Mark Taber

Executive Committee, Investment Committee, Managing Director at Great Hill Partners

📍 Boston, Massachusetts, United States🔄 Updated September 2026💼 20 investments📅 23 years investing🗓 Last invested Aug 2025
VC🌍 United States20+ investments
20
Total investments
0
Early stage
0
Mid stage
5
Late stage
23y
Years active

Portfolio

10 investments · sorted by recency
All investments
Early stage
Mid stage
Late stage
Board Member
Nov 2024
We are the pioneers of the combined emergency room and urgent care experience. We began in 2008 and now serve over 500k patients annually as a joint-venture partner with health systems coast to coast. Health systems across the country continue to partner with Intuitive Health because of our proven retail model and implementation expertise. Intuitive Health is now partnered with 16 hospital systems nationwide with 29 combined ER and Urgent Care facilities open across the country, with even more opening in 2024 and beyond. We bring a globally recognized customer service model to health systems that want to exceed expectations in their communities and grow market share with the only dual model full-service Emergency Room and Urgent Care offering the right care, at the right price, close to home.
Board Member
Sep 2021
IVX Health is a leading provider of infusion and injection therapy for those with complex chronic conditions such as rheumatoid arthritis, Crohn’s disease, multiple sclerosis and other conditions. IVX Health centers are conveniently located in the communities where patients live and offer flexible scheduling, including evenings and weekends. Patients relax in their own private suite, equipped with high-speed Wi-Fi, a flat screen TV, and comfortable recliners with room for guests.
Board Member
Jul 2021
For 20 years, LaborFirst has been the leading healthcare navigation and advocacy provider, dedicated to supporting labor benefits plans and their members. Our personalized service model drives cost efficiencies while improving member engagement, satisfaction, and outcomes. No organization serves the unique needs of Labor like LaborFirst.
Board Member
Aug 2019
ParetoHealth is the largest health benefits captive in the country, with over $1.2B in stop-loss premium under management, and over 2300 participating employers and 780,000 covered lives. Our turnkey employee health benefit solution offers groundbreaking innovations in self-insurance with multi-year protection. With the purchasing power of a Fortune 500 company, we help small and medium-sized businesses take control of their healthcare spending and reduce risk. ParetoHealth is pulling an industry out of its past and into a future with more predictability, transparency, control, and actionable insights.
late stageInsurance
Board Member
Mar 2018
Introducing the next generation of risk adjustment and quality of care Vatica Health offers a unique model that pairs expert clinical teams with cutting-edge technology at the point of care. By capturing more accurate and complete diagnosis codes, our solution helps improve revenue and reduce the risk associated with an audit. Learn more about how we help health plans, providers, and patients achieve better outcomes, together. Working at Vatica Health: We are seeking smart, hands-on, driven, collaborative team players with a thirst for learning and innovating. We leverage state-of-the-art technology to communicate, collaborate and get work done - fast. If you have an entrepreneurial spirit and a passion for producing amazing work that measurably impacts our industry, we want to talk with you. Connect with Vatica Health on Twitter @VaticaHealth. Specialties: Risk Adjustment, Value-based Care, Clinical and Quality Outcomes, Claims and Payment Integrity, Healthcare Data insights, Quality Improvement, Risk core Accuracy, Annual Wellness Visit, Medicare, CMS Star Ratings, NCQA, HEDIS, QRS, ICD-10
Board Member
Jul 2014
Celebrating 25 years, Qualifacts is the leading provider of electronic health record (EHR) software and data solutions designed specifically for behavioral health and human services organizations. Putting the health of individuals first, our award-winning platforms—Credible, CareLogic, and InSync—enable behavioral health providers to spend more time on what matters most: delivering superior care that drives better outcomes. Qualifacts is more than a provider of innovative technology—were partners in care, working alongside organizations of all sizes nationwide to simplify the lives of behavioral health providers and provide care with the greatest need. We simplify clinical workflows and ensure compliance, while strengthening client-provider relationships. Today, we serve more than 2,700 organizations across all 50 states, including 33% of the nations Certified Community Behavioral Health Centers (CCBHCs).
Board Member
Jul 2010
Sterilmed, a part of the Johnson & Johnson Family, provides an affordable solution for hospitals faced with the challenge of reducing costs without compromising patient care. We are proud to be a part of keeping healthcare accessible and affordable for all by delivering deep, sustained savings for our reprocessing customers.
Board Member
2009
Excel Academy was founded in 2003 with the mission to provide a high-quality education to students in East Boston and Chelsea Massachusetts, communities that are predominantly low-income and Latinx and historically have faced significant social and educational barriers. Our success in Massachusetts is proof that the opportunity gap can be closed. At Excel Academy Charter Schools, we believe that when a student has the support and tools to pursue a productive post-secondary pathway aligned to their personal identity and values, it can fundamentally change their life trajectory. Over the years, we have grown from one middle school to a network of four schools with 1,400 students in grades 5 to 12. In the fall of 2022 we will welcome a founding class of 5th graders to help us launch Excel Academy Rhode Island. By 2032, Excel Rhode Island will run 4 schools serving over 2,100 students from Providence, Central Falls, and North Providence. We present our students with educational experiences that allow them to grow and discover their best selves so that when they leave our halls, they can successfully navigate all of the post-secondary options available to them. At Excel Academy we learn from our students, families, and staff and make improvements. We have increasingly adapted to provide a holistic education that values our community as collaborators in the learning process, social-emotional support, equity for diverse learners, and fosters identity development. We prioritize an approach that is both rigorous and inclusive. Our team of passionate, intelligent, driven, and loving staff are at the core of the work we do. Growth Happens Here.
Board Member
Aug 2008
At Global Payments (NYSE : GPN), we empower simple, fast, secure payments for everyone. And to do that, we’ve built a complete, worldwide commerce ecosystem that delivers software and services at scale to millions of companies around the world—from ambitious startups to global enterprises. Our team of 27,000 experts is dedicated to your success. Headquartered in Atlanta, Georgia, were a Fortune 500® company and a member of the S&P 500 with worldwide reach spanning North America, Europe, Asia Pacific and Latin America. Wherever you are—or wherever you want to be—we’re there, ready to support you. For more information, visit company.globalpayments.com and follow Global Payments on X , LinkedIn and Facebook.
Board Member
Dec 2003
Fiserv, Inc. (NASDAQ: FISV) is a global technology leader committed to delivering innovative and transformative financial services experiences for clients in more than 100 countries.
Experience · 22 entries
All (22)
Investments (20)
Board (20)
2025
Board Member
Aug 2025
At Blue Cloud, our mission is expanding access to safe and affordable restorative dentistry and oral surgery. All procedures are done under general anesthesia, with a focus on children and special needs patients. This has led to us becoming both the largest and fastest growing pediatric ambulatory surgery center company nationwide with 26 surgery centers across 9 states.
2024
Board Member
Nov 2024
We are the pioneers of the combined emergency room and urgent care experience. We began in 2008 and now serve over 500k patients annually as a joint-venture partner with health systems coast to coast. Health systems across the country continue to partner with Intuitive Health because of our proven retail model and implementation expertise. Intuitive Health is now partnered with 16 hospital systems nationwide with 29 combined ER and Urgent Care facilities open across the country, with even more opening in 2024 and beyond. We bring a globally recognized customer service model to health systems that want to exceed expectations in their communities and grow market share with the only dual model full-service Emergency Room and Urgent Care offering the right care, at the right price, close to home.
2021
Board Member
Oct 2021
Clearwave is the healthcare industry’s most comprehensive patient revenue platform. Listed as one of Technology Association of Georgias Top 40 Innovative Companies and a finalist for the 2020 TripleTree iAwards, Clearwaves technology has empowered specialty practices and health systems to improve profitability, productivity and patient access since 2004. Healthcare organizations choose Clearwave for its ability to simplify patient scheduling, expedite patient intake, automate insurance eligibility verification and create true financial transparency for both patient and practice. Clearwave helps practices accelerate cash flow and improve digital patient access. For more information, visit www.clearwaveinc.com. We aim to make the lives of specialty medical practices and health systems simpler, allowing them to focus on what truly matters – patient care.
Board Member
Sep 2021
IVX Health is a leading provider of infusion and injection therapy for those with complex chronic conditions such as rheumatoid arthritis, Crohn’s disease, multiple sclerosis and other conditions. IVX Health centers are conveniently located in the communities where patients live and offer flexible scheduling, including evenings and weekends. Patients relax in their own private suite, equipped with high-speed Wi-Fi, a flat screen TV, and comfortable recliners with room for guests.
Board Member
Jul 2021
Labor First is now LaborFirst, a division of RetireeFirst! Building on decades of growth and innovation, our new rebrand further underscores our mission of serving the needs of group plan sponsors and their retirees by simplifying the complex benefits landscape. Learn more by following us on our new page.
Show all 22 entries ↓
Investment activity
2003–2025 · 20 investments
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