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Madison M. Castle

Associate

[email protected]

+1.202.434.7309

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Madison’s practice focuses on health care regulatory, transactional, and compliance matters. She represents clients across the health care sector, including providers, health insurance plans, PBMs, pharmacies, and health care technology firms. She has experience advising clients on Medicare and Medicaid coverage requirements, as well as state regulatory compliance regarding privacy and telehealth. She also regularly handles due diligence for health care transactions, conducts licensure analyses, and  drafts contracts for PBMs and other health care sector clients. 

In attending George Washington University School of Law, Madison earned a JD with a concentration in Health Law, served as a student attorney at GW Law’s Health Rights Law Clinic and an Administrative Law teaching assistant. She also interned with the National Health Law Program (NHeLP), where she researched state Medicaid program requirements, the Affordable Care Act and related case law. During her time at NHeLP she also prepared a legal memorandum analyzing nonprofit hospitals' charity care spending. 

Madison enjoys sailing, reading fiction, and spending time with her dog Betty in her free time. 

viewpoints

CMS’s ACA Marketplace Integrity and Affordability Proposed Rule – What It Could Mean for Health Plans

March 24, 2025 | Blog | By Lauren Moldawer, Xavier Hardy, Stephnie John, Madison Castle

Earlier this month, the Centers for Medicare & Medicaid Services (CMS) released its 2025 Marketplace Integrity and Affordability Proposed Rule (Proposed Rule), proposing a number of enrollment and eligibility policies impacting both Federal and State Exchanges. While CMS frames these policies as necessary to combat fraud and abuse, the impact will be a reduction in enrollment in the ACA Marketplace – with the Proposed Rule estimating that between 750,000 and 2 million fewer individuals enroll in health insurance plans on the Exchanges in 2026. 

This blog outlines the major provisions of the Proposed Rule, followed by a discussion of their potential impact on plans participating in the ACA Marketplace.

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Read about clarification from CMS for Part D Sponsors implementing the IRA’s Medicare Prescription Payment Plan and Medicare Prescription Drug Inflation Rebate Program policies that took effect on January 1, 2025.

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Mintz IRA Update — Fourth Edition: Q1 2025

February 13, 2025 | Article | By Rachel A. Alexander, Theresa Carnegie, Tara E. Dwyer, Lauren Moldawer, Hassan Shaikh, Stephnie John, Madison Castle, Mitchell Clough, Xavier Hardy, Samantha Hawkins, Alexander Hecht, Abdie Santiago

Mintz’s Pharmacy Benefits and PBM Contracting Practice is pleased to present the ‘Fourth Edition: Q1 2025’ of our Mintz IRA Update, a regular publication that delves into developments of the Inflation Reduction Act of 2022 (IRA) and their impact on pharmaceutical supply chain stakeholders.

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PBM Policy and Legislative Update — Winter 2025

February 10, 2025 | Blog | By Theresa Carnegie, Tara E. Dwyer, Rachel A. Alexander, Lauren Moldawer, Bridgette Keller, Priyanka Amirneni, Madison Castle, David Gilboa, Xavier Hardy, Samantha Hawkins, Stephnie John, Alison H. Peters, Pamela Polevoy, Abdie Santiago, Hassan Shaikh, Sophia Temis

The PBM Policy and Legislative Update — Winter 2025 edition builds upon prior PBM Policy and Legislative Updates and summarizes activity from October through December (2024) that affects the PBM industry. It highlights (i) federal activities, (ii) state activities, and (iii) other noteworthy events and trends affecting the PBM industry.

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PBM Policy and Legislative Update — Fall 2024

November 22, 2024 | Blog | By Rachel A. Alexander, Tara E. Dwyer, Theresa Carnegie, Bridgette Keller, Madison Castle, David Gilboa, Xavier Hardy, Samantha Hawkins, Stephnie John, Lauren Moldawer, Alison H. Peters, Abdie Santiago, Hassan Shaikh, Sophia Temis

Building upon prior issues and summarizing activity from July through September, the Fall 2024 PBM Update highlights federal legislative activity and oversight, state legislative activity and oversight, and other noteworthy events and trends affecting the PBM industry.

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Last week, Texas Attorney General Ken Paxton filed a complaint in federal district court against HHS and the Office for Civil Rights (OCR) challenging a recently issued rule strengthening protection of protected health information (PHI) related to reproductive health. As summarized in a previous post, the HIPAA Privacy Rule to Support Reproductive Health Care Privacy (Final Rule), generally prohibits disclosure or use of PHI by a covered entity or their business associate for purposes of criminal, civil, or administrative investigations into persons for seeking, obtaining, providing, or facilitating reproductive health care under lawful circumstances. In its complaint, Texas argues that the Final Rule is unlawful and seeks to have it vacated.

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CMS 2026 IRA Price Negotiations Results Likely to Create Upstream and Downstream Effects

August 20, 2024 | Blog | By Rachel A. Alexander, Theresa Carnegie, Xavier Hardy, Alison H. Peters, Madison Castle

On August 15, 2024, CMS announced the results of the first round of the negotiated prices between CMS and participating drug manufacturers for the 10 selected drugs under the Inflation Reduction Act’s (IRA) Medicare Drug Price Negotiation Program (MPN or Program). In all, reactions to the MPN results varied: Reuters reported that executives from four of the manufacturers selected in the first round of negotiations stated that they do not expect the negotiated prices to significantly impact their businesses; meanwhile, in its press release announcing the maximum fair prices (MFPs), CMS touted an estimated $1.5 billion in Medicare prescription drug out-of-pocket cost savings for Medicare beneficiaries when the negotiated prices go into effect in 2026. 

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PBM Policy and Legislative Update — Summer 2024

July 31, 2024 | Blog | By Theresa Carnegie, Tara E. Dwyer, Rachel A. Alexander, Bridgette Keller, Madison Castle, David Gilboa, Xavier Hardy, Samantha Hawkins, Stephnie John, Pat Ouellette, Alison H. Peters, Abdie Santiago, Hassan Shaikh, Sophia Temis

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On July 8, 2024, the Office of Inspector General (OIG) updated its General Questions on Fraud and Abuse Authorities (FAQs) related to the Anti-Kickback Statute (AKS) and the Beneficiary Inducement Prohibition of Civil Monetary Penalties Law (CMPL) with clarifications regarding waiving patients’ cost-sharing amounts pursuant to health care providers’ financial assistance policies. The new FAQs (FAQs #13-16) reiterate the OIG’s longstanding position that hospitals and other health care providers may provide financial assistance to Medicare and Medicaid beneficiaries on the basis of financial need. Of note, the OIG also provides some guidance on the distinction between marketing and advertising to patients as opposed to making patients aware about the availability of financial assistance, and this guidance may be useful in a variety of contexts beyond cost-sharing waivers. 

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Mintz IRA Update — Third Edition: Q2 2024

July 15, 2024 | Blog | By Rachel A. Alexander, Theresa Carnegie, Madison Castle, Mitchell Clough, Tara E. Dwyer, David Gilboa, Xavier Hardy, Samantha Hawkins, Stephnie John, Bridgette Keller, Lauren Moldawer, Abdie Santiago, Hassan Shaikh

In ‘Third Edition: Q2 2024’ of the Mintz IRA Update, we cover updates to the Medicare Drug Price Negotiation Program being considered by CMS, developments in litigation challenging the program, the consequences and costs of redesigning the Part D program, opposition to the use of march-in rights to lower drug prices, and the growing use of state prescription drug affordability boards.

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podcasts

Health Law Diagnosed – New Year's Gratitude

February 3, 2025 | Podcast | By Bridgette Keller, Alison H. Peters, Samantha Kingsbury, Theresa Carnegie, Joanne Hawana, Abdie Santiago, Stephnie John, Pamela Polevoy, Karen Lovitch, Jean D. Mancheno, Deborah Daccord, Rachel A. Alexander, Jane Haviland, David Gilboa, Kathryn Edgerton, Hassan Shaikh, Madison Castle, Laurence Freedman, Priyanka Amirneni, Samantha Hawkins, Tara E. Dwyer, Rachel Yount, Sophia Temis, Xavier Hardy

Host Of Counsel Bridgette Keller invites the Mintz Health Law team to reflect on what they’re grateful for as they prepare for the year ahead. Hear from a dynamic group of Members, Of Counsel, and Associates as they share their perspectives on what’s coming up over the horizon.

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As the Mintz Health Law team welcomes the beginning of 2024, many of its members take a moment to reflect on the exciting growth of the Health Law Practice, opportunities to partner with clients on complex legal issues, and the celebration of numerous milestones.

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Publications

  • Co-author, “California Health Programs Must Take Steps to Implement Non-Binary Gender Markers,” National Health Law Program (July 2022)
  • Co-author: "HIPAA happenings: 2023 year in review." Compliance Today (March 2024)
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