Pondera Medical Center Providers

To learn more click the picture to read Provider's Bio. 


Clinic Providers

Edith Ellsworth, Family Nurse Practitioner at PMC in Conrad Montana
Dr. Jay Taylor
david arends.jpg
Aaron Dahle, PA-C at Pondera Medical Center Conrad, Montana

Visiting Physicians

DR. DEBORAH HOFFMAN of Kalispell Regional Healthcare, pulmonology, critical care and sleep medicine
Dr. Grant Harrer Hematology & Oncology at Benefis in Great Falls, Montana

Grant Harrer, MD


Dr. Tom Warr, Oncologist at Great Falls Clinic in Montana

Tom Warr, MD

Oncology/Internal Medicine 

Dr. David Healy, Otolaryngologist joined Glacier Ear, Nose, & Throat from Kalispell Regional Healthcare facility in Montana
Dr. David Boes, Ophthalmologist at Boes Eye Care in Montana

David Healy, MD 
Ear, Nose, & Throat Otolaryngologist 

Chad Engan, MD, FACS

General Surgery 

David Boes, MD, Ophthalmologist


Brennan, MD


Puneet Bansal, MD



Eisenhauer, MD


Dr. Jorge L. Castriz, Cardiology at Great Falls Clinic, Montana

Jorge Castriz, MD


Dr. Michael Ritchie, Cardiologist at Great Falls Clinic Specialty Center

Michael Ritchie, MD


Anna Rosteck, LCSW

Social Worker


Emergency Room  Providers

Jay Taylor, MD

Scott Seager, PA-C

David Arends, PA-C

N. Lee Walker, PA-C

Patrick Alduenda, PA-C

Rural Health Clinic Providers

Jay Taylor, MD

Dr Taylor is a 2002 graduate of the University of Colorado School of Medicine.  After graduation, Dr. Taylor completed residency programs in Billings, MT; Greeley, CO; and Wray, CO.  Dr. Taylor is Board Certified in Family Practice.  Dr. Taylor was born and raised in Conrad and currently resides here with his wife and two children.

Edith Ellsworth, FNP

Edith (Edie) joined PMC in April 2017 as our Family Nurse Practitioner in the Clinic. She earned her Master of Science degree in Nursing from Gonzaga University and Post Master’s Certificate from MSU-Bozeman.  She earned her Certificate in Family Practice, served 31 years total as a nurse, and 6 years as a Nurse Practitioner.  The Great Falls native states her favorite part about Conrad is “the small town feel and the people that have welcomed her here.” Edith enjoys working with the people at PMC: “The other providers, nurses, and patients are all fabulous.”  We are thrilled to have Edie as part of our team at PMC.  You can schedule an appointment with her by calling the clinic at 406-271-3231.

Aaron Dahle, PA-C

We welcomed Aaron Dahle, PA-C to the provider team at the PMC Clinic in September 2017. After Earning his Bachelor of Science Degree in Clinical Laboratory Science at Brigham Young University in Provo, UT in 2005, Dahle went on to achieve his Masters of Physician’s Assistant Studies at the University of Colorado in 2011 and is currently a member of the American Academy of Physician Assistants and American Society of Clinical Pathologists. Dahle served for over five years in the Army National Guard in three states, including Alaska and Kansas, and is currently active with the Army National Guard in Montana.  Dahle is fluent in a Philippine dialect, called Tagalog, which proved to be an invaluable skill as he served a mission in the Philippines from 1999-2001.  Dahle’s medical experience ranges from dermatology, neonatology, palliative care, and long-term care through his clinical rotations as a PA-Student.  Dahle has 6 years of experience as a Family Practice PA-C, all of which were spent in Rural Family Medicine in Alaska, Kansas, and at Benefis Teton Medical Center in Choteau, MT prior to joining PMC. Originally from Fairview, MT, population 920, Dahle loves the small town lifestyle.  He enjoys camping, fishing, and hiking with his wife and children.  Schedule an appointment with him by calling the PMC clinic at 406-271-3231.

David Arends, PA-C

After taking some time to explore professional venues and expand his medical experiences in emergency medicine, David was ready to get back to the work he loves most. We welcomed David back to PMC Clinic in December 2018. David received his bachelor’s degree from Oral Roberts University in Tulsa, OK.  After 10 years of teaching in secondary education David decided to pursue a medical career and completed his physician assistant studies at Bayley Seaton Hospital in New York City. He has specialized in family practice and urgent care for over 20 years in various clinical settings, including 3 years in a small village in Belize, Central America and more than 9 years at PMC Clinic.  Over time, David’s professional interests began to shift towards emergency medicine. He focused his ongoing training in this specialty and worked in the emergency department at PMC from July 1 of 2017 through November of 2018. He holds certifications in ACLS, PALS, ATLS, and CALS. He and his wife, Jane, reside in Conrad and enjoy community involvement through various artistic venues including the Pondera Players and directing the Conrad Community Choir.


The study and treatment of the respiratory system. 

Deborah Hoffman, MD, Pulmonary Disease and Sleep Medicine

Dr. Hoffman comes to Pondera Medical Center as a new provider at Rocky Mountain Heart and Lung. She brings 20 years of expert care and experience focused on pulmonology, critical care and sleep medicine. Her approach to healthy living is rooted in a balance of good nutrition, regular exercise and restorative sleep. Dr. Hoffman earned her medical degree from the University of Miami in Florida and subsequently headed west for her residency and fellowship work at the University of California, San Diego in internal medicine and pulmonary and critical care. She has a robust background in the study of sleep apnea and believes that identifying untreated sleep disorders can help positively impact patients’ lives and reduce associated medical costs. She offers comprehensive skills to help screen, educate, test, manage and track sleep patterns to alleviate sleep apnea, maximize wellness and improve the quality of life for her patients. Dr. Hoffman also will be sharing her expertise as medical director for Kalispell Regional Healthcare’s Outreach Sleep Medicine Programs, providing this much-needed service to the greater Flathead community and northwest Montana. Dr. Hoffman heeds her own advice and stays active and healthy as a long-distance endurance runner and cyclist as well as a four-time Ironman triathlete. Certifications: American Board of Internal Medicine / Pulmonary Disease / Critical Care / Sleep Medicine. Fellowships: University of California, San Diego – internal medicine and pulmonary and critical care. Medical School: University of Miami  | Residency: University of California, San Diego


The study and treatment of tumors and cancer. 

Grant Harrer, MD 
Dr. Harrer graduated from the University of Texas Medical School at Houston in 1981. He works in Great Falls, MT and specializes in Hematology/Oncology. Dr. Harrer is affiliated with Benefis Health System Main Campus and Benefis Health System West Campus.


The study and treatment of tumors and cancer; and diagnosis and medical treatment of diseases and disorders of internal structures of the body.

Tom Warr, MD, Onocologist

Thomas Warr received his medical degree from Vanderbilt University in Nashville, Tennessee. He completed his residency and chief residency in Internal Medicine and then his fellowship in the hematology and oncology division and the department of medicine at the University of California in San Diego, CA. He has contributed to several publications and abstracts. Dr. Warr practiced hematology and oncology in Great Falls for 21 years, during which time he was also medical director of Peace Hospice of Montana, the American Red Cross, and Benefis Cancer Conference. Dr. Warr is very active in clinical research. More recently, he has been in practice in California, but is pleased to return to Big Sky Country.  To schedule an appointment contact Great Falls Clinic at 406-771-3060


The study and treatment of diseases affecting the heart. 

Jorge L. Castriz, MD
Dr. Castriz specializes in non-invasive/general cardiology, interventional cardiology, peripheral arterial disease, and peripheral angiography/interventions. Dr. Castriz graduated from University Central del Este, San Pedro de Macoris, Dominican Republic, 1984. He completed is internship, residency, and fellowship at University of Oklahoma Health Science Center. Dr. Castriz is board certified in Internal Medicine, Cardiovascular Diseases and Interventional Cardiology as well as a fellow of the American College of Cardiology. Dr. Castriz is accepting new patients and physician referrals at the Pondera Medical Center Clinic. 
Schedule an appointment with Dr. Castriz by calling the Great Falls Clinic at 406-454-2171. 


Elizabeth, O'Connor, NP, FNP
Ms. Elizabeth O’Connor, NP, FNP, is a Family Nurse Practitioner who specializes in Cardiovascular Diseases at Benefis Hospitals Heart & Vascular Institute.  She completed her Bachelor of Science in Nursing in 1981 at Montana State University College of Nursing at Bozeman, Montana. She completed her Master of Science in Nursing in 1989 at St. Louis College of Nursing and then, earned her Family Nurse Practitioner Degree in 1998 at Montana State University College of Nursing in Bozeman, Montana.  She holds national board certifications with the American Nurses Credentialing Center (ANCC) as a Family Nurse Practitioner, Cardiovascular Registered Nurse II (CVNII), Critical Care Registered Nurse (CCRN) and is a Certified Legal Nurse Consultant.  Schedule an appointment by calling 406-455-4320.


Michael Ritchie, MD
Dr. Ritchie is a board certified interventional cardiologist, and joined the Great Falls Clinic Heart Center practice in January of 2017. Dr. Ritchie grew up in Lanesville, Indiana. Dr. Ritchie offers the full complement of cardiology services including arterial catheterization; temporary pacemakers; conventional and stress echocardiography, transesophageal echocardiography as well as exercise and pharmacologic stress testing. He also brings his expertise in all aspects of coronary angioplasty, including structural heart disease such as closure of atrial septal defects, balloon valvuloplasties; and peripheral angiography (AAA endovascular stent grafts, renal artery stents), DCA, rotablator, brachytherapy, IVUS and physiologic lesion assessment. Dr. Ritchie is board certified in Internal Medicine, Cardiovascular Diseases and Interventional Cardiology and is a member of multiple professional organizations including the American Heart Association and the American Association for the Advancement of Science. Dr. Ritchie completed his undergraduate work at the University of Evansville, where he played baseball for three years. He attended medical school at Indiana University, where he graduated with highest honors in 1986. He completed his residency at Case Western Reserve in Cleveland in 1989 and his fellowship at Washington University in Saint Louis, where he performed clinical rotations while receiving interventional training. Dr. Ritchie is accepting new patients and physician referrals at the Great Falls Clinic Specialty Center. To schedule an appointment, please call 406-454-2171.



Otolaryngology: The surgical and medical treatment of diseases of the ears, nose, throat, and neck. 

David Healy, MD - Ear, Nose, & Throat (ENT), OTOLARYNGOLOGIST

Dr. Healy joined the practice of Glacier ENT in August 2015. The U.S. Navy Medical Corps commander comes to PMC from Portsmouth, Virginia, where he held several leadership positions with the Naval Medical Center, Portsmouth. Dr. Healy earned his medical degree from the Uniformed Services University of the Health Sciences, and then completed both his general surgery internship and otolaryngology residency at the Naval Medical Center San Diego. He received his Board Certification in otolaryngology and trained further under a rhinology fellowship with Harvard Medical School, Massachusetts Eye & Ear Infirmary. Dr. Healy achieved the rank of captain in the United States Marine Corps, and served as an infantry battalion surgeon during Operation Iraqi Freedom. He also was an otolaryngologist with the Tripler Army Medical Center before transitioning to his role in Portsmouth. He enjoys spending his leisure time with his family of five in the great outdoors of Montana. Please call Glacier Ear Nose & Throat at 406-752-8330 if you would like to make an appointment.


A broad spectrum of surgical treatment for any area of the body. 

Chad Engan, MD, FACS- General Surgery

Dr. Engan received his medical degree from New York Medical College in Valhalla, New York.  He completed his UCSD Surgical Residency in Bakersfield, California.  He has contributed to several presentations and publications; his most recent publication “Description of RASS-TAPP Inguinal Hernia Repair and Presentation of Clinical Outcomes” was released in June 2015 in Hernia-The World Journal of Hernia and Abdominal Wall Surgery.  Dr. Engan has been practicing General Surgery at a Private Practice since 2005, and prior to that was a General Surgeon for the Great Falls Clinic.  Dr. Engan serves on many committees and organizations. He is currently medical director for the Robotics Program, as well as the Trauma Program at Benefis Health Systems, the director and instructor for the Advanced Trauma and Life Support Course, and the Regional Trauma Chair for the Central Montana Region.  Dr. Engan is also a member of the American College of Surgeons, Eastern Association for the Surgery of Trauma, American Society of Breast Surgeons, the Clinical Robotic Surgery Association, as well as two Hernia Societies.  When Dr. Engan is not in surgery or serving on a committee or board, he enjoys playing chess, golf, and reading Russian Literature. Dr. Engan serves the needs of PMC Patients for: General and Advanced Laparoscopic Surgery, Surgical Oncology, Endocrine Surgery, Gastrointestinal and Varicose Vein Surgery, Breast Surgery. To schedule an appointment in Conrad contact 406-271-3231

"I believe in taking time to listen to my patients and in providing excellent surgical care both preoperatively as well as postoperatively." - Chad Engan, MD


The branch of medicine dealing with the eyes. 


Dr. Boes is a fellowship -trained ophthalmologist, and specializes in cataract surgery and glaucoma surgery. Dr. Boes received his medical degree from the University of Nebraska Medical Center in Omaha, Nebraska. He completed his internship and residency at the University of Washington Medical Center in Seattle, Washington, and his fellowship at Wills Eye Hospital in Philadelphia, Pennsylvania. Dr. Boes is board certified with the American Board of Ophthalmology. Dr. Boes is affiliated with the American Society of Cataract and Refractive Surgeons, the American Academy of Ophthalmology, the Montana Academy of Ophthalmology, and the Alpha Omega Alpha Honor Medical Society.  To schedule an appointment with Dr. Boes, call Boes Eye Care at 406-455-2020.





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