Providers

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Central Office

Paul D. Lobitz, M.D.
Board Certified Specialist in Family Medicine
Med School: University of Minnesota - Rural Physician Associate Program
Residency: North Colorado Family Medicine
Special Interests: Pediatric and adult medicine, obstetrics, prenatal ultrasounds, endoscopy/colonoscopy. Advanced training in cesarean section and tubal ligation.
"In my spare time I golf, run, hike, camp, and read."

Rose S. Macalister MSN, APRN, FNP-C
Board Certified Family Nurse Practitioner
Bachelor of Science, Nursing: University of Northern Colorado
Master of Science, Nursing: University of Northern Colorado
Special Interests: Geriatrics, lifestyle medicine
"Raised in Pueblo, Colorado, I have lived with my spouse and raised the kids in Fort Collins. My hobbies include textile arts, gardening, cooking, yoga and fitness."

Douglas A. Magnuson, M.D.
Board Certified Specialist in Family Medicine
Med School: University of Colorado
Residency: North Colorado Family Medicine
Dr. Magnuson is married with two children.
"Being a Greeley native, I am enjoying my practice here in Greeley, caring for the community in which I grew up."

Erin J. Morley, M.D.
Board Certified Specialist in Family Medicine
Med School: University of Kansas, Salina
Residency: North Colorado Family Medicine
Special Interests: Full-spectrum family medicine, obstetrics, women’s health and contraceptive management, adult and pediatric medicine
Dr. Morley is married with two children. She was born in the Philippines and traveled the world with her family doing mission work until they finally settled in Colorado which she considers home. She went to undergraduate and medical school in Kansas, but is glad to be back in Colorado to raise her family. She enjoys gardening, DIY home improvement, and spending time outdoors. 

Heidi J. Nightengale, D.O.
Board Certified Specialist in Family Medicine

Joy K. Ruff, M.D.
Board Certified Specialist in Family Medicine
Med School: University of Pittsburgh School of Medicine
Residency: In His Image Family Medicine Residency - Tulsa, OK
Special Interests: Obstetrics, prenatal and point of care ultrasound, pediatrics and women's health. Holistic care for the whole family. Completed advanced training in cesarean sections, tubal ligation and women's health procedures.
"I am married with four children and grew up in Colorado, so it is great to be home! I enjoy a variety of outdoor activities including biking, hiking, skiing and camping, church and spending time with family and friends."

D. Craig Wilson, M.D.
Board Certified Specialist in Family Medicine
Med School: University of Kansas
Residency: North Colorado Family Medicine

Cottonwood Office

Donna M. Brogmus, M.D., M.P.H.
Board Certified Specialist in Family Medicine

Stacey L. Garber, M.D.
Board Certified Specialist in Family Medicine
Med School: University of Washington
Residency: North Colorado Family Medicine

Christopher T. Kennedy, M.D.
Board Certified Specialist in Family Medicine
Med School: Southern Illinois University
Residency: North Colorado Family Medicine

Anna C. Puls, PA-C
Board Certified Physician Assistant
School: Des Moines University
Special Interests: Women’s health and contraceptive management, pediatrics and diabetes care.
"When not at work, I enjoy spending time in God’s creation with my husband and four sons. My garden is half weeds / half veggies and my house is never as tidy as I would like it to be, but I’m happy and wouldn’t have it any other way!"

Daniel P. Pflieger, M.D.
Board Certified Specialist in Family Medicine
Med School: University of Nebraska
Residency: North Colorado Family Medicine
Special Interests: Endoscopy/colonoscopy, sports injuries, hypertension, diabetes

Mark D. Young, M.D.
Board Certified Specialist in Family Medicine
Med School: University of Texas, Houston
Residency: North Colorado Family Medicine
Special Interests: Pediatrics, preventive health care

Johnstown Office

Cara E. Brown, M.D.
Board Certified Specialist in Family Medicine
Med School: University of Missouri - Kansas City
Residency: St. Anthony's Hospital, Oklahoma City
Special Interests: Women's and adolescent health including ADHD
Dr. Brown strives to improve and maintain her patients' physical, emotional, social and spiritual health. She enjoys spending time with her family, being involved with her church, skiing and reading.

J. Matthew Brown, M.D.
Board Certified Specialist in Family Medicine
Med School: University of Missouri - Kansas City
Residency: St. Anthony's Hospital, Oklahoma City
Special Interests: Sports medicine and adolescent medicine
Dr. Brown's approach to family medicine addresses the physical, emotional and spiritual needs of his patients. He believes in empowering each person through health maintenance, disease prevention, and chronic disease management to live life to the fullest.

Brian K. Elder, PA-C
Board Certified Physician Assistant
School: Idaho State University
"I enjoy full spectrum family practice care including acute care and chronic disease management. In my spare time I enjoy ice hockey, whitewater kayaking, golfing and spending time with my family and friends."

Carrie W. Reynolds, PA-C
Board Certified Physician Assistant
School: Towson University
Interests: Full spectrum including women's care, endocrinology - thyroid, diabetes and metabolism, pediatrics
"I strive for a patient-centered approach, empowering people through education and understanding of their condition. I'm a runner/triathlete and spend as much time as I can active and outdoors with my husband and our two young boys."

West Office

Joanna H. Branum, M.D.
Board Certified Specialist in Family Medicine
Med School: University of California, San Diego
Residency: North Colorado Family Medicine
Special Interests: Dr. Branum loves to take care of the whole family through acute and chronic issues, and has a special interest in mood disorders.

Daniel R. Clang, D.O.
Board Certified Specialist in Family Medicine
Med School: University of Health Sciences - Kansas City, MO
Residency: Michigan State University

Tamara S. Clang, D.O.
Board Certified Specialist in Family Medicine
Med School: University of Health Sciences - Kansas City, MO
Residency: Michigan State University

Maria E. Gallo, D.O.
Board Certified Specialist in Family Medicine
Med School: Rocky Vista University - Parker, CO
Residency: North Colorado Family Medicine
Special Interests: Whole-family care from infants to elderly including obstetrics with c-sections and post partum tubal ligations.
Dr. Gallo was born and raised in Colorado and loves anything to do with the mountains, snow, or the outdoors. She also enjoys working with refugees and as a member of a disaster relief team. 

Carol A. Gannon, BS, MA, MSN/FNP-C
Board Certified Nurse Practitioner
Bachelor of Science: The University of Akron; Akron, OH
Master of Arts: Bowling Green State University; Bowling Green, OH
Master of Science, Nursing: Vanderbilt University; Nashville, TN
Rotary Foundation International Scholar: The University of Melbourne, Australia
“As a child I had experiences that showed me the value of education and travel. For this reason I pursued both with enthusiasm & vigor. As an adult other life adventures took place that deepened my commitment to the human condition including the loss of loved ones and a personal experience with breast cancer. I’m passionate about patient education and creating that ‘aha moment’ whether with a child, adolescent, adult or - our most important treasure - senior citizens. When not at work I’m a doggy-mommy and continue to embrace life’s mysteries.”

R. Scott Haskins, M.D.
Board Certified Specialist in Family Medicine
Med School: University of Colorado
Residency: University of Wyoming
Special Interests: Hypertension, cholesterol, diabetes, osteoporosis

Matthew L. Martinez, M.D.
Board Certified Specialist in Family Medicine
Med School: University of Colorado
Residency: Scottsdale Memorial - Scottsdale, AZ
Special Interests: Obstetrics
Dr. Martinez was born and raised in Longmont, CO and has practiced in Greeley since 1997. He and his wife Patricia have two kids (Janelle and Joseph). He enjoys tennis, fishing, golf, snowboarding, and mountain biking.

Amy E. Mattox, M.D.
Board Certified Specialist in Family Medicine
Med School: Loma Linda University - Loma Linda, CA
Residency: North Colorado Family Medicine
Special Interests: Children and adolescents, women's health
Dr. Mattox was born in New Mexico, grew up Arizona, went to school in California, but has made her home in Greeley with her husband and three children.

Chad A. Maurer, M.D.
Board Certified Specialist in Family Medicine
Med School: University of Kansas
Residency: North Colorado Family Medicine
Special Interests: Full-spectrum family medicine, including obstetrics, tubal ligation and vasectomy
Dr. Maurer's hobbies include exercising, church, spending time with friends and family, golf and recreational sports. 

Chima C. Nwizu, M.D., F.A.A.F.P.
Board Certified Specialist in Family Medicine
Board Certified Specialist in Obesity Medicine
Diplomate, American Board of Clinical Lipidology
Med School: University of Benin - Benin City, Nigeria
Residency: Bronx-Lebanon Hospital - Bronx, NY
Harlem Hospital (General Surgery) - New York, NY
Santa Clara Valley Obstetrics Fellowship - San Jose, CA
Special Interests: Whole-family care, weight loss, hospital care, obstetrics, including cesarean section. Specialist in cholesterol management, heart disease and stroke risk reduction.

Michelle K. Paczosa, D.O.
Board Certified Specialist in Family Medicine
Med School: Western University of Health Sciences
Residency: St Joseph's Hospital, Denver
Special Interests: Complete family care, women's health, pediatrics and aesthetic services including BOTOX (R) and Juvaderm.
Dr. Paczosa enjoys spending time with her family, outdoor activities and traveling.

Carrie W. Reynolds, PA-C
Board Certified Physician Assistant
School: Towson University
Interests: Full spectrum including women's care, endocrinology - thyroid, diabetes and metabolism, pediatrics
"I strive for a patient-centered approach, empowering people through education and understanding of their condition. I'm a runner/triathlete and spend as much time as I can active and outdoors with my husband and our two young boys."

Kyle B. Waugh, M.D.
Board Certified Specialist in Family Medicine
Med School: University of Oklahoma
Residency: University of Oklahoma
Special Interests: Whole-family care, hospital care, obstetrics, including cesarean section

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