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our Mission

We are Building a Better Future in GI Care

At Pinnacle GI Partners – we are a unique family of practices focused on transforming gastrointestinal care in across the Midwest.

We are founded on the belief that independent GI practices provide the best value – quality, cost, and experience – for patients and their communities.

Our model is unique. We partner with entrepreneurial GI physicians who want to grow and thrive together with us.

What we are solving

Your Destiny - Take Control

Overcome Your Challenges

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    Health system consolidation and physician employment

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    Declining economics – payer pressure, wage inflation, regulatory requirements

  • Personel icon

    Administrative and leadership burden distracting from taking care of patients

Seize Your Opportunities

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    Deploy new technologies to support better care, patient accessibility and convenience

  • Growth icon

    Maximize practice growth and profitability – ancillaries, new services

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    Lower practice overhead and procurement costs through size and scale

We're building something different

We’re building a large-scale GI practice platform that can withstand these challenges and thrive. One that keeps you in the driver’s seat, leverages the benefits of scale, and preserves local control. That's why we created Pinnacle GI Partners.

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Physicians as Partners, Not Passengers

  • We are focused beyond the transaction and really on what we can do as partners.

  • We partner with best in class GI physicians committed to highly effective care and lowering healthcare costs

  • Our physicians work jointly with our business leaders to drive our business forward

  • We are not one size fits all we preserve our local practice structures to ensure continued engagement and affiliation


Invest Together to Build the GI Practice of the Future

  • Comprehensive, integrated GI care prevention to cure

  • Practice at the leading edge of patient care and research

  • Train, mentor, and develop the next generation of physicians clinical, research, leadership

  • Deploy technologies to meet 21st Century patient expectations for accessibility and convenience


Deploy Tools and Expertise to Ensure Your Continued Success

  • Expertise to execute the right strategy with hospital systems and payers

  • Operational expertise to develop new ASCs, improve practice efficiency and grow new practices and service lines

  • Marketing capabilities sustain patient growth

  • Business systems to drive administrative efficiency

Who We Are

Pinnacle GI Partners was formed in late 2020 by HIG Growth Partners and Center for Digestive Health in Troy, MI. We partnered in early 2021 with Michigan Gastroenterology and Capital Colorectal Surgeons in Lansing, MI


CDH is the premier provider of digestive health services in the greater Detroit metro with 10 Gastroenterologists, 1 GI Pathologist, and 8 Advanced Providers, 10 locations


Michigan Gastro Institute (MGI) and Capitol Colorectal Surgery (CCS) are the largest providers of GI services in Central Michigan with 11 Gastroenterologists, 3 Colorectal Surgeons, and 7 Advanced Providers


Pinnacle GI includes a pathology lab, infusion services, anesthesiology, and clinical research services

High growth icon

H.I.G. Growth Partners is part of H.I.G. Capital, which has $44 billion of assets under management. Invested in 30 platform healthcare companies. Experience, resources, and support in building a platform business

Our Leadership

James Grant, MD

Chief Executive Officer

James Grant, MD

James is the Chief Executive Officer for Pinnacle GI Partners. James previously led the US Healthcare Industry Value Creation team at Partners Group, a global private equity firm, where he worked with private healthcare companies to drive M&A, organic growth and operational improvement strategies.

Prior to his role at Pinnacle GI Partners, James was the Division President for Ophthalmology at EyeCare Partners, a private equity-backed PPM, where he was responsible for M&A, growth, and operations comprising 25 Ophthalmology practices and 20 ASCs across 12 states.

James draws from an extensive background in healthcare - middle market private equity, ASC operations at Surgical Care Affiliates / Optum, The Boston Consulting Group strategy consulting, and M&A and post-merger integration across healthcare services, medical devices and pharma.

James received his MD, MBA, and BSE in Biomedical Engineering from Duke University where he was a Fulbright Scholar.

Partha S. Nandi, MD, FACP

PArtha Nandi, MD, FACP

Chief Medical Officer and Managing Partner, Troy Gastro

Dr. Nandi is the Chief Medical Officer of Pinnacle GI Partners and Managing Partner of the Troy Gastroenterology Division.  Dr. Nandi works closely with the Pinnacle GI leadership team and leads our physician committees that support our “dyad” business and clinical partnership model.  Dr. Nandi is a Director on the Pinnacle GI Partners corporate board of directors. 

Dr. Nandi is a practicing gastroenterologist in the Troy Gastroenterology practice where he has a special interest in therapeutic endoscopy and endoscopic ultrasound. Dr. Nandi is American Board of Internal Medicine certified in Gastroenterology and Internal Medicine. He is a member of the American Medical Association, the American College of Gastroenterology, the American Gastroenterology Association and the American Society of Gastroenterological Endoscopy. He performed his undergraduate studies at Ohio State University, where he graduated summa cum laude. He obtained his medical degree at Wayne State University, where he graduated with distinction, and completed his Internal Medicine residency at Wayne State University. He completed his fellowship in Gastroenterology at the University of Michigan. Dr. Nandi also serves on the board of United Physicians and is the Chief Health Editor of WXYZ ABC Detroit.

Scott Plaehn, DO

Scott Plaehn, DO

Managing Partner, Michigan Gastroenterology

Dr. Scott Plaehn is the Managing Partner of Michigan Gastroenterology in Lansing, Michigan.  Dr. Plaehn works closely with the Pinnacle GI Partners Leadership team.  Dr. Plaehn is a Board Observer on the Pinnacle GI Partners corporate board. Dr. Plaehn is a practicing gastroenterologist in Lansing.  He is a medical graduate from the Chicago College of Osteopathic Medicine in Illinois.  He performed his Internship and Residency at Metropolitan Hospital in Grand Rapids, Michigan an affiliate of Michigan State University.  He then went on to Botsford General Hospital in Farmington Hills, Michigan where he completed his Fellowship in Gastroenterology.  Dr. Plaehn is board certified in both Internal Medicine and Gastroenterology.  He has been practicing in the Lansing area since 1996.

Shaman Bakshi

Shaman Bakshi

Chief Financial Officer

Shaman Bakshi has an extensive career in structured finance spanning more than 20 years. Mr. Bakshi has served as senior managing director at General Electric Capital Corporation, a leading financial institution in several business sectors with an expertise in Private Equity and Corporate Finance. Mr. Bakshi began his career as an internal auditor for General Electric. For over five years in this role he was able to drive cost out of billion dollar businesses within the GE portfolio to the tune of $750 million and increased operating efficiency twelve fold. For the last fourteen years he has structured equity and senior/mezzanine debt for Private Equity Sponsors, Manufacturing, Retail, Gaming, Healthcare, Tech & Media, and Real Estate industries. He is a master at developing and executing corporate finance strategies to minimize the cost of funds and maximize the return on invested capital. Mr. Bakshi graduated with an MBA in Finance from the Anderson School of Business at UCLA with Highest Distinction and Summa Cum Laude with an undergraduate degree in Finance and Accounting from the University of Texas at Austin

Alison Rogers, CPA

Corporate Controller

Alison has an extensive background in the Accounting field with almost 20 years of experience that has afforded her a wide breadth of financial knowledge technically across a variety of industries and organizational structure types. Alison has been concretely focused in the healthcare industry for the past 10+ years with most notable roles as Sr. Revenue Accountant for Great Expressions Dental Centers, a middle-market private equity backed DSO, and Supply Chain Management Finance Manager at Trinity Health, a multi-billion dollar revenue not-for-profit healthcare system, along with additional analytical, internal audit, financial reporting, and management positions for a variety of other small to medium size organizations, many of which were focused on high growth business models during her tenure. Alison received her Bachelor of Arts and Masters of Science in Accounting from Michigan State University.  She also achieved her CPA license while beginning her career at public accounting firm Plante & Moran, PLLC.

Alison lives in Wixom, MI with her husband Jerry and 4 teenage sons on a small inland lake where they enjoy boating together as a family during the beautiful Michigan summers.  Alison also is a passionate supporter of all her boys’ sports, spending lots of her free time especially in the soccer & wrestling stands, along with following around at many local golf courses cheering each of them on in their respective favorite activity.

Mary Michalek

Director of Revenue

Mary is the Director of Revenue Cycle for Pinnacle GI Partners, present since its inception in 2020. Mary previously led the Revenue Cycle Team for one of Pinnacle GI Partner’s medical groups, Center for Digestive Health, which includes Troy Gastroenterology, Michigan Infusion Center, Surgical Centers of Michigan, Anesthesia Surgical Centers of Michigan, Macomb Endoscopy Center and Anesthesia Macomb Endoscopy Center. Prior to Center for Digestive Health, Mary managed the revenue cycle teams for several midsized practices in the field of dermatology, physician medicine and rehabilitation, obstetrics and gynecology and internal medicine. Mary was the creator and the lead instructor for a medical billing curriculum at a leading, accredited allied health postsecondary educational institute. Mary holds a Certification for Physician Practice Management from the AAPC. Mary lives in Shelby Twp, MI; enjoys kayaking, hiking and flyfishing with her husband as well as her two sons.

Cheryl Troppens

Cheryl Troppens

Chief of Staff and Director of PMO

Cheryl is the Chief of Staff for Pinnacle GI Partners. Before being named the Chief of Staff, Cheryl was the Senior Manager of Finance and Administrative Services where she was responsible for the Finance and HR departments at Center for Digestive Health. Prior to joining Center for Digestive Health in 2014, she served as an Accountant for the Charter Township of Shelby, Financial Management division. Cheryl graduated from Walsh College with a Bachelor of Science in Accounting.  She also earned the Certified Medical Practice Executive certification from MGMA. Cheryl lives in Shelby Township, MI and enjoys camping, biking, and spending time with her family.

Kristie Arens

Kristie Arens

Director of Human Resources

Kristie is the Director of Human Resources for Pinnacle GI Partners, and joined the team in September 2021. Kristie previously served as the Director of Human Resources and Director of Fund Development for a large senior living community.  Her strengths are in corporate communication, labor relations, recruiting and retention, performance management, professional development, training/education, and corporate compliance/ethics.  Early in her career, Kristie worked in Human Resources for EDS, supporting General Motors in their customer service center for Chevrolet. Kristie enjoys occasional consulting work, providing human resources support for small business owners in her local community. Kristie received her Bachelor of Arts degree from Central Michigan University in Organizational Development and Human Resources. Kristie resides in White Lake, Michigan; enjoys boating and kayaking on Lake Huron; is an avid reader; and loves to travel.  She also enjoys spending time with her husband Robert and her son and daughter who are in college.  

Mark Tricolli

Managing Director

Mark is a Managing Director at H.I.G. Growth Partners and is based in its Boston office. He joined H.I.G. in 2012.

At H.I.G., Mark has led investments in healthcare companies including MedPro Advantage, Sage Hospice, Just Home HealthCare Services, and Pinnacle GI Partners.

Prior to H.I.G., Mark was a partner at Enhanced Equity Fund, a lower middle market private equity firm and JW Childs, where he served on the boards of Sheridan Healthcare, Equinox Fitness, and CHG Healthcare. Mark began his private equity career at William Blair Capital Partners and Goldman Sachs, and prior, worked in the healthcare group of Chemical Securities, Inc.

Mark received his Bachelor of Arts from Cornell University and an MBA from The Wharton School of the University of Pennsylvania.

Angela Johnson

Executive Director, Troy Gastro

Angela is Executive Director for the Troy division of Pinnacle GI Partners Angela joined Troy Gastroenterology in 2006 and was quickly placed in management to oversee several projects - managing building construction, developing the structure of multiple GI Ambulatory Surgical Centers, and ensuring that all policies and paperwork were current and complete. This resulted in a rare perfect score from AAAHC Accreditation which distinguishes ambulatory centers from many other outpatient facilities by providing the highest quality of care to its patients as determined by an independent external evaluation process. She is a Registered Nurse with 40 years in healthcare who has overseen medical teams in both the hospital and office settings. In 2011, she became the Chief Operating Officer and was influential in the formation of Pinnacle GI Partners in November 2020. She enjoys getting to know the employees, evaluating their skills and interests, and directing and empowering them to create better service. Angela married her childhood sweetheart, and they have been married for almost 40 years. They enjoy traveling, especially to Nashville, TN, where their two children and two grandchildren live.

Daniel Badgley

Daniel Badgley

Executive Director, Digestive Health Institute

Daniel is the Executive Director, Pinnacle GI Partners - Lansing Division. Prior to the formation of Pinnacle GI Partners, Daniel was the CEO of the Digestive Health Institute, which became part of Pinnacle in January 2021. 

Previously, Daniel was the Executive Director of LO Eye Care (Lansing Ophthalmology), a large private regional eye care practice.

Daniel began his healthcare career at the Henry Ford Health System, where he gained experience in hospital operations as well as experience running Ophthalmology, Urology and Anesthesiology specialty services over a 25 year span.

Daniel received his BSA from the University of Michigan, and his MBA from Wayne State University.

Daniel lives in Brooklyn, Michigan where he enjoys all aspects of lake life with his wife, Judy. He also enjoys activities with their children and grandchildren.