Ned Lakshmipathy, MD

Founder & Medical Director

Dr. Ned formed Pain Management Group with a vision to create a systematic, process-driven approach to developing and operating balanced, hospital-based, outpatient pain management centers.

Dr. Ned is board certified in anesthesiology and interventional pain management and completed his ACGME-accredited Fellowship in pain management and anesthesiology residency at the New England Medical Center/Tufts University School of Medicine in Boston, Mass. Dr. Ned did his internal medicine internship and residency at the Hospital of St. Raphael in New Haven, CT.

John Bookmyer

President & CEO

John joined Pain Management Group in 2009, bringing a combination of financial and strategic planning expertise as well as more than 20 years of experience in hospital administration and healthcare consulting. John has led PMG’s growth by developing partnerships with physicians and hospital administration to expand hospital offerings, facilities, and service lines.

John is a graduate of Bowling Green State University where he earned his BS in Accounting and received his MBA from The University of Findlay.

Christina Tulenko, MD, JD

VP of Medical Services & CMO

Christina Tulenko, MD, JD joined Pain Management Group in July of 2016.

Dr. Tulenko utilizes her vast skill sets to provide quality clinical and policy insight for Pain Management Group and their partner programs. She completed dual residencies at Indiana University in the fields of Internal Medicine and Pediatrics. Dr. Tulenko’s experience includes serving as Medical Director of Emergency Services at Marion General Hospital and as a consulting practice attorney for medical malpractice issues with Wolske and Blue, LPA in Columbus, Ohio.

Dr. Tulenko received both her medical and legal degrees from The Ohio State University.

Brad Hecker

VP of Finance & CFO

Brad joined Pain Management Group in 2010. He oversees PMG’s financial management business process. Brad has more than 19 years of healthcare industry experience in financial management and operations.

Prior to joining Pain Management Group, Brad was Director of Joint Venture and Performance Management and Director of Finance Operations at OhioHealth.

Brad earned his MBA from Kent State University and his BBA from The Ohio State University.

Jeff Leimgruber

VP of Operations & COO

Jeff joined PMG in April 2017 to lead corporate and business operations. Jeff is a Fellow of the American College of Healthcare Executives, and brings over thirty-five years of healthcare administration experience. After twenty-three years working in executive operational roles at hospitals in Northern Ohio and New York City, he dedicated seventeen years to serve as the CEO of the Cleveland Clinic's two 500-bed teaching hospitals.

Jeff completed his undergraduate at The Ohio State University, and received a Masters in Healthcare Administration from the Roth Graduate School of Business at Long Island University.

Julianne Renz

VP of Information Services & CIO

Julianne coordinates IT operations and front-end development of PMG's proprietary database.

Julianne has more than 19 years of experience in healthcare including strategic planning, program growth and development, process improvement, marketing, and performance management. Prior to joining Pain Management Group, she was the Business Development Manager for OhioHealth.

Julianne earned an MBA from Franklin University and a BS in Allied Health, Physical Therapy from The Ohio State University. She is a Six Sigma Black Belt.

Sara Darr

North Region COO

Sara oversees the Regional Directors of Operations for our Northern region partnerships. Sara utilizes her strong background in nursing, management, and hospital compliance to help lead PMG’s operations team. Her experience in clinic operational management and regulatory oversight allows her to lead PMG’s continued focus on service quality.

Sara graduated from Owens Community College with an Associate Degree in Registered Nursing, and joined PMG after 10 years of hospital and management experience. She previously was the Clinic Manager of the Memorial Hospital Pain Management Center at Fremont Memorial Hospital in Fremont, OH.

Lisa Eidelberg

South Region COO

Lisa oversees the Regional Directors of Operations for our Southern region partnerships. She dedicates her time to leading and developing our RDOs for continued program quality, effective growth, and strong partner relationships.

She has over 11 years of healthcare industry experience including management, program development, strategic planning, operations, physician recruiting, communications, marketing and sales. Prior to joining Pain Management Group in October 2012, Lisa was the Director of Membership Development and Business Partners for the Ohio State Medical Association located in Central Ohio.

Jason Berkhalter

West Region COO

Jason began working with PMG in 2015 and leads growth and oversees operations of our partner centers and RDOs in the southern Midwest region.

Jason has an expansive background in the business sector with focus on Investing and Healthcare Management. Jason most recently worked as the Vice President of Investments for an investment firm out of Fort Wayne, Indiana.

Jason holds a Masters of Business Administration, and a BS in Business Administration from Taylor University.

Jenn Reese

Central Region COO

Jenn oversees operations and leads growth at several of our partner centers in Ohio. Additionally, she assists in the hiring and training of employees and also oversees patient care protocols to ensure hospital compliance. Jenn also assists in the financial decision making, planning and budgeting.

She joined Dr. Ned at Pain Management Group as Director of Operations for the very first pain management center. In an effort to create a comprehensive, process-driven solution, Jenn was instrumental in starting and managing the operations of four other joint ventures.

Mike Waters

Director of Implementation

Mike joined PMG in 2013. He specializes in coordinating the start-up of new programs with an efficient, team-based process.

Mike served over 20 years in the U.S. Navy. He finished his career with tours as the Medical Senior Enlisted Advisor at Camp David and White House Medical Unit. After retiring from the service in 2010, Mike joined Kaiser Permanente where he served as the Facility Operations Manager for the District of Columbia and later as the Director of Medical Operations for a Concierge Medical Practice serving ultra-high net worth clients.

Mike earned a BSHS in Health Care Management from Touro University in Cypress, California while serving in the military.

Janel Pardi

Executive Assistant to CEO, COO, and Medical Director

Janel joined PMG in October 2016. She provides administrative support for PMG’s CEO, and utilizes her background and education in office administration to assist with scheduling, communication, and meeting planning.

Janel began her career at Riverside Methodist Hospital in Columbus, Ohio, and then spent 16 years at Blanchard Valley Health System in Findlay, Ohio. While at Blanchard Valley, she worked as the executive assistant to the CEO and also supervised the other assistants and medical staff office. During this time, Janel served on the Board of the Ohio Society of Healthcare Executive Assistants. Janel earned her Associate's degree in Medical Office Administration from Columbus State Community College.

Spencer Bertram, MD, DC

Assistant Medical Director

Dr. Bertram joined PMG in 2019 to provide additional medical director services and support for PMG's pain management providers, as well as offer physician coverage at various partner programs in Michigan. Dr. Bertram is a board-certified and fellowship-trained pain management physician.

After graduating from Logan University as a Doctor of Chiropractic, Dr. Bertram went on to graduate with honors from Ross University School of Medicine. He completed an internship in Internal Medicine and a residency in Anesthesiology before completing a Pain Fellowship from the University of Michigan. Dr. Bertram has experience working in private practices, providing care as a contracted provider with PMG, and serving as a pain management center Medical Director and Attending Anesthesiologist.

Mary Musick

Corporate Communications Manager

Mary joined the PMG team full-time in June of 2015. She manages and develops all corporate internal and external communications to ensure clarity, consistency, and efficiency in our communication processes, training initiatives, and organizational development. Mary also manages PMG's processes for hiring and onboarding internal team members.

Mary has a Bachelor of Arts in both English and Teaching English to Speakers of Other Languages (TESOL) from Indiana Wesleyan University. Prior to joining PMG, she worked as an English instructor for a language center in Indianapolis, and created, coordinated, and taught an EFL program for an online school.

Ashley Spencer

Marketing Specialist

Ashley joined the PMG team in July 2019 and brings a diverse set of experiences in marketing, sales, and entrepreneurship that equip her to lead the development of our corporate and partner marketing processes.

Throughout her career, Ashley has gained experience in marketing and business to business sales. Ashley has experience collaborating with marketing teams to increase brand consistency, conduct secondary market research for future product development, and create scripts for new product launches.

Ashley received her B.S. in Marketing from Miami University, and completed an MBA at the University of Chicago Booth School of Business with concentrations in marketing and entrepreneurship.

Melissa Fletcher

Office Manager and Executive Assistant to the CFO

Melissa provides administrative support to the operations and executive team members. She directly supports the CFO and COO, and is responsible for PMG’s Accounts Payable and Accounts Receivable.

Prior to joining PMG in 2011, Melissa held various roles in home healthcare and assisted living. She also brings extensive experience in customer services, business development, and regional account management from her nine years with Solomon Software.

Melissa holds an Associate’s Degree in Accounting and was ABWA (American Business Women’s Association) Hancock County Chapter business woman of the year.

Cheryl Stephenson

Provider Support Specialist

Cheryl joined the PMG team in 2019. She is responsible for overseeing hospital privileging, as well as assisting with a variety of functions associated with provider support.

Cheryl brings a diverse set of experiences to the PMG team with her background working in Human Resources and administrative support roles. Throughout her career, she has utilized her strong organizational skills to assist customers and support recruiting teams by keeping their recruiting and benefits systems organized, accurate, and efficient.

Cheryl received her Bachelors of Science in Elementary Education from Bowling Green State University.

Cole McMath

Business & Provider Development Specialist

Cole joined PMG in November 2017 and oversees provider recruitment processes, assists with contract arrangements for new providers and partners, and helps support and identify opportunities for new partner growth.

Prior to joining PMG, Cole completed his Masters in Public Health from The University of Texas in Houston with a focus on health promotion/behavioral science and healthcare management. While completing his Masters, Cole worked for the Dell Center for Healthy Living and completed internships with the Texas Medical Center, Decision Frameworks, and Nokia Growth Partners. Cole has a Bachelors in Chemistry from Miami University in Oxford, Ohio.

Brennan Bookmyer

Provider Process Specialist

Brennan joined PMG in August of 2017 on a contracted basis to assist with various IT projects, and two months later transitioned to become a full time Regional Manager of Operations.

After gaining operational experience,Brennan became PMG's Provider Process Specialist and leads the implementation and onboarding processes as well as ongoing support for new pain management providers.

Brennan has a Bachelors in Science from Taylor University in Upland, Indiana, and a Masters in Information and Communication Sciences from Ball State University in Muncie, Indiana.

Anna Alexander

Clinical Operations Specialist

Anna joined PMG in 2014 to observe and coach nursing and office staff in each of our partner centers in order to refine habits and standardize practices for high quality, efficient patient care. Anna brings in twenty-three years of experience as an RN, including seven years as a nurse in a pain management center.

Anna has 23 years of experience as an RN, including seven years as a nurse in a pain management center. She is a certified pain management nurse and a member of the American Society for Pain Management Nurses (ASPMN) and the Association of PeriOperative Registered Nurses (AORN).

She received a Bachelor of Science in Dietetics from Bowling Green State University and an Associate degree in nursing from Kentucky State University.

Susie Keegan

Clinical Operations Specialist

Susie joined PMG in 2014 to observe and coach nursing and office staff at our partner centers. She worked alongside PMG’s medical director for four years in a pain management clinic, which has enabled her to offer valuable perspectives for continual improvement of patient care and staff efficiency.

Susie graduated from Owens Community College with an associate degree in surgical technology. She is a seasoned CST with six years of hospital experience and 16 years as a CST and office assistant at a fast-paced ophthalmology group.

Tyler Fox

IT Analyst

Tyler came to PMG in 2014 with 8+ years of IT experience.

He brings to PMG creativity in website development including creation of custom user interfaces and website applications, skills in database design and development, and network engineering.

Tyler focuses on developing and expanding our custom software to enhance use in daily operations and reporting, increase partnership with partner Information Technology resources, internally create and manage the PMG website, and provide internal support of PMG technology and network needs.

Phil Geitgey

IT Analyst

Phil came to PMG in 2015 with 6+ years of IT experience.

He brings creativity in database design and data mining, and has worked with numerous IT consulting firms as well as governmental agencies.

Phil focuses on developing and expanding our custom software to enhance use in daily operations and reporting, increase partnership with partner Information Technology resources, and provide internal support of PMG technology needs.

Phil graduated from Heidelberg University in 2003 with a Bachelor’s Degree in Computer Information Systems and Business Administration. Additionally he completed the IT Specialist Program at Northwest State Community College.

Caleb Hartman


Caleb joined PMG in early 2019 to assist in the management of the accounting operations while working alongside hospital finance to oversee healthcare and physician reimbursement.

Caleb is a Certified Public Accountant with over 5 years of experience prior to joining PMG. Throughout his years practicing as a CPA, he provided external audit services to healthcare organizations, ranging from billion dollar health systems to small community hospitals. He has extensive experience working directly with hospital management to ensure their organizations are complying with accounting rules and regulations.

Caleb received his Bachelors in Accounting from Indiana University.

Sally Roddy

Finance Manager

Sally works directly with the CFO to prepare recurring financial analyses, and annual operating and capital budgets. She works alongside hospital finance, patient financial services, and physician billing companies, and lends financial support to the PMG Development and Implementation teams.

Before joining the PMG team in the fall of 2014, Sally was a senior accountant at OhioHealth. Her 19 years in finance also include experience as a staff auditor with Perry & Associates.

Sally earned her BA in public accounting at Marietta College.

Andrea Mescall

Senior Financial Analyst

Andrea joined PMG in April 2017 and utilizes her expertise in healthcare financial management to provide continued financial support for our partners through preparing analyses, budgets, and leading routine calls and meetings. Andrea has extensive experience in data analysis, accounting, budgeting, reporting, and financial statement management within the healthcare and non-profit realms.

Andrea has her Bachelor of Arts in Accounting and Business Management from Franklin College, and is currently a candidate for the Masters of Business Administration program at Indiana State University.

Sammie Hall

Regional Director of Operations

Sammie joined PMG in 2012 and utilizes his strong medical acumen and years of operational management and leadership as Regional Director of Operations for multiple sites in Ohio. Sammie served twenty-four years in the U.S. Navy and worked five years at Ohio Health, supplying him with valuable experience directing staff and physician team building, medical logistics planning on an international level, and operational management.

Sammie earned a BSHS in Health Care Management from Touro University in Cypress, California while serving in the military. He earned a masters degree at Trident University.

Michele Barnett

Regional Director of Operations

Michele joined PMG in June of 2016. Michele utilizes her vast experience in operations and pain management nursing to provide leadership and oversight for the Mount Carmel Health System Pain Management programs.

Michele has 12 years of healthcare experience and is a Registered Nurse as well as a member of the American Society of Pain Management Nurses. Most recently Michele served as the Nurse Manager for the Avita Health System Pain Management programs.

Michele earned her Nursing Degree from North Central State College.

Sara Baldosser

Regional Director of Operations

Sara joined PMG in February 2017 to work as a Regional Director of Operations in the Central Ohio area. She brings valuable experience to her role as an RDO from her time spent working as a charge nurse, forensic nurse program coordinator, public health nurse, and nurse director of emergency services.

Sara has over 20 years of experience in nursing, management, and leadership, along with a Masters in Nursing and specialization in Leadership and Management.

Jennifer O’Brien Isenhath

Regional Director of Operations

Jennifer joined PMG in June 2017 to work as our Michigan market Regional Director of Operations. Jennifer brings over twenty years of experience in healthcare, particularly within operations management, human resources, consulting, marketing, and contract management.

Prior to working with PMG, Jennifer was the Operations Manager at the Sparrow Pain Management Center in Lansing, MI.

Jennifer has a Bachelor’s in Business Management from Central Michigan University, as well as an MBA from the University of Phoenix.

Rebekah Reasor

Regional Director of Operations

Rebekah joined PMG in 2018 to oversee operations and growth at our partner sites in Kentucky.

Rebekah has over 17 years of healthcare experience as a pharmaceutical sales representative, where she established and managed the Kentucky markets for several pharmaceutical companies. During her time as a territory representative, she gained valuable experience by managing multiple, complex sales territories, launching and establishing new products and marketing initiatives, and consistently meeting and exceeding sales and revenue goals.

Rebekah has her Bachelors in Exercise Physiology from the University of Kentucky.

Brenda Hill

Regional Director of Operations

Brenda started working with PMG in 2018 and serves as the on-site Regional Director of Operations at the Rhea Pain Management Center in Dayton, TN.

Brenda started her career in healthcare as an Emergency Medical Technician, and during that time earned her Associate of Science in Nursing to become a Registered Nurse. Brenda joined the team at Rhea Medical Center in 2012, gaining experiencing as an ER nurse and Surgery Clinical Coordinator. She currently utilizes her expertise to lead the pain management center's operations and growth as the clinic manager and RDO.

Brenda received her Associate of Science in Nursing from Chattanooga State Technical Community College in Chattanooga, TN.

Shannon Wyer

Regional Director of Operations

Shannon joined PMG in 2018 to oversee operations and growth of our partnership with Regional One Health in Memphis, Tennessee.

Shannon has over 11 years of operational experience, including multi-site management throughout the United States in dental and optical care. Shannon has successful experience in driving margin improvement and volume growth, physician relations, organizational leadership, expense management, strategic growth, improving operational performance, and maintaining high-quality customer service.

Shannon has her Bachelors in Elementary Education from Louisiana State University.