Meet the Physicians

E. Brooke Spencer, MD, FSIR

Medical Director and CEO MIPS


Bachelor of Arts, Dartmouth College (1991)
Doctor of Medicine, University of Vermont, College of Medicine (1995)
General Surgery Internship, University of North Carolina Hospitals in Chapel Hill, NC (1996)

Diagnostic Radiology Residency, Duke University Medical Center in  Durham, NC (2000)

Interventional Radiology Fellowship, Mallinckrodt Institute of Radiology, Washington University in St. Louis, MO (2001)

Board-Certified, Fellowship-Trained Interventional Radiologist

Dr Elizabeth “Brooke” Spencer is an interventional radiologist, and serves as the Medical Director and CEO of Minimally Invasive Procedure Specialists in South Denver, Colorado. Dr. Spencer has been Chairman of Radiology and Interventional Radiology at Littleton Adventist Hospital for many years. Prior to serving in this role, she was on staff and served as Medical Director (2011-2015) of the RIA Endovascular Clinic.

Dr. Spencer is internationally renowned for treatment of patients with chronic DVT and PTS and performs all IR procedures. She has treated thousands of patients suffering from the effects of chronic (old) deep vein blood clots with advanced techniques that are not offered in most IR practices . Her other main focuses include, women’s treatments -pelvic venous congestion and uterine fibroids and she has a fairly large renal cryoablation and interventional oncology practice as well.

Professional Honors and Accomplishments

E Brooke Spencer, MD, FSIR received recognition as “Best Doctors” in the Denver Business Journal’s August 7-13, 2015 edition.

Dr. Spencer was voted into Fellowship of the Society of Interventional Radiology (a high honor) for her contributions to the field.

Dr. Spencer has been principle investigator on several research projects over the years, has multiple publications and is a dedicated educator, speaking at society meetings across the country. She has been president of the Western Angiographic and Interventional Society, serves in the venous service line for the Society of Interventional Radiology and was a founding member of the non -profit organization the Interventional Initiative. The ii was formed to provide patient education on high level minimally invasive image guided procedures that can replace surgery. She was featured in the first of a series of 12 documentaries (

Outside the Office

Dr. Spencer can be found spending time with her family; Andy and 2 wonderful boys. She enjoys golfing, biking, and skiing in the great Colorado outdoors.


Charles Nutting, DO, FSIR



Bachelor of Science, Loyola University of Chicago

Doctor of Osteopathic Medicine, Chicago College of Osteopathic Medicine

Diagnostic Radiology Residency, Midwestern University, Chicago, IL

Interventional Radiology Fellowship, Rush-Presbyterian Medical Center, Chicago, IL

Board Certified – Fellowship Trained Interventional Radiologist

Dr. Nutting is internationally renowned for his liver directed cancer therapies. He has performed over 1300 Y90 radioembolizations for liver tumors, has a large practice ablating (freezing and burning) tumors in many organs.  He has been on the cutting edge of new treatments including prostate artery embolization for the treatment of benign prostatic hypertrophy in men.  His over 20 years of experience in general interventional radiology has made him proficient in all areas of minimally invasive image guided surgery.

He has been involved in many research studies, publishes in several fields of medicine and has lectured all over the world. He was recently honored as the Dotter Lecturer at the Western Angiographic Society and a fellow of the Society of Interventional Radiology.

Professional Honors

Dr. Nutting was presented with the Humanitarian Award twice by Skyridge Medical Center in Lone Tree, Colorado

Dr. Nutting has been a fellow in the Society of Interventional Radiology for the last decade

Dr. Nutting was the past president of the Western Angiographic and Interventional Radiology Society

Outside the Office

Dr Nutting enjoys all of the outdoor activites Colorado has to offer. He teaches other physicians around the country the skills necessary for liver tumor treatment and prostate artery embolization. He has a wife and 2 boys in high school.

Check out this article about Dr. Nutting and the patients he treats who have benign prostate hyperplasia!

Link to article


Brent Steadman, MD, PhD


Bachelor of Science, Furman University in Greenville, SC

Doctor of Medicine and Philosophy, Medical College of Georgia in Augusta, GA

Internal Medicine Internship, Carolinas Medical Center in Charlotte, NC

Diagnostic Radiology Residency, Wake Forest University in Winston Salem, NC

Interventional Radiology Fellowship, Virginia Commonwealth University in Richmond, VA

Board Certified, Fellowship-trained Interventional Radiologist

Dr. Brent Steadman comes to MIPS from West Virginia University in Morgantown, WV where he developed a robust interventional radiology and wound practice over the last 6 years.  Dr. Steadman has developed a passion and expertise for treating venous and arterial problems in leg ulcer patients.  Using the most advanced minimally invasive techniques and technology, Dr. Steadman saves patient limbs.  Many of the patients he has healed were told by other vascular doctors that amputation was the only option.  Other patients who have suffered with long standing leg ulcers have found healing and relief with Dr. Steadman’s treatments.

Dr. Steadman helps patients with other problems.  He works with oncologists and surgeons to attack liver and kidney cancer with focused arterial treatments that deliver chemotherapy and radiation directly to the tumors as well as with needle like probes that freeze or heat tumors.  These treatments are outpatient procedures with minimal side effects that preserve quality of life.  Dr. Steadman treats vein problems including varicose veins, venous ulcers, varicoceles in men, and pelvic venous congestion in women suffering from chronic pelvic.  His minimally invasive expertise treats women with uterine fibroids helping them recover faster than any surgical options.

Professional Honors and Accomplishments

Dr. Steadman’s proudest achievement is treating every patient to the best of his ability.  He believes that every patient is unique and has a story that needs to be heard to effectively be their doctor.  Patients love Dr. Steadman, and he loves being their doctor.  In 2015, patient reviews awarded Dr. Steadman as a Press Ganey Top Provider Outpatient.

Outside the Office

Dr. Steadman loves skiing, whitewater kayaking, and mountain biking.  He spends his free time playing in the great outdoors with his family.


Aaron Kovaleski, MD


Bachelor of Science, College of William and Mary, Willliamsburg, VA

Doctor of Medicine, University of Arkansas for Medical Sciences, Little Rock, AR

Internal Medicine Internship, Baptist Health Systems, Birmingham, AL

Diagnostic Radiology Residency, University of Kansas Medical Center, Kansas City, KS

Vascular and Interventional Radiology Fellowship, University of Kansas Medical Center, Kansas City, KS

Board Certified, Fellowship-trained Interventional Radiologist

Dr. Aaron Kovaleski moved to Denver in the summer of 2018 after previously working in Richmond, VA and Pensacola, FL. During his tenure at each location, he developed and grew several Interventional Oncology programs, introducing microwave ablation to the panhandle of Florida, as well as starting Y90 programs at four locations. In Florida, he was part of a vascular surgery group which helped him develop an extensive skill set for treating peripheral vascular disease. In Richmond, he started ablation and liver-directed therapy programs at multiple hospitals, as well as participating in two stroke programs, one of which he started. He teaches physicians from around the US the nuances of Y90, and is also a speaker for oncologists and surgeons in regards to treatment options for liver cancer.

Dr. Kovaleski was an Emergency physician for several years before entering his radiology training. His ER background has given him a strong clinical and diagnostic skill set, unique to most others in his field. While he likes all aspects of Interventional Radiology, his primary interests are Hepatobiliary, oncology, Peripheral Vascular Disease, venous disease, and vertebral augmentation.

Professional Honors and Accomplishments

He received the Certificate of Merit for Research from the Radiological Society of North America, and has been published in cross-disciplinary journals such as Urology, as well as JVIR.

Outside the Office

In his spare time, Dr. Kovaleski enjoys laughing with his wife while their baby makes silly noises and faces. His other interests include physical fitness, useless trivia, NFL and college football, live sporting events, movies, fine dining, traveling, reading books, people watching, telling pointless jokes, music, and other nerdy things like comic books and documentaries.


Arwyn Taffs, MSN, ANP-BC


2007 – Bachelor of Science in Nursing, Montana State University

2012 – Master of Science in Nursing, University of Wisconsin – Madison


Adult Health Nurse Practitioner, American Nurses Credentialing Center – ANCC 2012, 2017

Arwyn grew up in Montana. After graduating with her BSN, she moved to Madison, WI where she worked at the University of Wisconsin Hospital as an RN while earning her Masters Degree in Nursing. After 7 years in the Midwest she relocated to Colorado and is delighted to be a Nurse Practitioner back in the Rocky Mountain region. She was previously in Lakewood practicing at an Internal Medicine, Pulmonary and Sleep Medicine practice, where she regularly traveled to rural Kansas to provide specialty pulmonary outreach clinics over her 4 years there. She is thrilled to be part of this exciting opportunity to help patients and join the team of outstanding professionals at MIPS Center!

Outside the Office

In her free time, Arwyn enjoys spending time with friends and family, learning new things, relaxing, or enjoying the sunshine while exploring Denver.