

Should You Voluntarily Surrender Your DEA Registration? What Healthcare Professionals Need to Know

Considering voluntarily surrendering your DEA registration? Our experts can help you navigate the process and understand your opti…

May 7, 2025
PBM Audit Alert: Express Scripts Targeting Pharmacies for "Claim Phishing"
PBM Audits & Defense

PBM Audit Alert: Express Scripts Targeting Pharmacies for "Claim Phishing"

Express Scripts is using aggressive audits and investigations to recoup the dollar value of test claims that were never paid. Don'…

Feb 14, 2025
A Step-by-Step Guide to Securing (and Keeping) Your DEA Registration
DEA Investigations

A Step-by-Step Guide to Securing (and Keeping) Your DEA Registration

Learn how to obtain and protect your DEA registration with our step-by-step guide, updated for 2025 telehealth rules and audit tre…

Feb 12, 2025
How PBMs Profited from the Opioid Crisis: The Hidden Deals Fueling Addiction
PBM Audits & Defense

How PBMs Profited from the Opioid Crisis: The Hidden Deals Fueling Addiction

Pharmacy Benefit Managers prioritized profits over safety, accepting rebates from opioid manufacturers and enabling unrestricted a…

Jan 23, 2025
DEA Inspections Overview: What to Expect and How to Prepare for a DEA Inspection
DEA Investigations

DEA Inspections Overview: What to Expect and How to Prepare for a DEA Inspection

Learn what to expect during DEA inspections and how to protect your practice with proactive preparation strategies.

Dec 13, 2024
Pennsylvania Board Closes Investigation of HLA Client with No Action
Telehealth Law

Pennsylvania Board Closes Investigation of HLA Client with No Action

Telemedicine business models may prompt regulatory scrutiny, including board investigations. In this case, HLA's experienced defen…

Feb 12, 2024
Triumph Over Optum: HLA’s Tenacious Advocacy Reverses Optum’s Termination of a Texas Pharmacy
PBM Audits & Defense

Triumph Over Optum: HLA’s Tenacious Advocacy Reverses Optum’s Termination of a Texas Pharmacy

Health Law Alliance successfully reversed Optum’s termination of a Texas pharmacy from its network, protecting the pharmacy from s…

Aug 15, 2024
U.S. Justice Department Investigates Alleged Medicare Fraud Involving COVID-19 Test Kits
Healthcare Fraud Defense

U.S. Justice Department Investigates Alleged Medicare Fraud Involving COVID-19 Test Kits

The U.S. Justice Department is investigating allegations of Medicare fraud, where senior citizens' ID numbers were used to order u…

Aug 29, 2024
HLA Convinces Optum to Reverse PBM Audit Termination
PBM Audits & Defense

HLA Convinces Optum to Reverse PBM Audit Termination

Health Law Alliance is pleased to announce that Optum recently agreed to reverse its network termination of a Texas pharmacy clien…

Aug 15, 2024
Victories Against Optum Rx: Protecting Pharmacy Clients Nationwide
PBM Audits & Defense

Victories Against Optum Rx: Protecting Pharmacy Clients Nationwide

Health Law Alliance has successfully challenged Optum Rx's termination decisions for numerous pharmacies, ensuring they can contin…

Jul 15, 2024
OTC Enforcement Update and PBM Audit Alert
PBM Audits & Defense

OTC Enforcement Update and PBM Audit Alert

On the heels of federal criminal investigations into OTC card usage, payors are now auditing OTC processes and imposing severe san…

Apr 10, 2024
Safeguarding Independents: HLA Reverses PBM Termination on Appeal
PBM Audits & Defense

Safeguarding Independents: HLA Reverses PBM Termination on Appeal

PBMs are huge companies that often use their market power in an abusive and predatory manner. This case study and successful netwo…

Mar 16, 2024
National Audit Services are No Replacement for Attorney Advice
PBM Audits & Defense

National Audit Services are No Replacement for Attorney Advice

National audit assistance services cannot provide the legal expertise, subject matter knowledge, or audit leverage that healthcare…

Feb 27, 2024
Federal Prosecutors Decline Criminal Prosecution of HLA Client
PBM Audits & Defense

Federal Prosecutors Decline Criminal Prosecution of HLA Client

Following a PBM audit that uncovered a $6.5 million billing discrepancy, federal prosecutors opened an investigation. After HLA wa…

Jan 25, 2024
State Board Declines Case Against HLA Client
PBM Audits & Defense

State Board Declines Case Against HLA Client

PBM audits may result in collateral consequences, including licensing and disciplinary proceedings. In this case, HLA's experience…

Feb 12, 2024
Introduction to Medicare Audits
Payor Disputes

Introduction to Medicare Audits

The federal government (HHS-OIG) is prioritizing audits of pharmacy claims in 2024. This signals that increased enforcement action…

Jan 28, 2024
HLA Wins Network Reinstatement for Illinois Pharmacy
PBM Audits & Defense

HLA Wins Network Reinstatement for Illinois Pharmacy

PBMs are increasingly terminating pharmacies for minor infractions of the provider manuals or network enrollment forms. These term…

Jan 16, 2024