Providers
Experienced. Compassionate. Dedicated to Your Care.
Going into a procedure that requires anesthesia can bring up questions, and understanding who’s caring for you is important. Here at MAAC, your safety and comfort are our top priorities, and that’s why we employ a highly skilled team, including 8 Anesthesiologists and 30 Certified Registered Nurse Anesthetists (CRNAs) to manage your care.
While both Anesthesiologists and Certified Registered Nurse Anesthetists (CRNAs) are essential and expertly trained in anesthesia, they have different educational paths and scopes of practice.
Anesthesiologist (MD/DO)
- An anesthesiologist is a medical doctor (MD or DO) who has completed medical school followed by a four-year residency specializing in anesthesiology.
- They specialize in perioperative care, meaning they assess your health before surgery, administer and manage your anesthesia during the procedure to control pain and consciousness, and oversee your recovery afterward.
- They are also experts in acute and chronic pain management.
Nurse Anesthetist (CRNA)
- A CRNA is a highly trained advanced practice nurse who specializes in anesthesia.
- They are responsible for assessing patients, administering anesthesia, monitoring vital signs, and managing the anesthesia throughout surgical procedures or medical interventions.
- At MAAC, our CRNAs work in a collaborative care team model, often partnering directly with anesthesiologists, surgeons, and other operating room staff to provide seamless and comprehensive care.
Anesthesiologists

Thomas Meyer
Residency: University of Kentucky
Fellowship: University of Iowa
(Cardiovascular and Thoracic Anesthesia with TEE Testamur)
Years of Experience: 18
Years at MAAC: 15

Lucas Blount
Residency: University of Missouri (Anesthesia and Internal Medicine)
Years of Experience: 6
Years at MAAC: 6

Mark Cohen
Residency: UMKC St. Luke’s Mid- America Heart Institute
MAAC Founding Member
Years of Experience: 31
Years at MAAC:27

Paul Thompson
Residency: University of Alabama Birmingham
MAAC Founding Member
Years of Experience: 31
Years at MAAC: 26

Brian Hecht
Residency: WUSL Washington University
Years of Experience: 30
Years at MAAC: 19

James Voon
Residency: University of Missouri
Fellowship: University of Missouri (Regional Anesthesia)
Years of Experience: 6
Years at MAAC: 1

Allen Cass
Residency: University of Wisconsin
Years of Experience: 32
Years at MAAC: 20

James Zaner
Residency: Mayo Clinic Rochester
MAAC Founding Member
Years of Experience: 25
Years at MAAC: 25
Paul Thompson
Residency: University of Alabama Birmingham
Years of Experience: 31
Years at Boone Health: 26
Call Team

Steve Seibert
CRNA
Education: Webster University
Years of Experience: 20
Years at MAAC: 20

Scott Broughton
CRNA
Education: Missouri State University
Years of Experience: 16
Years at MAAC: 16

Brad Korman
CRNA
Education: Missouri State University
Years of Experience: 23
Years at MAAC: 16

Daniel Beary
CRNA
Education: Missouri State University
Years of Experience: 7
Years at MAAC: 7

Michelle Belgeri
CRNA
Education: Missouri State University
Years of Experience: 7
Years at MAAC: 7

Ray Nordyke
CRNA
Education: SIU Edwardsville
Years of Experience: 7
Years at MAAC: 7

Taylor Frymire
CRNA
Education: Missouri State University
Years of Experience: 5
Years at MAAC: 5

Michael Bozung
CRNA
Education: Middle Tennessee School of Anesthesia
Years of Experience: 8
Years at MAAC: 4

Britt Lehr
CRNA
Education: Mount Marty University
Years of Experience: 4
Years at MAAC: 4

Connor Hager
CRNA
Education: Fran University
Years of Experience: 3
Years at MAAC: 3

Cullen Ralphs
CRNA
Education: Webster University
Years of Experience: 2
Years at MAAC: 2

Anna Wong
CRNA
Education: University of Tennessee
Years of Experience: 1
Years at MAAC: 1
Day Shift

Curt Brown
CRNA
Education: Missouri State University
Years of Experience: 18
Years at MAAC: 18

Brent Dowell
CRNA
Education: Truman Medical Center
Years of Experience: 1
Years at MAAC: 1
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OB Team

Mike Fann
CRNA
Education: Missouri State University
Years of Experience: 14
Years at MAAC: 5

David Lucas
CRNA
Education: Westminister University
Years of Experience: 15
Years at MAAC: 4

Ashton Ringen
CRNA
Education: University of Kansas
Years of Experience: 9
Years at MAAC: 5

Lyssa Hill
CRNA
Education: Missouri State University
Years of Experience: 4
Years at MAAC: 2

Casey Beckley
CRNA
Education: Wake Forest University
Years of Experience: 4
Years at MAAC: 1
Ashton Ringen
CRNA
Admin Team

Heidi Woods
Registered Nurse/Administrative Assistant
Contact Us
We know that preparing for a procedure can bring up questions, and we’re here to make sure you have all the information you need. Contact our team anytime—we’re happy to provide guidance, explain your anesthesia options, and help you feel at ease every step of the way.
Contact Us
We know that preparing for a procedure can bring up questions, and we’re here to make sure you have all the information you need. Contact our team anytime—we’re happy to provide guidance, explain your anesthesia options, and help you feel at ease every step of the way.
