A leader in ophthalmic ambulatory surgery center consulting, accreditation, value-added services, and management.

About Us

We specialize in providing expert support to ophthalmic surgery centers.

American SurgiSite Centers

Since 1987, American SurgiSite Centers (ASC) has specialized in providing expert support to ophthalmic surgery centers.        

As specialists serving the US ophthalmic ambulatory surgery center community, ASC continues to be involved in all facets of your business—consulting, accreditation, value-added services (including EMR and benchmarking), and overall surgery center management.       

At ASC, we can help you to improve outcomes in all aspects of your ophthalmic ambulatory surgery.   

When you operate an ophthalmic ambulatory surgery center, you need to provide the best care at the right price. If you share our commitment to exceptional patient care and profitable business results, contact American SurgiSite Centers. 

Contact ASC to get started!

Our Team

Our accomplished and experienced management team brings a breadth of expertise to each project based on years of experience in the ambulatory surgery center industry. 

Glenn A. deBrueys, Chief Executive Officer

Glenn deBrueys is one of the founding partners of American SurgiSite Centers, Inc. (ASC), which has been developing, building, and managing out-patient surgical facilities since the company was founded in 1987. In 1998, ASC was sold to a public company, Vision Twenty-One, where he served as President of the ambulatory surgery center division. In 2001, Mr. deBrueys purchased the company back and has since expanded, opening multiple free-standing surgical facilities in the northeast. Prior to founding American SurgiSite Centers, he served as Regional Sales Manager for Allergan and was Sales Manager for American V. Mueller, a Division of American Hospital Supply Corporation. Mr. deBrueys is involved in numerous charitable organizations such as New York City Relief, an organization feeding the homeless in NYC and NJ, where he served as chairman, while the founder was on sabbatical. Mr. deBrueys received his Bachelor of Science degree from Gardner-Webb College in NC. Mr. deBrueys also serves as Chief Executive Officer of the Vision Center Network of America, (VCNA).

Christopher M. Arunkumar, Chief Financial Officer/Acting COO

Christopher M. Arunkumar joined American SurgiSite Centers in 2021 with over 30 years of experience in the accounting field. His background in public accounting, auditing, taxation, SOX (Sarbanes-Oxley) and fraud investigation makes him a great fit for his role. His core values are trouble shooting and improving processes.

"Failure is not an option" – Gene Kranz


Maria Tietjen, RN, BSN, CSPD, CAIP, Executive VP, Nursing & Clinical Services, Executive Director, Surgery Center Regulatory Compliance Protocols 

Maria Tietjen has over 35 years of experience in the field of nursing and management in the clinical setting. Ms. Tietjen’s experience extends across direct patient care, administration, and sales. Ms. Tietjen is the Executive VP of Nursing and Clinical Services for the ASC's. She is responsible for overseeing all the nursing and clinical managerial aspects, regulatory and compliance, Infection Control, and all areas of patient care. In the past, she held the position of charge nurse for the orthopedic department of a 16-room operating suite in northern New Jersey. She directed the nursing staff and was responsible for the equipment, implants, and training of the personnel. From 1988 on she has been working in the field of Outpatient Ophthalmic Ambulatory Surgery Centers. Ms. Tietjen has been published in magazines and lectures at ASCRS and AAO meetings.

Gail Skillman, Treasury Management/Human Resources

Gail graduated with an Associates Degree in Accounting from Middlesex County College and graduated with Bachelor’s Degree in Economics from Rutgers University. She has had accounting jobs in various industries such as Construction and Real Estate. Joined American Surgisite Centers in Treasury Management position in 2002.


Katie Negron, Purchasing Manager

Katie Negron has 24 years of purchasing experience and management. She joined ASC in 2012 and is responsible for overseeing the purchases for all facilities, working closely with the on-site materials managers and purchasing clerk Barbara Petrie, who has worked at ASC for over 20 years. Katie's experience in logistics, invoicing, sales, marketing, shipping, service level, buying analysis and inventory management have given her the solid background to help make ASC purchasing a successful part of the management team.

Lizette Petersen, Billing Manager

Lizette Petersen CPB, COPC  has over 18 years  of experience in the healthcare industry. She has experience in billing, coding, management and medical assisting. Mrs. Petersen joined American SurgiSite Centers in 2012 and is responsible for overseeing all billing operations. She received her degree in Medical Administration from The Chubb Institute. In addition, she is a member of American Academy of Professional Coders (AAPC)and is certified as a Certified Professional Biller (CPB) and Certified Ophthalmology Coder (COPC). 

Your health is our top priority. All facilities follow recommended procedures and protocols to prevent the spread of the Covid-19 virus.

Close Menu