Ascertain Systems, Inc.

About Ascertain

Ascertain helps healthcare organizations complete paperwork and other administrative work so staff can spend more time with patients. Its artificial intelligence agents are software tools that carry out multistep tasks across existing systems. They handle prior authorizations, referrals, and eligibility checks, as well as broader care-management and billing work. The platform reads data that is not organized into fixed fields, completes forms, and communicates results.

Ascertain is based in New York City. Mark Michalski, M.D., is chief executive officer, and Carlos Dedesma is director of operations and finance. The company works with specialty practices, management service organizations, health systems, and health plans. The platform supports cardiology, oncology, orthopedics, and behavioral health teams. It spans both care-management and revenue-cycle operations.

Funding Rounds (SEC Form D)

First sale is the date the first investor in the offering committed to invest. Companies must file Form D within 15 days of that date, so filing dates run later.

What the SEC Filings Show

• Courtney Marcin first appears as a director on the Form D that Ascertain filed on October 20, 2026. [7]
• Julian Harris of Deerfield Management, which led the Series A round, first appears as a director on the Form D that Ascertain filed on October 20, 2026. [7][4]
• Ari Shamiss first appears as a director on the Form D that Ascertain filed on October 20, 2026. [7]
• Series A began taking money on April 11, 2025, 11 days before the announcement. The Form D filed on April 25, 2025 shows $10.0 million sold, the full offering, from 3 investors, or about $3.3 million each. [12]
• Konstantine Costalas was last listed as a director on the Form D that Ascertain filed on April 25, 2025. [12]
  Form D filings that name Konstantine Costalas (3):

  • Ascertain, director: Mar 28, 2024 · Apr 25, 2025
  • Digital Transformation TopCo, director: Mar 28, 2024

Who Invested in Ascertain

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Announced amounts can differ from Form D figures: an announcement can combine several closings, and some money is raised without a Form D.

Why Investors Backed Ascertain

One in four patients face care delays or lose access when paperwork stalls treatment. Case managers spend up to 60% of their time on manual administration, while more than 100,000 related U.S. jobs remain open, making it difficult for health systems to meet patient needs. Deerfield's case for Ascertain is that it rebuilds whole workflows, while Northwell's pilot showed staff could spend more time on patient care. [2][4]

Origin and Team

Ascertain was created in April 2022 as a company-building partnership between Aegis Ventures and Northwell Holdings. Northwell Health also helped develop the platform, while Aegis Ventures includes Ascertain in its portfolio. Northwell belongs to the 11-system Aegis Digital Consortium, which develops and scales artificial intelligence tools for healthcare's quality, cost, and equity problems. The consortium names Ascertain among those tools. [11][10][4][5]

Before Ascertain, Mark Michalski worked at Mass General Brigham and Amazon. He also worked at Butterfly Network and Hyperfine Research. [4]

Product and Technology

Ascertain runs complete administrative workflows for health systems, payers, and provider groups instead of automating isolated steps. Customers can use Ascertain Automate as enterprise software or outsource full workflows to Ascertain's staff. It handles payer-provider exchanges, missed referrals, and benefit activation. It also manages transfers between home and community care. It can deploy within weeks with little disruption to existing systems. Ascertain argues this approach can lower administrative costs and move patients into care faster. [1][5][8][10]

Workflows include medical-record requests, discharge planning, and denials management. The product also closes care gaps and includes an artificial intelligence voice agent. Ascertain includes human review and built-in traceability in every process, giving customers visibility and control over outcomes. [1]

At The Oncology Institute, prior-authorization work fell from 350 staff hours a week to under 10, and first-pass approvals exceeded 95%. The first implementation went live in eight weeks. Ascertain deployed across more than 100 clinics in under eight weeks. Post-acute submissions became 95% faster. [1][10]

A Northwell Health pilot reduced user clicks by 80% and authorization submission time by 67%. Cardiovascular Associates of America is another partner. Cardiology workflows show 95% average revenue recovered and 94% first-pass prior-authorization approval, with deployment in eight weeks or less. [1][9]

Cardiology agents use electronic health-record templates, medical guidelines, and each institution's policy library. Specialists review high-stakes steps before completion. The platform provides audit trails and one-click rollback. Patient data is separated by customer and encrypted in storage and transit. It supports HIPAA agreements, SOC 2 Type II controls, and optional U.S.-only data storage. [9]

Milestones

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Market

Northwell Health's Mark Solazzo views rising administrative work as a burden on clinicians and staff. He argues that automation can redirect their attention to patients and families. [4]

Mark Michalski argues that working with Deerfield, Northwell, and Aegis gives Ascertain access to distribution channels, workflows, and data. Backers bring operating links as well as capital. [4]

We wrote this summary from public statements by Ascertain and its investors. It is not investment advice.

Leadership Team

Executive officers and directors listed on Ascertain's Form D filed Oct 20, 2026.

Mark Michalski

Chief Executive Officer and director

LinkedIn ↗

Carlos Dedesma

Director of Operations & Finance

John Beadle

Co-founder and Managing Partner of Aegis Ventures, director

Also a director at Hume AI and Optain.

CM

Courtney Marcin

Director

Moses Adubi

Director

Julian Harris

Operating Partner Healthcare Services at Deerfield Management and director

AS

Ari Shamiss

Director

Earlier filings also listed Konstantine Costalas (director, last listed Apr 2025), Marc Berger (executive officer, last listed Mar 2024), Laurence Kraemer (executive officer, last listed Mar 2024) and Gregg Fergus (executive officer and director, last listed Mar 2024).

Largest Form D Raises Filed the Same Day

Private companies with new Form D filings accepted by the SEC on Oct 20, 2026.

Sources

1. CompanyAscertain website · linked above ↑
2. CompanyAscertain company page
3. CompanyAscertain privacy policy
4. CompanyAscertain Series A announcement
5. InvestorAegis Ventures Ascertain portfolio page
6. InvestorNorthwell Health launch page
7. SECAscertain Form D, filed 2026-10-20 · linked above ↑
8. InvestorDeerfield Ascertain portfolio page
9. CompanyAscertain cardiology page
10. CompanyAscertain New York Digital Health 100 announcement
11. PressAegis Ventures and Northwell Holdings Optain announcement
12. SECAscertain Form D, filed 2025-04-25 · linked above ↑
13. SECAscertain Form D, filed 2024-03-28 · linked above ↑
14. SECAscertain Systems, Inc. filing history